international conference on condensed matter and … · limiter (fcl) with 2g hts conductor winding...

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ÇUKUROVA UNIVERSITY

INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND MATERIAL

SCIENCES

2019 | 14-19 October , Adana/ TURKEY

http://iccm2019.cu.edu.tr

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SPONSORS

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Preface

Dear Participants,

I am very pleased to welcome you all to the “International Conference on Condensed Matter

and Materials Science-2019 (ICCMMS-2019)” organized between 14-19 October, 2019 in

Mithat Özsan Amfi of Çukurova University, Adana, Turkey.

The conference was open to all physics researchers and graduate students from all the

countries. The purpose of the conference was to provide a platform for researchers and

graduate students in the areas identified in Condensed Physics and Materials Science to

publicize their ongoing research work through oral and poster presentations. The aim of the

oral and poster presentation was to encourage the young researchers and students to research

and practice on giving presentations. In this way, the young researchers and graduate students

would have the opportunity to interact with their peers and publicize and get feedback on their

work, exchange experiences, make contacts, and learn what other researchers are doing in the

Condensed Matter Physics and Material Sciences.

It is particularly pleasing to see participation of so many graduate students, young researches

and senior scientists. We are grateful to you for your contributions and support. We should

also like to thank to Tubitak for support (2223-B Scientific Meetings Grants Program,

Project Number-1929B021900661) and our sponsors for their generous contributions in this

conference.

Yours Sincerely,

Bekir ÖZÇELİK

Director for ICCMMS-19

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Director: Prof. Dr. Bekir ÖZÇELİK

Local Organizing Committee Halil İbrahim Yavuz

Sezen ÖZÇELİK

Honory Committee

Prof. Dr. Mustafa KİBAR (Rector of Cukurova

University)

International Advisory Board

Prof.Dr. Javier CAMPO (SPAIN)

Prof.Dr. Xerman de la Fuente LEIS (SPAIN)

Prof.Dr. Luis Alberto ANGUREL (SPAIN)

Prof.Dr. Andres SOTELO (SPAIN)

Prof.Dr. Katsuya INOUE (JAPAN)

Prof.Dr. Vasudeva SIRUGURI (INDIA)

Prof.Dr. Garry MCINTYRE (AUSTRALIA)

Scientific Committee

M.Ali AKSAN (İnönü Univ.)

Canan AKSOY (KTÜ)

Naoyuki AMEMİYA (Japan)

Luis Alberto ANGUREL (Spain)

Lutfi ARDA (Bahçeşehir Univ.)

Alev AYDINER (KTÜ)

İbrahim BELENLİ (Abant İzzet Baysal Univ.)

Nejat BULUT (İYTE)

Javier CAMPO (Spain)

Florinda COSTA (Portugal)

Şükrü ÇAVDAR (Gazi Univ.)

Şükrü ÇELİK (Sinop Univ.)

Tolga DEPÇİ (İSTE)

Ahmet EKİCİBİL (Cukurova Univ.)

Yüksel ERGÜN (Anadolu Univ.)

Ayşe EROL (İst.Üniv.)

Mehmet ERTUĞRUL (Atatürk Univ.)

Ramazan ESEN (Cukurova Univ.)

Xerman de la FUENTE (Spain)

Ali GENCER (Ankara Uni.)

Oğuz GÜLSEREN (Bilkent Univ.)

Marian JASKULA (Poland)

Kazuo KADOWAKI (Japan)

Hiroshi KAGAYEMA (Japan)

Faruk KARADAĞ (Cukurova Univ.)

Hakan GÜNDOĞMUŞ (Hakkari Univ.)

Hakan GÜNGÜNEŞ (Hitit Univ.)

Hamide KAVAK (Çukurova Univ.)

Kazumasa IIDA (Japan)

Haluk KORALAY (Gazi Univ.)

Andrei KOVALEVSKY (Portugal)

Çağlıyan KURDAK (USA)

Igor MOROZOV (Russia)

Marwan MOUSA (Jordan)

Süleyman ÖZÇELİK (Gazi Univ.)

Sezen ÖZÇELİK (Hakkari Üniv.)

Kemal ÖZTÜRK (KTÜ)

Sultan ÖZTÜRK (KTÜ)

Özgür ÖZTÜRK (Kastamonu Üniv.)

Berdan ÖZKURT (Mersin Üniv.)

Lütfi ÖZYÜZER (İYTE)

Shahed RASEKH (Portugal)

M.Anis-ur-REHMAN (Pakistan)

Burcu SAVAŞKAN (KTÜ)

Anatoli SIDORENKO (Moldova)

Andres SOTELO (Spain)

Yoshihiko TAKANO (Japan)

Ebru Şenadım TÜZEMEN (Cumhuriyet Univ.)

Pan WEI (China)

Akiyasu YAMAMOTO (Japan)

H.Ibrahim YAVUZ (MSU)

Ali ZAOUI (France)

Invited Speakers

Luis Alberto ANGUREL

Ali BOZBEY

Javier CAMPO

Juan B.Carda CASTELLO

Adrian CRISAN

Tolga DEPÇİ

Yüksel ERGÜN

Ramazan ESEN

Ali GENCER

Oğuz GÜLSEREN

Samir KHENE

Andrei KAVALEUSKİ

Xerman de la Fuente LEIS

Kemal ÖZTÜRK

Sultan ÖZTÜRK

Halime Ö.PAKSOY

Shahed RASEKH

David Muñoz-ROJAS

Andres SOTELO

Yoshihiko TAKANO

Akiyasu YAMAMOTO

H.Ibrahim YAVUZ

Ali ZAOUI

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International Conference on Condensed Matter and Materials Science

ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

INVITED SPEAKERS

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ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

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DC

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Temperature (K)

I-01

Multi-harmonic Susceptibility Response and Steep Vortex Melting Line in Iron-based

Superconducting Single Crystal CaKFe4As4

A. Crisan1, L. Miu1

1National Institute for Materials Physics Bucharest, 077125, Magurele, Bucharest

Corresponding Author: [email protected]

The discovery of iron-based superconductors (IBSs) has prompted great interest not only in

their unconventional superconducting mechanism with high transition temperatures, but also

in their potential for applications. The most attractive material for applications among various

kinds of IBSs is the 122-type (Ba,K)Fe2As2. It has a high transition temperature Tc of ∼ 38 K

for bulk, high upper critical field, Hc2 (>700 kOe), and small anisotropy (γ<2). Recently, a

new type of IBSs, i.e., 1144-type with CaKFe4As4 as one of their representatives, has been

found [1]. Its crystal structure is similar to 122-type compounds. CaKFe4As4 has a tetragonal

structure (P4/mmm), where the Ca and K layers stack alternatively along the c axis. Several

properties of 1144-type compounds have been studied such as superconducting gap state,

penetration depth, pressure effects on crystal structure, anisotropy of critical current density.

We report on the multi-harmonic susceptibility response of very good quality CaKFe4As4

single crystals, in various conditions and cooling conditions. The measurements were

performed using a PPMS equipment with DC fields up to 14 T, with ac field amplitude up to

15 Oe and frequency up to 1 kHz. Following a procedure previously reported, the on-set of

the third harmonic susceptibility which is due to non-linear dissipation only marks the

temperature at which the vortex system becomes glassy, at the given DC field. Many such

measurements allowed us to determine the vortex melting line in our 1144 single crystal,

which is shown Fig. 1.

Please note that on the temperature axis the graph

starts at 20 K to emphasize the huge vortex melting

field at such temperature easily attainable by liquid

hydrogen or closed-cycle cryocoolers. Such very

steep melting line indicate at the possible very high

fields applications of this newly-discovered system.

Fig. 1: Vortex melting line of CaKFe4As4 single crystal.

References

1. A. Iyo, K. Kawashima, T. Kinjo, T. Nishio, S. Ishida, H. Fujihisa, Y. Gotoh, K. Kihou, H. Eisaki, and Y.

Yoshida, J. Am. Chem. Soc. 138, 1410 (2016).

2. A. Crisan, A. Iyo and Y. Tanaka, Appl. Phys. Lett., 83, 506-508 (2003).

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ICCMMS-2019

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ADANA, TURKEY

I-02

Recent Progress in The Development Of Polycrystalline Superconducting Bulk Magnets

A. Yamamoto1,2

1 Department of Applied Physics, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan 2 Materials Research Center for Element Strategy, Tokyo Institute of Technology, Kanagawa 226-8503, Japan


The trapped field in a superconducting bulk is a unique and direct manifestation of quantum

phenomena on the visible scale. The discovery and development of cuprate high temperature

superconductors opened the ways for applications of superconducting bulks, such as high

performance motors, generators, and analytical instruments. The recent achievement of a very

high trapped field of 17.6 T in 1-inch diameter GdBCO bulks [1] demonstrated the potential

of high temperature superconducting bulks as super-strong, compact permanent magnet. On

the other hand, Fe-based superconductors (IBSC) and MgB2 are 40-60 K-class high

temperature superconductors which would provide another opportunity to use

superconducting bulks in large size because of their intrinsic thermal stability at cryocooled

operating temperatures. The remakable difference between IBSC/MgB2 and cuprates is that

their grain boundaries do not exhibit strong limitation of intergranular supercurrent (less

weak-link) [2,3]. Moderately high critical current density in randomly oriented IBSC and

MgB2 polycrystalline bulks would be advantageous for producing bulks in large size with

various shapes by scalable processes [4,5]. In this study, we report (i) synthesis and properties

of dense MgB2 bulks by newly developed Mg vapor transport (MVT) process, and (ii)

investigation of simple, non-destructive technique for detecting internal defects in MgB2 bulk

prepared by MVT process. (i) Disk-shaped boron pellets as a precursor of the disc-shaped

MgB2 bulk and the Mg source were separately placed, and pure vapor evaporated from the

Mg source was transported through the holed division walls, then diffused into and reacted

with boron. The packing factor of MVT MgB2 bulk is more than 80 %, which is largely

improved compared to the in situ method. Rietveld analysis showed that the fraction of MgO

was ~2at%. Jc of the sample by the MVT method reached 0.8 MA/cm2 at 20 K which is twice

higher than that of the in situ method, suggesting that denser microstructure contributed to the

superior transport current path. (ii) To detect internal inhomogeneities, a method of measuring

electrical resistivity by changing the direction of applied current and the positions of voltage

terminals was examined. The potential distribution of the bulk surface with internal defects

was calculated by simulation, and the relationship between defect position and observable

potential difference between the voltage terminals were investigated. We have succeeded in

identifying the position of internal inhomogeneities in MVT MgB2 bulk.

This work was supported by MEXT Element Strategy Initiative to Form Core Research

Center, and partially supported by JST CREST Grant Number JPMJCR1814, Japan, and by

JSPS KAKENHI Grants JP15H05519 and JP18H01699.

References

1. J. H. Durrell, A. R. Dennis, J. Jaroszynski, M. D. Ainslie, K. G. B. Palmer, Y. H. Shi, A. M. Campbell, J.

Hull, M. Strasik, E. E. Hellstrom, D. A. Cardwell, Supercond. Sci. Technol. 27, 082001 (2014).

2. D. C. Larbalestier et al., Nature 410, 186 (2001).

3. H. Hosono, A. Yamamoto, H. Hiramatsu, Y. Ma, Materials Today 21, 278 (2018).

4. A. Yamamoto, A. Ishihara, M. Tomita, K. Kishio, Appl. Phys. Lett. 105, 032601 (2014).

5. J. D. Weiss, A. Yamamoto, A. A. Polyanskii, R. B. Richardson, D. C. Larbalestier, E. E. Hellstrom,

Supercond. Sci. Technol. 28, 112001 (2015).

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ADANA, TURKEY

I-03

Design and Construction of an 100 kVA Innovative Transformer as a

Superconducting Fault Current Limiter

Ali Gencera,b, Ercan Ertekinb, Elvan Coskunb, Sahure Gecerb, Ebru Simsek Kilicarslanb, Serap

Safrana,b and Yasuharu Kamiokab,c

a Ankara University, Faculty of Sciences, Physics Department, 06100-Tandogan-Ankara, TURKEY

b Ankara University, Center of Excellence for Superconductivity Research, 50th Year Campus, 06830-Golbasi-

Ankara, TURKEY cColdTech Associates, 6-5, Takanodai, Kodaira,187-0024 Tokyo, Japan

An innovative type three-phase hybrid transformer has been designed as a Fault Current

Limiter (FCL) with 2G HTS conductor winding loop. This is a hybrid transformer which

consists of copper, superconducting windings and 3 independent conventional iron core with

an innovative design as a step-down transformer from RMS value 33 kV to 380 V on the 1-

phase. Simulation studies have been performed with COMSOL software. In the design,

superconducting tapes were used to transfer energy from the primary coil to the secondary. A

by-pass has been introduced to the iron-core, in which one core’s leg was wound by a

superconducting (SC) coil. The geometry and the magnetic reluctance of the leg plays a

crucial role as the SC coil has two phases, namely superconducting and normal states. In the

quenched state for the SC coil, the magnetic flux is allowed to flow in the SC coil. In the

superconducting state, almost all the magnetic flux is transferred to the secondary coil and

virtually no flux is allowed to flow in the SC coil as expected. We will show that the length of

SC tape (coated conductor) become significantly reduced to lower the cost of the transformer.

The cost issue is one of the important obstacles to limit large market penetration of such

sophisticated innovative devices to be used as SCFCL. Some geometric designs have been

developed to perform simulations and a detailed comparison were made. On the other hand,

the cryostat designed to operate at 77K has another advantage of cost effectiveness when

compared with other type of SCFCL systems. An innovative approach to control the

dynamics of quench in the SC coil loop during the fault, will be presented. Both the cryostat

and the transformer designs are in compatible to operate in harmony, and the system is shown

to activate within 5 msec to limit the fault current before the circuit breaker sets in (usually

more than 100 msec.).

Acknowledgment: This research is supported by TUBITAK via the project number

216M300.

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ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-04

Theoretical studies on various compounds and ternary systems under peculiar

environment effect

Ali Zaoui

LGCgE, Polytech’Lille, University of Lille1 Sciences and Technologies, Cite Scientifique, Avenue Paul

Langevin, 59655 Villeneuve d’Ascq,

France.

Email : [email protected]

In this talk I will give, first, an overview on some recent studies related to semiconductors in

the bulk, doped, alloys and superlattices cases. It will be presented for different structures and

phases under pressure and temperature effects. In addition, electronic and optical properties of

the considered prototype materials will be presented and discussed. Detailed analysis will be

given at the nanoscale level from first-principles calculations based on density functional

theory.

In the second part of my talk I will present some recent results related to surface morphology

of carbonates, as well as their behaviors under water and pressure effects. The hydrous phases

are of considerable interest for their role as precursors to stable carbonate minerals. I will

present detailed recent results concerning structural and energetic stability of dry and hydrous

surfaces of calcium carbonate polymorphs using two recently developed force fields. Finally I

will show and discuss the computed morphology pictures obtained from MD simulation and

compared to observed SEM images. Besides, further recent studies will be shown regarding

the interface between clay and carbonate surfaces under anisotropic constrains as well as

shear stress. Various mechanical properties will be presented with and without the presence of

water, under nuclear radioactive storage conditions.

mailto:[email protected]

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ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-05

Superconducting Supercomputing

Ali Bozbey1, Fatih Akyürek1,2, Seda Demirhan1,2, Oğuz Ergin3, Altay Karamüftüoglu1, İlker

Polat1, Sasan Razmkhah4

1TOBB University of Economics and Technology, Dept. of Electrical and Electronics Eng., Ankara, Turkey 2ASELSAN INC, Ankara Tırkey

3TOBB University of Economics and Technology, Dept. of Computer Engineering, Ankara, Turkey 4IMEP-LAHC, CNRS UMR5130, Université Savoie Mont Blanc, 73376 Le Bourget du Lac, France


With the recent advances in the superconducting digital microelectronics and continuously

increasing need for computing power, superconducting high-performance computing systems

becomes feasible in terms of technology, performance, and cost. Superconducting computing

can be classified in three main areas: i) classical architectures, ii) quantum computing iii)

neuromorphic computing. In this talk, we will review the current state of the art and report our

progress on superconducting computing studies.

This work has been supported by TUBITAK under grant 117E816.


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ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-06

Effect of Tic Nanoparticles Addition On The Properties Of Ca3Co4O9 Ceramics

A. Sotelo1,*, H. Amaveda1, M. Mora1, S. Marinel2, M. A. Torres1, M. A. Madre1

1ICMA (CSIC-Universidad de Zaragoza),C/María de Luna, 3. 50018 Zaragoza. Spain 2 Normandie Univ, ENSICAEN, UNICAEN, CNRS, CRISMAT, 14000 Caen, France


Thermoelectric (TE) materials are regarded as important players for a sustainable future, due

to their simplicity, scalability, and self-sustainability in all kind of applications:

remote/attended or mobile/static ones. Among all thermoelectric families, oxide-based

materials gain more importance when considering that they are cheaper, and possess lower

toxicity than the traditional ones. Moreover, they are usually composed by less scarce

elements, and can be used at high temperatures without the need of using protecting

atmospheres. These typically very aggressive conditions are opening new opportunities for

energy recovering TE devices. On the other hand, the main drawback associated to these

materials is their relatively low performances and, consequently, it is desirable to increase

them before they can be integrated in practical applications.

In this work, the effect of TiC nanoparticles addition (from 0 to 1 wt.%), to p-type Ca3Co4O9

material will be studied. The structural and microstructural modifications induced by these

additions will be determined and related to the thermoelectric performances. In addition, the

changes produced by these nanoparticles additions will be evaluated through a much less

studied point of view, their mechanical properties, which are of the main importance for

predicting the robustness of the resulting thermoelectric modules built using these materials.

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ICCMMS-2019

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ADANA, TURKEY

I-07

Open-air, low temperature fabrication of advanced composite transparent electrodes

David Muñoz-Rojas, Viet Huong Nguyen, Joao Resende, Dorina T. Papanastasiou, Nil

Fontanals, Carmen Jiménez, Daniel Bellet

1 Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France.


We report the study of nanocomposite transparent electrodes based on Aluminium doped Zinc

Oxide (ZnO:Al) thin films1 and silver nanowire (AgNW) networks.2–5 The electrodes are fully

fabricated by low-cost, open-air techniques, namely, atmospheric pressure spatial atomic layer

deposition (AP-SALD)6,7 and spray coating. We show that the transparency and the

conductivity of the ZnO:Al/AgNW nanocomposites can be tuned by controlling the AgNW

network density. We also demonstrate that the thermal, electrical and mechanical stabilities of

the composites are superior to those of AgNW networks or ZnO:Al thin films separately. We

have also developed a theoretical model to explain the relationship between the conductivity

of the composites and the AgNW network

density. Our results provide a means to

predicting the physical properties of such

nanocomposites for applications in solar

cells and other optoelectronic devices.

Finally, the deposition methods used open

the way towards stable, low-cost flexible

and transparent electrodes for industrial

application.8

Fig. 1: Scheme of the composite transparent

electrodes based on AgNW networks and

ZnO:Al deposited by SALD.

References 1 V.H. Nguyen, U. Gottlieb, A. Valla, D. Muñoz, D. Bellet, and D. Muñoz-Rojas, Mater. Horizons 5, 715 (2018). 2 T. Sannicolo, D. Muñoz-Rojas, N.D. Nguyen, S. Moreau, C. Celle, J.-P.P. Simonato, Y. Bréchet, and D. Bellet,

Nano Lett. 16, 7046 (2016). 3 T. Sannicolo, N. Charvin, L. Flandin, S. Kraus, D.T. Papanastasiou, C. Celle, J.P. Simonato, D. Muñoz-Rojas,

C. Jiménez, and D. Bellet, ACS Nano 12, 4648 (2018). 4 T. Sannicolo, M. Lagrange, A. Cabos, C. Celle, J. Simonato, and D. Bellet, Small 12, 6052 (2016). 5 M. Lagrange, T. Sannicolo, D. Muñoz-Rojas, B.G. Lohan, A. Khan, M. Anikin, C. Jiménez, F. Bruckert, Y.

Bréchet, and D. Bellet, Nanotechnology 28, 055709 (2017). 6 D. Muñoz-Rojas and J. MacManus-Driscoll, Mater. Horizons 1, 314 (2014). 7 D. Muñoz-Rojas, Viet Huong Nguyen, C. Masse de la Huerta, C. Jiménez, and D. Bellet, in Chem. Vap. Depos.

Nanotechnol. (Intech open, 2019), p. 1. 8 V.H. Nguyen, J. Resende, D.T. Papanastasiou, N. Fontanals, C. Jiménez, D. Muñoz-Rojas, and D. Bellet,

Nanoscale 11, 12097 (2019).

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ICCMMS-2019

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ADANA, TURKEY

I-08

The role of the thermal fluctuations in cubic helimagnets: stabilization of new phases at

low temperature

Victor Laliena and Javier Campo

1Material Science Institute of Aragon, CSIC-University of Zaragoza, Zaragoza, E-50009, Spain

The role of thermal fluctuations in the stabilization of the magnetic states that appear in cubic helimagnets is theoretically analyzed, using a saddle point expansion to obtain the free energy. It is shown that in the low

temperature region thermal fluctuations destabilize the conical state and stabilize the skyrmion lattice (SKL)

near the transition to the forced ferromagnetic state. Also, a new phase, whose features cannot be determined with our method, appears in this region of the phase diagram (Figure left) [1]. This new state, and the SKL at

low temperature, have been recently found in Cu2OSeO3 [2, 3]. It is also shown that at high temperature and low field, near the phase boundary, thermal fluctuations stabilize the SKL, which becomes the equilibrium

state (Figure right) [4]. Comparisons with recent experimental results [2, 3] and with the computations of

Mühlbauer et al. [5] are given.

Figure: left, theoretical phase diagram of the cubic helimagnet, including the effect of Gaussian fluctuations, in

the low T region; right, same in the high T region (the parameter a controls the variation of temperature)

References [1] V. Laliena and J. Campo, Phys. Rev. B96, 134420 (2017)

[2] F. Qian et al. Sci. Adv. 2018;4:eaat7323 21 (2018)

[3] A. Chacon et al., https://doi.org/10.1038/s41567-018-0184-y Nature Physics, (2018).

[4] V. Laliena, G. Albalate, and J. Campo, Phys. Rev. B98, 224407 (2018).

[5] S. Mühlbauer et al., Science 323, 915 (2009).

Keywords: chiral magnetism, helimagnets, skyrmions, fluctuations

https://doi.org/10.1038/s41567-018-0184-y

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ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-09

Challenges in the search of new functionalities in the ceramic and vitroceramic

materials

J.Carda1, D. Fraga1, T.Stoyanova1, J. Llop2, M. Notari2, N. E. Cespedes3, J. S. Valencia3

1Universitat Jaume I,, Dept. of Inorganic and Organic Chemistry, 12071, Castellón, Spain 2Escola Superior de Cerámica de Alcora, 12110, L’Alcora, Spain

3Universidad Nacional de Colombia, Bogota, Colombia


It is well known, that the ceramic tiles are traditional constructive elements that are improving

constantly in the last years. The use of ecological products become of a vast importance in the

ceramic industry in order to optimize the consumption of natural resources and to the growing

attention to the environmental safeguard because the residues cause big environmental impact

and increase the industrial running costs [1-2].

Thin films photovoltaic devices deposited onto ceramic and glass-ceramic substrates have a

strong interest for the development of large area solar modules that can be easily integrated in

a wide range of buildings and structures (BIPV). Recently, very encouraging results have

been obtained in the development of Cu(In,Ga)Se2 (CIGS) based solar cells onto ceramic

substrates. Nonetheless, CIGS has the problem of In scarcity for the future mass deployment

of photovoltaic modules based on this material [3-4]. In this sense, many efforts are focused

on the development of new earth abundant and low toxic materials, which can ask to the

increasing demand of electricity produced with solar energy. Among the absorbers under

study, a family of compounds generally called kesterites (Cu2ZnSn(S,Se)4, are attracting a

considerable interest, because fulfill all the properties required to be a good photovoltaic

absorber: direct band gap, high light absorption coefficient and p-type conductivity. Also,

these materials are formed only by earth abundant and/or low toxic elements. In this concept,

we report a development of sustainable ceramic and glass-ceramic tiles by using wastes and

recycled materials from different industrial sectors like ceramic, glass and thermal plants.

Photovoltaics innovations are achieved by functionalization of the ceramic tiles discussed in

the report. CIGS or CZTS kesterite solar cells have been mainly prepared onto ecological

ceramic and glass-ceramic substrates, covered by Mo as back contact, and additionally,

different types of layers (buffer layer –CdS- and windows layers -ZnO and ITO-) have been

employed to complete the photovoltaic device (Fig.1.).

Fig.1. Images of a) ceramic photovoltaic device and b) SEM cross section of the different layers References

1. Fraga D., Barrachina E., Calvet I., Stoyanova Lyubenova T.S., and Carda J.B., Mater. Lett., 221, 104–

106 (2018).

2. Lyubenova T.S., Fraga D., Carda J.B., Kozhukharov V., and Machkova M.S., J. Chem. Technol.

Metall., 53, 1103–1116 (2018).

3. Fraga D., Stoyanova Lyubenova T., Martí R., Calvet I., Barrachina E., Carda J.B., Solar Energy, 147, 1-

7 (2017).

4. Fraga D., Stoyanova Lyubenova T., Martí R., Calvet I., Barrachina E. and Carda J.B., Ceram. Int., 42,

7148-7154 (2016).

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ICCMMS-2019

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I-10

Preliminary Studies on HTS-Maglev System Based on Multi-Surface HTS-PMG

Arrangements

K. Ozturk1 and M. Abdioglu2

1 Department of Physics, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey 2 Department of Mathematics and Science Education, Faculty of Education, Bayburt University, 69000, Bayburt,

Turkey


The superconducting Maglev, superconducting electric motors and the flywheel energy

storage systems are based on the magnetic bearing technology. Although various groups and

institutes have been working on superconducting bearing systems, the results showed that the

levitation force, guidance force and magnetic stiffness parameter of these systems are not just

at desired level as technologically applications and commercial using [1-3]. Actually, the

main cost of Maglev systems comprises of the cost of PMG with permanent magnet (PMs)

because the PMs in PMG have to be arranged for thousands of kilometers. Therefore, while

the magnetic force properties enhancing, the fabrication cost of Maglev systems also should

be considered for widespread technological usage of these system. In our study, primarily, the

multi-surface HTS-PMG Maglev system was constructed to carry out experimental studies

and to investigate the optimum levitation force, guidance force and stiffness parameter

together with the considering all system cost (HTS: High Temperature Superconductor).

Additionally, a numerical modeling, based on finite element method with H-formulation, is

used to determine trapped magnetic field and current properties of the HTS and magnetic field

distribution of PMGs. From the all experimental measurements and numerical calculation on

multi-surface HTS-PMG arrays it is seen that the levitation and stabilization properties of the

Maglev system enhances, depending on appropriate PMG-HTS arrangement and magnetic

field distribution, when the number and size of the interface surface between PMG and HTS

superconductors increase.

References 1. K. L. Kovalev et.al., IEEE Trans. Appl. Supercond., 26, 5203204 (4pp) (2016).

2. F. N. Werfel, U. Floegel-Delor, R. Rothfeld, T. Riedel, B. Goebel, D .Wippich, and P. Schirrmeister,

Supercond. Sci. Technol. 25, 014007 (16pp) (2012).

3. K. Ozturk, M. Kabaer, M. Abdioglu, A. Patel, A. Cansiz, J. Alloys Compd. 689, 1076-1082 (2016).

4. Deniz Çakır, Cem Sevik, Oğuz Gülseren, Francois M. Peeters; Mo2C as a high capacity anode material: a

first-principles study, Journal of Materials Chemistry A4, 6029-6035, (2016).

16


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-11

New guidelines for oxide thermoelectrics: redox tuning and controlled interactions

A.V. Kavaleuski1

1CICECO – Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of

Aveiro, 3810-193 Aveiro, Portugal


Development of thermoelectrics for high-temperature applications imposes several essential

requirements on the material properties. In some energy-conversion scenarios the cost and

thermal stability requirements may dominate over efficiency issues, making abundant, high-

temperature-stable and low-toxic oxides an interesting alternative TEs. The talk will feature

some promising strategies to design performing oxide-based thermoelectrics. Particular

attention will be given to the approaches where the inherent redox flexibility of oxides is

invoked for tailoring the TE properties through in-situ formation of nanocomposites with

enhanced performance. Another strategy is based on a self-forming nanocomposite concept

for ZnO-based thermoelectrics, where a controllable interplay between exsolution of the

nanophases and modification of the host matrix suppresses the thermal transport, while

imparting the high electrical performance. The mechanisms behind the observed enhancement

in thermoelectric properties and specific pathways towards high TE performance in oxides

will be proposed and discussed.

Fig. 1: Comparison of the thermoelectric efficiency (ZT) in non-modified and redox-tuned SrTiO3-

based materials, and corresponding SEM/EDS and STEM -HAADF images (A). Representative

microstructure and chemical mapping results for Zn(Al,Zr)O-ZnAl2O4-ZrO2 nanocomposite and

comparison of the power factor (2) and thermal conductivity (ph) in nanocomposite and non-

modified matrix (B).

Acknowledgements: projects CICECO-Aveiro Institute of Materials (ref. UID/CTM/50011/2019) and

POCI-01-0145-FEDER-031875, financed by COMPETE 2020 Program and National Funds through

the FCT/MEC and when applicable co-financed by FEDER under the PT2020 Partnership Agreement.

20 µm

more Mo in B-sites

more La in A-sites

1 µm

Mo

ZrO2

ZnAl2O4

600 nmAl Zr

non-modified matrix

self-forming nanocomposite

A B

17


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-12

Generation of Nanostructures in Metallic Surfaces using Subnanosecond UV Laser

Processing

A. Cubero, L. Porta-Velilla, M. Castro, L.A. Angurel, G.F. de la Fuente, E. Martínez, R.

Navarro

1Instituto de Ciencia de Materiales de Aragón, ICMA (CSIC-University of Zaragoza), 50018 Zaragoza, Spain


The development of short-pulse lasers has opened new possibilities in the functionalization of

materials surfaces. Laser-induced Periodic Surface Structures (LIPSS) are a common

phenomenon observed in a broad range of materials, when their surfaces are irradiated with

these lasers. The adequate control of the nanostructures generated on the surface of the

material allows obtaining new properties that are useful in different fields: induce colour,

iridescence behaviour, modify hydrophilic or hydrophobic properties or improve resistance to

microorganisms.

In this work we present the rich surface structure phenomenology that has been observed

when the surface of different metals (Nb, Ni, steel) is irradiated with a subnanosecond (300

ps) UV laser, and how it affects some of their properties. The influence of different laser

parameters, as the laser polarization direction, the pulse irradiance, laser scanning speed and

the overlapping in the perpendicular direction, have been studied and a complete set of

nanostructures have been defined. Laser treatments have been performed in air, but also in

controlled atmospheres (Ar, N2) or with the surface immersed in liquids (Vaseline oil, water)

observing that the generated nanostructures are different depending on the particular

experimental conditions imposed. An important effort has been carried out in order to obtain

homogeneous nanostructures over extended areas, using a new laser line scanning protocol. In

these studies, it has been observed that not only the laser parameters affect the generated

nanostructure, but some materials properties are also important. Combining laser treatments

with EBSD studies it has been demonstrated that crystallography also plays an important role

in the generated nanostructure, observing that the level of interaction of the laser with a

particular grain has some correlation with its crystallographic order. It has ben also observed

that, in depending on the properties of the materials, nanostructures can be modified by the

application of external electromagnetic fields.

Acknowledgements

The authors gratefully acknowledge the financial support from MINECO-AEI-FEDER

(project ENE2017-83669-C4-1-R and MAT2016-79866-R), from PHOBIC2ICE (EU GA

690819) and SPRINT (EU H2020-FET-OPEN/0426) projects and from Gobierno de Aragón

“Construyendo Europa desde Aragón” (research group T54_17R).

18


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-13

Exploring MXenes/graphene heterostructures for ion battery applications

Oğuz Gülseren1

1Bilkent University, Department of Physics, 06800, Ankara, Turkey

Corresponding Autor: [email protected]

Two-dimensional materials are expected to become key components for novel applications for

not only electronic devices but also for energy storage applications including super capacitors

and batteries because of their exotic properties. MXenes are the newest class of two-

dimensional (2D) materials, they offer a great potential in a wide range of applications

including electronic devices, sensors, thermoelectric and energy storage materials. In this

work, we combined the outstanding electrical conductivity, that is essential for battery

applications, of graphene with MXene monolayers (M2CX2 where M=Mo, Sc, Ti, V and

X=OH, O or bare) to explore its potential in ion battery applications. First, the adsorption and

diffusion of Li, Na, K and Ca atoms on a Mo2C monolayer as well as MXene/graphene

heterostructures are systematically investigated by using density functional theory based

calculations. We predict a significant charge transfer from the ad-atoms to the Mo2C

monolayer, which indicates clearly the cationic state of the metal atoms. Then, through first

principles calculations, we determined the stable stacking configurations of M2CX2/graphene

bilayer heterostructures and their alkali atom intercalation by the calculating binding energy,

the diffusion barrier and voltage. We found that alkali metal intercalation is energetically

favorable and thermally stable for Ti2CO2/graphene and V2CO2/graphene heterostructures

but not for Sc2C(OH)2. Diffusion kinetics calculations proved the advantage of

MXene/graphene heterostructures over sole MXene systems as the energy barrier values are

halved at least for all considered alkali metals. Low energy barriers are found for Na and K

ions, implying fast charge/discharge rate promise. Given these advantages, Ti2CO2/graphene

and V2CO2/graphene heterostructures are predicted to be promising for ion battery

applications.


19


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-14

Carbon Based Films with Extraordinary Properties

R. Esen, W. Abusaid and B. Ozkan

Physics Dept. Univ. of Çukurova Adana/Turkey

In this work we present some carbon based films obtained from ECR plasma decomposition

of methane and graphitic carbon films obtained by cathodic vacuum arc deposition method.

The films produced by ECR plasma using methane gas as a starting material showed a

definite transmission window near 320 nm which is an unusual property one expects more

absorption as wavelength decreases.

Second group of unusual optical property is observed at carbon nanowalls obtained by pulsed

vacuum arc deposition method using graphite as starting material.

Keywords: ECR, PVACD, Carbon nanowall, SiC, DLC.

Acknowledgement: This work supported by C.U. BAP project FBA-2019-12021.

20


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-15

Thermoelectric Phenomena and Applications: A Quest for Performing Oxide

Thermoelectrics

Sh. Rasekh1, M.A. Madre2, F.M. Cosa3, A. Kovalevsky1, A. Sotelo2, J.C.Diez2, M.A.Torres2,

A. Natoli1


Aveiro, 3810-193 Aveiro, Portugal 2ICMA (CSIC-Universidad de Zaragoza), C/María de Luna 3, 50018 Zaragoza, Spain

3i3N, Departamento de Física, Universidade de Aveiro, 3810-193 Aveiro, Portugal


The epic challenge of the 21st century is filling the gap between energy supply and demand

with clean, reliable and cheap energy combatting climate changes. Therefore, a great deal of

effort has been made to develop new knowledge and technologies towards finding suitable

and affordable alternative carbon-free energy sources.

It is well known that in all thermal process/cycle a large amount of energy is wasted mainly as

a heat, which increases by rising the working temperature leading to an increase of the CO2

emissions affecting the global warming. One of the promising methods to recover this waste

energy and increase the overall energy efficiency is thermoelectric conversion. During the

past decade, thermoelectric (TE) materials have drawn significant attention for converting

directly heat energy into electrical one and vice versa based on Seebeck and Peltier effects.

Moreover, the simplicity of such systems opens limitless fabrication possibilities, which can

be adapted to the working condition in terms of dimensions, concepts and operation modes.

This high flexibility permits the TE modules, as a suitable source of “green” power

generation, to be applicable not only in the new designed systems, but also to be incorporated

into the already existed facilities and processes, through modifications and/or hybrids,

improving their overall efficiency.

In the past decade, particular interest is given to the oxide materials, due to their enhanced

thermal and redox stability, absence of toxicity, and natural abundance of prospective

constituent compounds as well as ability of enhancing their properties using different physical

or chemical methods.

In this talk the fabrication of bulk ceramic-based thermoelectric materials (i.e. p-type) will be

explored, seeking effective strategies for improving their overall performance and properties

using structural and microstructural modifications.

https://www.sciencedirect.com/science/article/pii/S0955221918307684?via%3Dihub#!


21


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-16

Production Properties of M-Type Strontium Hexaferrite Magnets

S. Öztürk, D.D. Çakıl, K. İcin 1Karadeniz Technical University, Dept. of Metallurgical and Materials Eng., 61082, Trabzon, Turkey


From their discovery, interest in hexagonal ferrite magnets has been increasing day by day.

These magnets have become significant materials, both commercially and technologically.

They constitute the majority of magnetic materials produced globally and have a wide range

of applications. Electrical devices, magnetic recording, and data storage devices and

especially microwave/GHz frequencies are among the most common applications. M-type

hexaferrites have lower energy product than NdFeB based permanent magnets which are

considered the highest energy magnets. However, the hexaferrite magnets are more preferred

because of their high performance/cost ratio, high thermal and chemical stability, and high

operating temperatures. The M-type strontium hexaferrite magnets which were first

discovered by the Philips Society in the 1950s [1, 2], have many usage areas such as

microwave devices, microwave filtration, recording devices, magneto-optic applications,

telecommunications industry, small electric motors, household appliances and so on [3].

According to the report published by the Expert Market Research research group, the annual

production capacity of hexaferrite magnets are 1 million tons and is expected to reach 1.5

million tons by 2024. The sources of high coercivity (max. 7 kOe), high magnetic saturation

and permanent magnetism of strontium hexaferrite magnets are mainly due to the easy

magnetization direction along the c-axis in the hexagonal structure and the high uniaxial

magnetocrystalline anisotropy field [4]. The magnetic properties of strontium hexaferrite

(SrM) magnets depend on many parameters such as chemical composition, grain size, and

morphology. In this study, the production of Sr-hexaferrite was carried out under different

production conditions (stoichiometric ratio, annealing temperature and time, milling time,

sintering temperature and time) using strontium carbonate (SrCO3) and unalloyed steel scale

(Fe2O3) as starting materials by mechanochemical synthesis method. In experimental studies,

the effect of each production parameter on the phase structure and magnetic properties was

investigated. As a result of these studies, the maximum coercivity value of 5506 Oe was

obtained with production parameters of 1:6 (SrCO3:Fe2O3) stoichiometric ratio, 16 h

mechanochemical synthesizing, 1 h annealing at 975 ° C, and 1 h sintering at the same

temperature.

References

[1] F. Sánchez-De Jesús, A. Bolarín-Miró, C.A. Cortés-Escobedo, R. Valenzuela, S. Ammar, Mechanosynthesis,

crystal structure and magnetic characterization of M-type SrFe12O19, Ceram Int, 40 (2014) 4033-4038.

[2] M. Jean, V. Nachbaur, J. Bran, J.-M. Le Breton, Synthesis and characterization of SrFe12O19 powder

obtained by hydrothermal process, J Alloy Compd, 496 (2010) 306-312.

[3] Z. Ullah, S. Atiq, S. Naseem, Influence of Pb doping on structural, electrical and magnetic properties of Sr-

hexaferrites, J Alloy Compd, 555 (2013) 263-267.

[4] P. Sahu, S.N. Tripathy, R. Pattanayak, R. Muduli, N. Mohapatra, S. Panigrahi, Effect of grain size on electric

transport and magnetic behavior of strontium hexaferrite (SrFe12O19), Applied Physics A, 123 (2016) 3.

22


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-17

Data-driven exploration of new functional materials including superconductors under

high pressure

Yoshihiko Takano,1,2

1 National Institute for Materials Science (NIMS), Tsukuba, Japan

2 Tsukuba Univ., Tsukuba, Japan


High pressure is a promising tool to find new functional materials which cannot

appear under ambient pressure. For example, the discoveries of new high-Tc

superconductivity in H3S at ~200 K and LaHx at ~260K under high pressure were recently

reported. Diamond anvil cell (DAC) is most useful apparatus to generate high pressure over

10GPa. However, the resistivity measurement using DAC is quite difficult because it requires

4-terminal electrodes wiring to a very small sample. To make the resistivity measurement

under pressure easy, we develop the new DAC using superconducting diamond electrodes

which is fabricated on the bottom anvil. We have explored new pressure induced

superconductors using this new DAC.

Data-driven material science (materials informatics, materials genome initiative,

chemometrics) recently brings remarkable results in the field of medicine and macromolecule

and so on. On the other hand, a search for new superconducting materials has been still

conducted through a carpet-bombing type experiment depending on the experience and

inspiration of researchers.

As shown in fig. 1, we have exhaustively searched the candidates of new superconducting

materials using the data-driven method with first-principle calculation as a guideline which is

a specific band structure of “flat band” near fermi energy with small band gap. If the flat band

approaches to the fermi energy, electrical conductivity and Seebeck coefficient would be

enhanced. If the flat band crosses the fermi energy by high pressure, superconductivity would

be appeared due to high density of state (DOS) near the fermi energy. In my presentation, I

will talk about successful demonstration of the discovery of new superconductors under high

pressure by data-driven materials research [1-2].

Fig. 1 Procedure of data-driven materials research

References:

[1] R. Matsumoto et al., Applied Physics Express 11, 093101 (2018).

[2] R. Matsumoto et al., Science and Technology of Advanced Materials, Vol.19, 909, 2018. arXiv:1808.07973.

23


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-18

Revolution in the Aluminium Industry: Scandium

Tolga Depci1, Ersin Bahçeci2

1Iskenderun Technical University, Department of Engineering Sciences, Iskenderun, Hatay, Turkey e-mail:

[email protected] 2Iskenderun Technical University, Department of Metallurgical and Materials Engineering, Iskenderun, Hatay,

Turkey e-mail: [email protected]

Today’s advances in material science have given rise to a new group of metals and elements,

especially Rare earth elements which are great attention. Addition of the small amount of

REE into base metals (Fe, Al, Cu, Zn,…) and ceramics chances drastically the properties of

matter. Among them, Scandium (Sc) is one of them and known as both a rare earth element

and a transition element. Depending on the technological evolution and development,

scandium is a unique and a key component in producing high strength aluminium alloys. It

improves the properties of aluminium alloys and make them better alloys for transportation

applications (weight saving), marine equipments (corrosion), thin wall extrusions (flow rate)

and decrease the application cost (weld ability). Scandium effects the grain refinement during

casting or welding and occurring to Al3Sc dispersoids in the structure, causing the hardening

from Al3Sc particles. Researches related with aluminium alloys alloyed with scandium have

been studied since 1970s. In 2000, ‘scandium effect’ term was introduced by Milman et al.

who prove the positive effect of scandium additions to the chemical and mechanical

properties of aluminium alloys. Significant improvements are observed in the properties of

commercial 5XXX, 7XXX and other high performance alloys with scandium additions. Our

research groups started the foaming and aging of aluminium alloyed with scandium to meet

the growing demand for light products, high strength and high performance applications. The

previous results showed that the addition of scandium increased the foam aluminum strength

by 150 times.

Keywords: Scandium, Aluminum alloys, Al3Sc particles, Rare earth elements



http://tf-metalurji.gazi.edu.tr/?language=en_US

http://tf-metalurji.gazi.edu.tr/?language=en_US

24


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-19

Fabrication of Fe Spinel Nanoparticles using Laser Technologies

H. Santos1, S. Özçelik2, H. Amaveda1, C.J. Borrel1, L. A. Angurel1, G.F. de la Fuente1, B. Özçelik3

1Instituto de Ciencia de Materiales de Aragón, ICMA (CSIC-University of Zaragoza), 50018 Zaragoza, Spain

2Hakkari Universtity, Engineering Faculty, Food Engineering Department, 30000 Hakkari (Turkey)

3 Cukurova University, Faculty of Science&Letters, Dept. of Physics, 01330, Adana, Turkey


Iron-based spinel ferrites have a great attention from the fundamental point of view due to

their physical properties and a broad range of applications [1, 2]. In addition, their availability

as nanoparticles has opened a new range of applications in bioscience [3,4]. Different laser

technologies have been applied to produce nanoparticles of Mn, Ni and Zn ferrite spinels

starting from mixtures of the corresponding precursor oxides. The process has been divided in

two steps. Initially, laser melting methods have been applied to produce spinel monoliths,

particularly taking advantage of the Laser Line Scanning method described by Lennikov et al.

[5] for ceramic superconductors. In order to reduce thermal stresses during the laser treatment,

the process has been performed with a CO2 laser acting on the surface of the sample, when it

is inside a roller kiln, a system that we have called Laser Furnace [6]. In the second step, the

dense monoliths obtained were used as targets for laser ablation, with the aim of obtaining

nanoparticles of these materials. In this case, a short pulse (800 ps) n-IR laser has been used

This presentation will first include descriptions of the Laser Line Scanning methodology, as

well as structural, microstructural and magnetic property characterization of the

correspondingly obtained monoliths. The influence of some laser processing parameters, as

the average irradiance or the processing speed on the microstructure of the samples will be

analyzed. Secondly, it will describe the ablation experiments and the characteristics of the

nanostructured products thus obtained.

Acknowledgements

The authors gratefully acknowledge the financial support from MINECO-AEI-FEDER

(project ENE2017-83669-C4-1-R and MAT2016-79866-R), from PHOBIC2ICE (EU GA

690819) and SPRINT (EU H2020-FET-OPEN/0426) projects and from Gobierno de Aragón,

“Construyendo Europa desde Aragón” (research group T54_17R).

References 1. Z. Yan, J. Gao, Y. Li, M. Zhang, M. Gao, RSC Adv 5 (2015) 92778–92787

2. H.E. Moussaoui, T. Mahfoud, S. Habouti, K. El Maalam, M. Ben Ali, M. Hamedoun, O. Mounkachi, R.

Masrour, E.K. Hlil and A. Benyoussef, J Magn Magn Mater 405 (2016) 181–186

3. D.S. Mathew, R. Juang, Chem Eng J 129 (2007) 51–65

4. K. Elayakumar, A. Manikandan, A. Dinesh, K. Thanrasu, K.K. Raja, R.T. Kumar, Y. Slimani, S.K.

Jaganathan, A. Baykal, J. Magn. Magn. Mater. 478 (2019) 140–147

5. V. Lennikov, B. Özkurt, L.A. Angurel, A. Sotelo, B. Özçelik, G.F. de la Fuente, J. Supercond. Nov. Magn. 26

(2013) 947-952

6. F. Rey-García, F. Gutiérrez-Mora, C.J. Borrel, L.C. Estepa, L.A. Angurel, G.F. de la Fuente, Ceram Inter 44

(2018) 6997-7005


25


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-20

Interband Optical Absorption of Type-II Superlattices Obtained by Pseudo Potantial

Method

K. Akel, M. Hostut, T. Akın and Y. Ergün

We calculated interband optical absorption for type-II superlattice structures (standard and

N-Structure i.e.) for comparison. Pseudo potential technique has been shown as an alternative

to k.p method due to less sophisticated but similar results for MWIR and LWIR atmospheric

bands. This method has been used for understanding optical absorption of Type II superlattice

structures both mid and long wave atmospheric windows. Results were compared with

experimental results. 1-2 ML AlSb inserted GaSb/InAs systems was presented and good

experimental agreement with theory. We also show that InAs-GaSb-GaAs-AlSb-InSb and

their triple and quadrupole compositions can be used to identify electronic (effectife mass for

instance) and optical parameters both intersubband and interband applications.

26


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-21

Y3Fe5O12 Nanoparticles as Efficient Pinning Centers and Temperature dependence of

the Critical Current in YBa2Cu3O7- Nanoparticles

S. Khene

Radiation Physics Laboratory, Physics Department, Badji Mokhtar University,

PO box 12, 23000, Annaba, Algeria

[email protected]

Magnetic measurements are reported in nano-sized YBa2Cu3O7- (YBCO) pellets of 5 mm

diameter and 0.5 mm thickness having different contents of Y3Fe5O12 (YIG) nanoparticles.

The crystal structure and phase composition of YBa2Cu3O7- and Y3Fe5O12 were characterized

by X-ray diffraction (XRD). Magnetization measurements vs. the temperature T and the

applied field H were performed with a conventional magnetometer in the temperature range

4.2 – 110 K and in magnetic fields up to 10 T in order to confirm the obtaining of YBCO and

YIG phases and to study the variation of the critical current JC as a function of T, H and the

added YIG. The field was applied parallel to the pellet axis. The temperature exponential

decay of JC in YBCO nanoparticles has been observed and analyzed in the framework of the

collective and correlated models. A two currents model has been proposed: the low-T domain

would correspond to some interactions which drop very rapidly with T than that controlling

the high temperature domain. The low-T domain behaviour has been attributed to the trapping

effectiveness of the ferromagnetic and superconducting nano domains interfaces. In the high

temperature region, there are many ferromagnetic traps to ensnare a very small number of

vortices leading to a slackening of JC decreasing vs. T and to very low values of JC. Field

dependence of JC of many pellets of YBCO/YIG with different proportions of the added YIG

has shown an optimum improvement of JC for 0.5% of YIG in weight.

Acknowledgment

S. Khene expresses his thanks to Néel Institute of Grenoble (France) for the use of large

scientific facilities.


27


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-22

New material technology on Armor production in Turkey.

Halil Ibrahim Yavuz

National Defense University Turkish Military Academy

(Kara Harp Okulu) Devlet Mah. Kara Harp Okulu Cd.

Ankara / Turkey, 06654

[email protected]

Over the past century, tanks and other armored vehicles on the battlefield have rekindled an

old challenge. Fight against armor and armor. Tanks became an inseparable part of infantry

battles and doctrines with the facilities it provided (Speed, Maneuverability, Armor

Protection, Firepower). In the first stage, the tank doctrine against tank came into question. II.

At the beginning of the World War, we have seen this frequently and experienced it. Then

infantry and commando units also wanted to have a solution against armored vehicles.

Bazooka, Panzerfaust, RPG, LAV etc. many types of rocket rushed to help. As you know,

these systems, working with pit spelling, have not been delayed to develop into a brand new

identity in parallel with the developing technology: Antitank Guided Missiles. Starting with

simple wire guidance, laser, IR and so on. Enriched with many different guidance systems,

even reaching the level of horse and forget the system with many types and origins. They are

abundant in all conflict areas of our time. They are used by every regular or irregular army.

They get effective results. This study was developed to summarize turkey active and passive

armor and developmental technology will be discussed.

28


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-23

Thermal Energy Storage with Phase Change Materials

H.O. Paksoy1, Nurten Şahan1

1Cukurova University, Dept. of Chemistry, 01330, Adana, Turkey


Increasing energy demand of the world, limitation of non-renewable resources and

environmental problems tend to raise importance of renewables and energy saving

technologies. Thermal energy storage (TES) is considered as a key low-carbon technology.

By matching the supply and demand TES can enable continuous and efficient use of

renewables for heating and cooling. Discovering novel TES materials to increase energy

efficiency and provide sustainability for renewable applications has become more important

than ever.

Phase Change Materials (PCM) with high storage capacity and isothermal behaviour can be

used in various applications. One such application is thermotropic materials [1] which can

provide passive overheat protection for polymer solar thermal collectors. Figure 1 shows

fabrication of microencapsulated stearic acid as PCM for thermotropic material production.

The phase-change range was between 66-82°C and size range of capsules were under 500 nm.

Fig. 1: Encapsulation process of phase change materials

References

1. Sahan et al., Solar Energy, 184, 466-476 (2019).


29


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-24

Energy Efficient Ultraconductive Wires

Mehmet Ertuğrul

Ataturk University, Engineering Faculty

Department of Electrical and Electronics Engineering

25240 Erzurum, TURKEY

Considering the increasing power need, it would be impossible to transmit dozens of GW

power using the existing transmission lines due to the current carrying limitation of the metals

used in transmission lines. On the other hand, development of energy efficient materials for

the power transmission lines, electrical machines, transformers and etc. are important as much

as diversity and renewability of energy resources. Hence, it is a must to develop new materials

for power transmission lines. It is known that new generation electrical materials on which the

studies have been heavily performed in recent years have demonstrated close or better

performances than superconductors in certain aspects even though they are not

superconductors. One potential approach to increase ampacity and decrease electrical

resistivity is the incorporation of carbon nanotubes into metal. In present work, we developed

a unique method to obtain metal-CNT composite to get high ampacity ultraconductive wire.

30


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-25

Defect Engineering in Development of Low Thermal Conductivity Materials

Wei Pan State Key Lab of New Ceramics and Fine Processing, School of materials science and engineering,

Tsinghua University, Beijing, China, [email protected]

Increasing thermal efficiency and lower emissions require gas turbine designers to further

increase the combustion temperature that leads to the high temperature components such as

combustion chambers, blade and vanes surfaces face more rigorous conditions. Therefore,

there is urgent demand to develop new ceramic coatings with even lower thermal

conductivity, higher stability and durability than currently used thermal barrier coatings

coating on the surface of high temperature alloy components.

Defect engineering has attracted much attention in seeking better low thermal conductivity

materials since lattice defects play a crucial role in phonon scattering and thermal

conductivity reduction. Oxygen vacancies and substitutions are proven to be the most

effective, while the accompanying lattice distortion is also of great importance. In this talk,

recent advances of reducing the thermal conductivity of potential thermal barrier coating

materials by defect engineering are comprehensively reviewed. Effects of the mass and size

mismatch between the defects and the host lattice are quantitatively estimated and

unconventional thermal conductivity reduction caused by the lattice distortions is also

introduced. Finally, challenges and potential opportunities are briefly assessed to further

minimize the thermal conductivity of thermal barrier coatings materials in the future.

In this presentation, effects of macro defects on the heat transfer in porous ceramics are also

talked including the characterization method as well as modeling.

References:

[1] Wan CL, W. Pan, Xu Q, Qin YX, Wang JD, Qu ZX, Fang MH, Effect of point defects on the thermal

transport properties of (LaxGd1-x )2Zr2O7 : Experiment and theoretical model. Phys. Rev. B 74, 144109-1~9

(2006).

[2] Wan CL, Qu ZX, He H, Luan D, W. Pan, Ultralow thermal conductivity in highly anion-defective

aluminates, Phys. Rev. Lett. 101, 085901 (2008).

[3] J. Feng, C. Wan, B. Xiao, R. Zhou, W. Pan, D. R. Clarke, Calculation of the thermal conductivity of

R2SrAl2O7 (R = La, Nd, Sm, Eu, Gd, Dy), Phy. Rew. B, 84, 024302 (2011)

[4] ZX Qu, Taylor Sparks, W. Pan, and David R. Clarke, Thermal conductivity of the gadolinium calcium silicate

apatites: Effect of different point defect types, Acta Mater. 59 (2011) 3841–3850.

[5] CL Wan, W Zhang, YF Wang, ZX Qu, AB Du, RF Wu, W. Pan, Glasslike thermal conductivity in ytterbium

doped lanthanum zirconate pyrochlore, Acta Mater. 58 (2010) 6166– 6172.

[6] XR Ren, W Pan, Mechanical properties of high temperature degraded yttria stabilized zirconia, Acta Mater.

69 (2014) 397–406.

[7] J. Feng, B. Xiao, R. Zhou, W. Pan, Anisotropy in elasticity and thermal conductivity of monazite-type REPO4

(RE = La, Ce, Nd, Sm, Eu and Gd) from first-principles calculations, Acta Mater. 61 (2013) 7364–7383

[8] M Zhao, W. Pan, Effect of lattice defects on thermal conductivity of Ti-doped, Y2O3-stabilized ZrO2, Acta

Mater. 61 (2013) 5496–5503.

[9] CL Wan, ZX Qu, AB Du, W. Pan, Influence of B site substituent Ti on structure and thermophysical

properties of A2B2O7-type pyrochlore Gd2Zr2O7, Acta Mater., 57 (2009) 4782–4789.

[10] ZX Qu, CL Wan, W. Pan, Thermophysical properties of rare-earth stannates: Effect of Pyrochlore Structure,

Acta Mater. 60 (2012) 2939–2949.


31


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-26

Novel Magnetism Derived from Heteroleptic Coordination in Oxyhydrides

Hiroshi Kageyama1

1Kyoto University, Graduate School of Engineering, Kyoto 615-8581,

Japan Corresponding Author: [email protected]

Mixed anion compounds, which contain several different anions, began to draw attention as

game-changing inorganic materials. Since, compared with conventional inorganic

compounds such as oxides, mixed-anion compounds may exhibit unique coordination and

resultant extended structures, from which fundamentally different chemical and physical

property may emerge [1]. My talk aims to describe the current status and scope as well as

outline future prospects and challenges surrounding oxyhydride (oxide-hydride)

compounds. Our recent studies demonstrate that the lability of hydride allows titanium

oxyhydrides to act as a precursor for topochemical anion exchange reaction [2] and as a

catalyst for ammonia synthesis [3]. The size flexibility of hydride and the absence of p

orbitals in the valence shell are also important to provide distinct magnetic interactions (see

Figure 1) and resultant properties [4, 5].

Figure 1. Superexchange pathway via oxide (upper) and hydride (lower) anions

References

1. H. Kageyama et al., Nat. Commun. 9, 772 (2018).

2. T. Yajima et al., Nat. Chem. 7, 1017 (2015)

3. Y. Kobayashi et al., J. Am. Chem. Soc. 139, 18240 (2017).

4. T. Yamamoto et al., Nat Commun. 8, 1217 (2017).

5. K. Higashi et al., in preparation


32


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-27

Functional Superconductor/Ferromagnet nanostructures for superconducting

spintronics

Sidorenko Anatolie

Director of Institute of Electronic Engineering and Nanotechnologies,

Academiei 3/3,Chisinau MD2028, Moldova

Last decade there is an intensive study of superconductor-ferromagnet (S/F) nanostructures all

over the world, motivated by rapid increasing their applications in superconducting

electronics - spintronics. Theory of S/F hybrid nanostructures with two and more

ferromagnetic layers predicts generation of a non-uniform superconductivity, a long-range

odd-in-frequency triplet pairing at non-collinear alignment (NCA) of the F-layers

magnetizations.

Using the ideas of the superconducting triplet spin-valve we have fabricated functional

nanostructures Co/CoOx/Cu41Ni59/Nb/ were triplet pairing with switching from normal to

superconducting state takes place. The resistance of the samples as a function of an external

magnetic field shows that the system is superconducting at the collinear alignment of the

Cu41Ni59 and Co layers magnetic moments, but switches to the normal conducting state at the

NCA configuration. Upon cycling the in-plane magnetic field and keeping temperature close

to the superconducting transition, a memory effect has been detected, The fabricated S/F

functional nanostructures can serve as the rapid operating switching element of

superconducting electronics and memory element MRAM for novel computers generation.

Acknowledgement: Research is supported by the HORIZON-2020 Twinning project

“SPINTECH”.

33


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

I-28

Real and Potential Uses of Superconductors in Various Applications

İ. Belenli1, H. Yetiş1, M. Akdoğan1, F. Karaboğa2, A.T. Ülgen3 1Bolu Abant İzzet Baysal Univ, Dept Phys, TR-14030 Bolu, Turkey

2Bolu Abant İzzet Baysal Univ, Mehmet Tanrıkulu Vocat Sch Hlth Serv, TR-14300 Bolu, Turkey 3Şırnak Univ, Dept Elect & Elect Eng, TR-73000 Şırnak, Turkey


Inevitability of cooling to very low temperatures for any superconductive component to

function properly sets up a severe obstacle towards widespread applications. Even though

cryocooling technology gains impressive progress and makes cooling process less

problematic-more efficient, thermodynamics does not allow cutting the expenses of cooling

below certain limit. Discovery of higher critical temperature superconductors made

substantial contribution at low field applications at around liquid nitrogen temperature, on the

other hand applications which involve higher magnetic fields still depend on cryogenic

cooling down to liquid helium temperature.

These very facts tend to keep application of superconductors limited to the cases where all

other non-superconducting solutions are not applicable or do not provide desired satisfaction.

First and largest example is medical device of magnetic resonance imaging (MR) units. Other

medical examples include magnetoencephalography, particle therapy, magnetic drug delivery

and magnetic surgery, mostly in the research and development or preliminary application

stages.

Besides medical field, superconductors find their ways to application in the fields of

transportation, energy, defense, industry, science, research and development. Every

application chooses the most suitable superconductor depending on the requirements of the

usage in terms of magnitude of the magnetic field involved, value of the resistanceless

supercurrent and amount of cryogenic cooling power needed.


34


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

ORAL PRESANTATIONS

35


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-01

Synthesis, Structural and Magnetic Properties of CoxM1-x (M= Cr, Pd, Fe) Thin Films

Fabricated by Physical Vapor Deposition Under Vacuum

A. KHARMOUCHE

Laboratory of Surfaces and Interfaces Studies of Solid Materials (LESIMS)

Department of Physics, Faculty of Technology, Ferhat Abbas Sétif1 University,

Sétif, Algeria

[email protected]

Physical vapor deposition under a pressure of 10-7 mbar has been used to synthesize thin films

of cobalt several different substrates within a home-made evaporation chamber. The incident

atomic flux reaches the substrates under normal and oblique incidences. The film thickness

ranges from a few nm to 400 nm. A hexagonal close packed structure with <0001> preferred

orientation has been observed for all polycrystalline films. The crystallite size increases with

the thickness increase. The thinnest films are under a compressive stress and the thickest films

exhibit magnetic stripes domains observed by means of magnetic force microscopy technique.

The magnetic anisotropy factors have been computed using Brillouin Light Scattering

measurements(Fig.1).

Fig. 1: Example of BLS spectrum for applied magnetic field intensity H = 5 kOe,

References [1] Y. Endo, O. Kitakami, S. Okamoto, and Y. Shimada, Appl. Phys.Lett. 77, 1689 (2000)

[2] A. Kharmouche, S.-M. Chérif, Y. Roussigné, G. Schmerber, Appl. Surf. Sci. 255 (2009) 6173–6178.

[3] A. Kharmouche, S.-M. Chérif, G. Schmerber, and A. Bourzami, J. Magn. Magn. Mater. 310(2007) 152.

[4] A. Kharmouche, J. Magn. Magn. Mater. 327(2013) 91.

36


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-02

The Production Optimization of EN AA 7075 Aluminium

A. Ekiz1, T. Yıldız1, M. Gunes2 M. Ozcan1, D. Izcankurtaran1, V. Kayan1, B. Tunca1

1Zahit Aluminyum San. Ve Tic. A.S, Adana, Turkey 2Adana Alparslan Turkes Bilim ve Teknoloji University, Dept. of Materials Engineering 01250, Adana, Turkey


The selection of materials which is determined by the criteria such as lightness, strength, cost

and efficiency has become more important in the production sector. Aluminium and its alloys

proceed to attain a place in industry with their increasing usage thanks to their lightness,

strength, easy formability and superior mechanical properties. Especially Al-Mg-Zn 7075

aluminium alloy systems which belongs to 7XXX series are used in aeronautical, automotive

and defense industry as a qualified product. Firstly, the prescription that contains chemical

composition will be prepared in order to casting of 7075 aluminium alloy billets. The

mechanical and physical properties of all crystalline metallic materials can be controlled and

determined by several factors, such as chemical composition, process of metallurgy as well as

heat treatment. Therefore, casting parameters, molten metal homogenization and heat

treatment play a critical role within this scope. The billets which is obtained as a result of

casting process will be subjected to homogenization heat treatment. The temperature and time

parameters influence uniformly distribution of particles, quality of extrusion and the surface

quality and mechanical properties of the final product. Then the extrusion parameters will be

determined for billets which is obtained after casting and homogenization heat treatment.

Finally, 7075 aluminium alloy profile’s mechanical properties will be tested within the scope

of this study.

References 1. L. J-F, P. Z-W, L. C-X, J. Z-Q, J. Z-Q, C. W-J, Z. Z-Q, Trans. of Nonferrous Met. Soc. China, 18(2008).

2. M.S., Archives of Civil and Mechanical Engineering, (2018)

3. S.B.P, D.S.K., C.L.G., Procedia Manufacturing, 20(2018)

37


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-03

Structural, optical and magnetic properties of Cu/Ni co-doped ZnO Films

Ali Gungor1, Dogan Akcan2, Bestenur Yalcin3, Kenan Senturk4, Ibrahim Ertugrul Yalcin5,

Mehmet Can Alphan6, Lutfi Arda7

1Bahcesehir University, Faculty of Medicine, Department of Biophysics, 34734, Kadikoy, Istanbul, Turkey

2Bahcesehir University, Department of Mathematics Engineering, 34353, Istanbul, Turkey 3Bahcesehir University, Department of Biomedical Engineering, 34353, Istanbul, Turkey

4Istanbul Gelisim University, Department of Mechatronics Engineering, 34310, Istanbul, Turkey 5Bahcesehir University, Department of Civil Engineering, 34353, Istanbul, Turkey

6Bahcesehir University, Department of Electrical and Electronics Engineering, 34353, Istanbul, Turkey 7Bahcesehir University, Department of Mechatronics Engineering, 34353, Istanbul, Turkey


Zn0.99-xCu0.01NixO (x=0.0, 0.01, 0.02, 0.04, and 0.05) solutions have been synthesized by the

sol-gel technique using Zinc acetate dihydrate (C4H10O6Zn), Cu and Ni acetate which were

dissolved in methanol and acetylacetone. Cu/Ni co-doped ZnO nanoparticles were obtained

from solutions to find phase and crystal structure. Cu/Ni co-doped ZnO films have been

deposited onto glass substrate by using sol-gel dip coating system. Obtained nanoparticles and

films were annealed at 600°C temperature for 30 minutes to find doping ratio effect on

structural, optical, and magnetic properties. The crystal structures of the Cu/Ni co-doped ZnO

nanoparticles and films were characterized using 2- x-ray diffraction (XRD). The surface

morphologies and microstructure of all samples were investigated by SEM. Optical

properties of Zn0.99-xCu0.01NixO thin films obtained by using PG Instruments UV-Vis-NIR

spectrophotometer in 190 – 1100nm range and optical band gap is obtained. External

magnetic field-dependent magnetization behavior of samples was defined by Quantum Design

Physical Properties Measurement System (PPMS) between -15 and +15 kOe magnetic field.

The particle size, surface morphology, film thickness, optical, and magnetic properties of

nanoparticles and the thin films with different doping ratios are presented.


38


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-04

The Magnetic Phase Transition and Hysteresis Behavior of Fe2MnB, Fe2CrB and

Fe2TiB Heusler Alloys

A. Duran1

1Kütahya Dumlupinar University, Dept. of Electronics and Automation, 43020, Kütahya, Turkey


The magnetic phase transition and hysteresis behavior of Fe2MnB, Fe2CrB and Fe2TiB

Heusler alloys were modelled and investigated theoretically by employing Kaneyoshi

approximation in the frame work of effective field theory (EFT). To model these Heusler

alloys, we assumed that the alloys were in the same L21 structure [1] and the signs of their

exchange parameters were defined according to the signs of magnetic moments of the

components of the alloys in Ref.[1]. The thermal and external magnetic field variations of

magnetizations of the alloys were calculated and plotted. It was obtained that these alloys

exhibit Q-type, P-type and N-type behavior in ferrimagnetism, respectively, and Fe2TiB

Heusler alloy has the lowest Curie temperature while the Curie temperature of Fe2MnB

Heusler alloy is the highest. Furthermore, Fe2MnB, Fe2CrB and Fe2TiB at a very low

temperature exhibit the magnetic hysteresis behavior of three-step, four-step and multi-step,

respectively. These Heusler alloys, which have the same crystal structure, can be said that the

differences in both magnetic phase transitions and magnetic hysteresis behavior are due to the

difference in exchange interactions (ferromagnetic or antiferromagnetic) in their crystal

structures. Finally, the obtained results were compared with the available experimental and

theoretical results.

Fig. 1: The L21 crystal structure of Fe2YB [1]. Fig. 2: The thermal variations of magnetizations of Fe2YB.

References

1. S.T. Li, Z. Ren, H.Z. Luo, X.H. Zhang, Y. Liu, Physica B 407, 1275–1278 (2012).

Unit cell of Fe2YB

B1 B2 Y1 Y2 Fe

j4

j3

j2

Y (Mn, Cr , Ti)

39


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-05

Specific Heat Capacity Behaviours of P/M Distaloy AE Alloy Compacts

Ayşe Nur Acar1,2, Abdul Kadir Ekşi2, Ahmet Ekicibil3

1Cukurova University, Ceyhan Engineering Faculty, Mechanical Engineering Department, Ceyhan, Adana,

Turkey 2Cukurova University, Engineering Faculty, Mechanical Engineering Department, Sarıçam, Adana,

Turkey 3Cukurova University, Sciences and Letters Faculty, Physics Department, Sarıçam, Adana, Turkey

Corresponding Author: Ayşe Nur Acar; [email protected]

The alloying techniques consist of pre-alloyed, pre-mixed and diffusion-bonded powders.

Depending on these techniques; microstructures of steel alloys which are produced via

powder metallurgy (P/M) method change. Distaloy AE alloy used in this study is type of

diffusion-bonded alloy consisting of Fe, Ni and Mo alloying elements and has high strength

sintered components [1-5].

In this study; distaloy AE powder pressed on the 400 and 600 MPa pressures via die

pressing technique. The compacted distaloy AE alloy samples sintered at 1200°C for 2 hrs

under N2 atmosphere. Sintered distaloy AE alloy samples cut to down small pieces. Specific

heat capacity behaviors of these small alloy pieces have been examined at temperature

ranging from 0 to 600 °C via heat flux type Differential Scanning Calorimeter (DCS).

Specific heat capacity measurements supported by SEM images, EDS spectrums and XRD

patterns of these alloy samples.

Keywords: Powder metallurgy, distaloy AE alloy, specific heat capacity, structure

Acknowledgement: The authors are greatly thankful to Cukurova University research

funding (FBA-2018-11074)

References: 1. Abdoos H., Khorsand H., Shahani A.R., Materials and Design 30, 1026–1031, (2009).

2. James WB, OtBrien RC., Progress in powder Metallurgy. Princeton NJ: MPIF; 1986.

3. Alzati L, Bergmark A, Andersson J. Fatigue Performance of PM Steel in Assintered State. Presented at PMAI

conference, Mumbai, India, February; 2005.

4. Lindskog P., Powder Metallurgy 56:5, 351-361, (2013).

5.Öksüz K.E., Kumruoğlu L.C., Tur O., (5th International Biennial Conference on Ultrafine Grained and

Nanostructured Materials, UFGNSM15), 11-12 November 2015, Tehran-Iran, Procedia Materials Science 11, 49

– 54, (2015)


40


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-06

Magnetic Properties and Irreversibility Field Line of TSMG Y123

B. Çakır1,2*, Ş. Duman1, A. Aydıner2

1 Vocational Health High School, Artvin Çoruh University, Artvin 08000, Turkey 2 Department of Physics, Faculty of Sciences, Karadeniz Technical University,

Trabzon 61080, Turkey


The magnetoresistance and irreversibility field were studied for Y123 fabricated by a top–

seed–melt–growth (TSMG) method. YBCO samples were investigated by magnetoresistivity

(ρ–T) measurements in dc magnetic fields (parallel to the c-axis) up to 5 T. The critical

temperatures of the sample of Tc,on= 94.01 K and Tc0= 93.33 K and the width of

superconducting transition of T = 0.68 K were obtained. Irreversibility fields (Hirr) and

upper critical fields (Hc2) were obtained using 10 and 90% criteria of the normal-state

resistivity value from ρ–T curves. The irreversibility field line was obtained and successfully

fitted as a function of temperature using the formula: Hirr ∼ (1−Tirr(H)/Tirr(0))n. The fitting

results to giant flux creep and vortex glass models were discussed.

Acknowledgments: This study was supported by Artvin Çoruh University research grant

(BAP 2017.M80.02.02).

41


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-07

ZnO Nanoparticles: Effect of Cd Doping on Structural and Biological Properties

Bestenur Yalçın1, Lutfi Arda2

1Bahcesehir University, Department of Biomedical Engineering, 34353, Istanbul, Turkey

2Bahcesehir University, Department of Mechatronics Engineering, 34353, Istanbul, Turkey


The objective of this study is to synthesize ZnO and cadmium doped ZnO (Zn1-xCdxO)

nanoparticles to characterize their structures and to investigate their photocatalytic and

biological properties. ZnO and Zn1-xCdxO nanoparticles (NPs) were synthesized by the sol-gel

method using zinc acetate dihydrate and cadmium acetate dihydrate as precursors. Methanol

and monoethanolamine were used as solvent and sol stabilizer, respectively [1-2]. Structural

and morphological characterizations of Zn1-xCdxO nanoparticles were studied by using XRD

and SEM-EDX, respectively. Photocatalytic activities of ZnO and Zn1-xCdxO nanoparticles

were investigated by degradation of crystal violet (CV) under 254 nm irradiation. The kinetics

of CV photo degradation was described by first order kinetics. decreasing absorption band

intensities at 594 nm indicated that CV has been degraded by both ZnO and Cd doped ZnO

photocatalysts. The characteristic band at 594 nm disappeared after 1440mins under the effect

of UV irradiation indicating the complete degradation of CV. Hemolysis assay was performed

using human erythrocytes to investigate the biological properties of NPs [3]. Results showed

the presence of an inverse proportionality between cadmium concentration and percent

hemolysis values (Fig. 1).

Fig 1: Hemolysis ratios of human erythrocytes after incubation with ZnO and Zn1-xCdxO nanoparticles.

References 1. Ciciliati, M. A., Silva, M. F., Fernandes, D. M., de Melo, M. A., Hechenleitner, A. A. W., Pineda, E. A.

Materials Letters, 159, 84-86, (2015).

2. Heiba, Z. K., Arda, L., Mohamed, M. B., Al-Jalali, M. A., Dogan, N. Journal of superconductivity and

novel magnetism, 26(11), 3299-3304, (2013).

3. Yasuhara, K., Kuroda, K. Chinese Chemical Letters, 26(4), 479-484, (2015).

42


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-08

Layer-by-Layer Self-Assembled Peptide Nanoparticles as Gene Carrier in

Cancer Therapy

Betül Bozdoğan1, Öznur Akbal2, Ekin Çelik3, Emir Baki Denkbaş4

1 Aksaray University, Art and Science Faculty, Chemistry Department, 68100, Aksaray, Turkey. 2 Hacettepe University, Advanced Technologies Application and Research Center, 06800, Ankara, Turkey.

3 Kırşehir Ahi Evran University, Faculty of Medicine, Medical Biology Department, 40100, Kırşehir, Turkey. 4 Başkent University, Faculty of Engineering, Biomedical Engineering Department, 06530, Ankara, Turkey.


All complex and functional constituents of nature (e.g., DNA double-helix, protein folding)

result from self-assembly (SA) of molecules in a thermodynamically stable manner. SA refers

to any spontaneous formation of a specific organization from disordered particular units via

specific and local interactions between them under defined conditions without external

intervention [1]. Layer-by-layer (LbL) SA strategy involves alternately coating the planar or

colloidal surfaces with complementary compounds and is used as a powerful method for the

production of functional nanomaterials [2]. The nanoscale domain control of the architecture

and composition makes LbL SA especially attractive for the biomaterial field to modify the

surface topography and load pharmaceuticals. The main group of molecules that are capable

of self-assembly is proteins. Biodegradable, biocompatible and chemically modifiable

amyloid derived diphenylalanine (FF) dipeptide and derivatives are a hot topic in self-

assembly [3].

In this study, FF amide (FFA), a derivative of FF, have been used to fabricate the self-

assembled nanoparticles as gene carriers to be used in gene silencing applications. Regarding

the results of the study, FFANP nanoparticles were shown to be more stable and succeeded as

gene carriers for breast cancer gene therapy. The LbL SA have been monitored successful

with zeta-potential measurement and SEM analysis. In brief, FFANPs have been coated with

the poly-L-lysine (PLL) which is cationic polyaminoacid as the first layer. The nanoparticles

which became cationic after PLL layering have been interacted with polyanionic siRNA as

the second layer for forming peptide-siRNA complex (FFANP-PLL/siRNA). Nanoparticles

have been further coated with PLL one more time, as a third layer (FFANP-

PLL/siRNA/PLL). The nanoparticles have been tested as siRNA carriers for silencing of

HER2 gene which promotes the growth of the breast cancer cells. FFANP-PLL/siRNA/PLL

nanoparticles are better carriers compared to FFANP-PLL/siRNA nanoparticles by the results

of real-time PCR and immunocytochemistry analysis. It was concluded that the PLL layer as

third and last layer enhance the uptake of nanoparticle-siRNA complex because of cationic

character and protect the complex from nucleases. Overall, in this study, FFANP-

PLL/siRNA/PLL nanoparticles are shown to be promising biocompatible and biodegradable

nanocarriers for gene silencing therapies.

References 1. R.J. Gillams, and T.Z. Jia, Life (Basel) 8(2), 19 (2018)

2. H.H. Gatzen, V. Saile, and J. Leuthold, Micro and Nano Fabrication: Tools and Processes (Springer, Berlin,

2015).

3. M.S. Ekiz, G. Cinar, M. A. Khalily, M.O. Güler, Nanotechnology 27(40), 402002 (2016).


43


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-09

Levitation Force Efficiencies of Bulk MgB2 for Different Permanent Magnetic

Guideways

B. Savaskan1, M. Abdioglu2, K. Ozturk3

1Karadeniz Technical University, Faculty of Technology, Energy Systems Engineering, 61800, Trabzon, Turkey 2Bayburt University, Faculty of Education, Department of Elementary Science, 69000, Bayburt, Turkey

3Karadeniz Technical University, Faculty of Science, Department of Physics, 61080, Trabzon, Turkey


Magnesium diboride (MgB2) bulk material can provide a highly compact source of magnetic

field when magnetized like high temperature superconducting bulks ((RE)BCO, RE=rare

earth). The advantages of MgB2 bulks are; relatively low fabrication costs, shorter processing

time, long coherence length, weak-link free at grain boundaries, light weight and also fewer

mechanical problems compared to (RE)BCO bulks [1]. Owing to these benefits, there have

already been many recent studies MgB2 based magnets which are expected to be applicable in

magnetically levitated trains (Maglev). The magnetic levitation force, result from the

interaction between superconductors (SC) and permanent magnetic guideway (PMG) of

Maglev systems are related to critical current density of SC, maximum field and field gradient

of PMG, measurement temperature, cooling height (CH), measurement height (MH), etc [2].

In this study, the magnetic levitation force of two types of PMG arrangements, one of them is

“Conventional PMG” the second one is “Halbach PMG”, were investigated in different

cooling heights (CH=10, 20 and 70 mm) and measurement temperatures (T= 37, 33 K) to

enhance levitation force properties of the superconducting levitation and so Maglev system.

The magnetic levitation force of between the bulk MgB2 and the Halbach and conventional

arrangements in different CHs is the first time investigated experimentally.

0 10 20 30 40 50 60 70 80-3

0

3

6

9

12

15

18

20 20

y

z

x

0

PMG16

Levita

tion

Fo

rce

, F

z (

N)

Vertical Distance, z (mm)

CH=10 mm

CH=20 mm

CH=70 mm

(a) T=37 K, ZFC

Conventional PMG

0 10 20 30 40 50 60 70 80

-3

0

3

6

9

12

15

18

30

PMG 7

30 20 30 20 30

z

0

x

y

(b) T=37 K, ZFC

Halbach PMG

Levitation F

orc

e, F

z (

N)


CH=10 mm

CH=20 mm

CH=70 mm

0 10 20 30 40 50 60 70 80

-6

-3

0

3

6

9

12

15

18

21

24

27

30

30

PMG 7

30 20 30 20 30

z

0

x

y

Levita

tion

Fo

rce

, F

z (

N)


CH=10 mm

CH=20 mm

CH=70 mm

(c) T=33 K, ZFC

Halbach PMG

Fig. 1: Levitation force comparison of two different PMGs in different cooling heights at 37 and 33 K.

References 1. A. G. Bhagurkar, A Yamamoto, L. Anguilano, A. R. Dennis, J. H. Durell, N. H. Babu, D. A. Cardwell,

Supercond. Sci. Technol. 29, 035008 (2016).

2. M. Abdioglu, K. Ozturk, H. Gedikli, M. Ekici, A. Cansız, Journal Alloy and Compounds 630, 260-265

(2015).


44


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-10

Effect of Temperature and Film Thickness on Structural and Mechanical

Properties of Zn0.90Cu0.01Mg0.05O Thin Films

C. Ipek1, I. Topcu1, M. Tosun2, T. Baytak3, O. Bulut3, L. Arda4, S. Ataoglu3

1Alaaddin Keykubat University, Faculty of Rafet Kayıs Engineering,

Alanya, Antalya, Turkey 2Istanbul Technical University, Faculty of Mechanical Engineering,

Mechanical Engineering Department, 34437, Gumussuyu, Istanbul, Turkey 3Istanbul Technical University, Faculty of Civil Engineering,

Civil Engineering Department, 34469, Maslak, Istanbul, Turkey 4Bahcesehir University, Faculty of Engineering and Natural Sciences, Department of Mechatronics Engineering,

34349 Besiktas, Istanbul, Turkey


Zn0.94Cu0.01Mg0.05O thin films were synthesized by the sol-gel technique. The structure,

microstructure, and mechanical and photoluminescence properties were investigated as a

function of temperature and film thickness. Zn0.90Cu0.05Mg0.05O thin films were coated on a

glass substrate using the sol-gel dip-coating method. Then, the thin films were annealed at

various temperature (500, 550 and 600C) for 30 min under air. X-ray diffraction of the

Cu/Mg doped thin films showed that all samples had ZnO wurtzite hexagonal structure.

Photoluminescence properties were measured by using the Agilent Cary Eclipse Fluorescence

Spectrophotometer. The surface morphologies and microstructure of all samples were

characterized by using Scanning Electron Microscope (SEM). Although the surface

morphology of the Zn0.90Cu0.05Mg0.05O thin film was found to be without cracks, dense,

homogeneous and pinhole-free. The effects of temperature and film thickness on stress in

Zn0.90Cu0.05Mg0.05O thin films were theoretically analyzed to see whether there were cracks in

thin-film thickness and substrate. The relation between particle size, surface morphology, film

thicknesses, and photoluminescence properties and calculated stress are presented.

Keywords: ZnO, Residual stress, Sol-gel, Thin films


45


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14-19 October 2019

ADANA, TURKEY

O-11

Structural and ESR properties of Cu-doped ZnO nanoparticles

C. Boyraz1, A. Guler2, P. Aksu3, L. Arda4, E. Aygül5

1Marmara University, Faculty of Technology, Department of Mechanical Engineering, 34722 Goztepe, Istanbul,

Turkey 2Marmara University, Ataturk Faculty of Education, Department of Computer Education and Instructional

Technologies, 34722 Goztepe, Istanbul, Turkey 3Gebze Technical Unversity, Institute of Nanotechnology, Gebze/Kocaeli-Turkey

4Bahcesehir University, Department of Mechatronics Engineering, 34353, Istanbul, Turkey 5Marmara University, Faculty of Technology, Department of Mechatronics Engineering, 34722 Goztepe,

Istanbul, Turkey


Detailed surface morphology, structural phases, and electron spin resonance (ESR)

characteristics of Zn1-xCuxO nanoparticles (x=0.01, 0.02, 0.03, 0.04, 0.05, 0.06) were

presented. The optimum annealing temperature of the compositions synthesized by sol-gel

method was revealed as (600 0C) and the weight loss for the best sample was clarified using

differential thermal analysis (DTA), and thermo gravimetric analysis (TG) respectively. The

phases of the samples were defined as single with ZnO wurtzite hexagonal structure and

matched by Rietveld analysis for Zn0.98Cu0.02O sample by the help of X-ray diffraction (XRD)

technique. Shape and particle size measurements were performed by scanning electron

microscope (SEM) technique. H (G) and g-values were calculated and correlated by ESR

measurements for all compositions.


46


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ADANA, TURKEY

O-12

Effect of Milling Time on the Magnetic Properties of SrFe12O19 Powders Produced by

Mechanochemical Synthesis

D.D. Cakil1, K. Icin1, S. Oztürk1

1Karadeniz Technical University, Dept. of Metallurgical and Materials Engineering, 61080, Trabzon, Turkey


In this study; the production of SrFe12O19 permanent magnets by mechanochemical synthesis

[1] and the effect of particle size on magnetic properties were investigated. The scale which is

known as a waste material in steel production was used as iron source and strontium

carbonate was used as strontium source in the experimental studies. The strontium carbonate

(SrCO3) and the scale (Fe2O3) were prepared with 1: 6 stoichiometric ratio and the mixture

were subjected to mechanochemical synthesizing process by high energy ball milling

apparatus from 20 minutes to 32 hours in order to determine the effects of the particle size on

the Sr-hexaferrite magnets [2,3]. Surface area measurements (BET) were performed to

determine the effect of synthesis times on grain sizes. It was found that the specific surface

area of SrFe12O19 powders obtained by the synthesis of strontium carbonate and the scale for

20 minutes was 0.53 m2/g and this value increased to 8.74 m2/g with 32 hours milling time. It

was determined that the powder sizes decreased with increasing milling time. The surface

areas of the Sr-hexaferrite powders which were subjected to 20 min, 1 h, 2 h, 4 h, 8 h, 16 h,

and 32 h mechanochemical synthesizing were obtained as 0.53 m2/g, 0.93 m2/g, 1.102 m2/g,

1.13 m2/g, 4.02 m2/g, 6.08 m2/g, and 8.74 m2/g, respectively. The X-ray diffractometry (XRD)

analysis was used to determine whether the mechanochemical transformation between the

scale and the strontium carbonate was realized in the mechanochemical synthesis process, to

identify the phases formed in the structure and to determine the changes in phase structure

with changing grinding time. The Fe2O3 and SrFe12O19 phases were observed in XRD patterns

of powders milled between 20 minutes and 32 hours. The largest SrFe12O19 peak was seen at

45° scanning angle for16 h synthesized powders. The intensity of Fe2O3 phases in XRD

patterns decreased or even disappeared with increasing milling time. The effect of powder

size variation with milling time on the magnetic properties (coercivity, magnetic saturation,

permanent magnetization) was investigated with the vibrating sample magnetometer (VSM)

apparatus under 1 T magnetic field. From the results obtained, it was found that the coercivity

did not increase significantly up to 2 h milling time and increased beyond this time. The

magnetic saturation (Ms) and permanent magnetism (Mr) values were found to increase with

increasing milling time. The coercivity values of 20 min, 1 h, 2 h, 4 hours, 8 h, 16 h, and 32 h

milling times were obtained as 3.7 kOe, 3.6 kOe, 3.4 kOe, 4.8 kOe, 4 7 Oe, 5.5 kOe, and 5.4

kOe, respectively. The Ms and Mr values for 20 min, 1 h, 2 h, 4 hours, 8 h, 16 h, and 32 h

milling times were measured as 11, 14, 16, 17, 15, 28, and 30 emu/g, and 19, 22, 27, 28, 24,

47, and 49 emu/g, respectively.

References

1. Tsuzuki, T. ve McCormick, P.G., Mechanochemical synthesis of nanoparticles, Journal of Materials

Science, 39,16 (2004) 5143-5146.

2. Jalli, J., Hong, Y., Gee, S., Bae, S., Lee, J., Sur, J.C., Abo, G.S., Lyle, A., Lee, S., Lee, H. ve Mewes,

T., Magnetic and Microwave Properties of Sm-Doped SrFe12O19 Single Crystals, Ieee Transactions on

Magnetics, 44,11 (2008) 2978-2981.

3. Kong, L.B., Zhang, T.S., Ma, J. ve Boey, F., Progress in synthesis of ferroelectric ceramic materials via

high-energy mechanochemical technique, Progress in Materials Science, 53,2 (2008) 207-322.


47


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ADANA, TURKEY

O-13

Structure optical and biological properties of Mn/Cu co-doped ZnO nanoparticles

Doğan Akcan1, L.utfi Arda2

1Bahcesehir University, Department of Mathematics Engineering, 34353, Istanbul, Turkey 2Bahcesehir University, Faculty of Engineering and Natural Sciences, Department of Mechatronics

Engineering, 34349 Besiktas, Istanbul, Turkey


Structure, optical and biological properties of Mn/Cu co-doped ZnO nanoparticles were

studied. Zn0.99-xMnxCu0.01O (x=0.0, 0.01, 0.02, 0.04, and 0.05) precursor solutions were

prepared by sol-gel synthesis using Zn, Cu and Mn acetates which were dissolved into a

solvent and chelating agent. Zn0.99-xMnxCu0.01O nanoparticles with different concentration

were synthesized using the sol-gel technique. Then nanoparticles were annealed at 600°C

temperature for 30 minutes, were tried to observe the effect of doping ratio on mentioned

properties. The morphology of the Zn0.99-xMnxCu0.01O nanoparticles depends on sol-gel

parameters such as drying, heat treatment, and annealing condition by using a scanning

electron microscope. Structural behavior of the nanoparticles was studied by X-ray diffraction

technique. The effect of Mn/Cu elements in Zn0.99-xMnxCu0.01O the composition was clarified

by calculating lattice parameters, cell volumes, stress, microstrain, the locality of the atoms

dislocation density, displacement of atoms and bond length. The photocatalytic activity of

ZnO and Mn-doped ZnO (Zn1-xMnxO) nanoparticles were investigated based on the

degradation of the Methylene Blue (MeB) as model organic dye under ambient light. The

particle size, morphology, optical and biological properties of the nanoparticles with different

doping ratio are presented.

48


ICCMMS-2019

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ADANA, TURKEY

O-14

Controlling Physical and Magnetic Properties of CoPt Nanoparticles

Dogan Kaya1, Idris Adanur2, Mustafa Akyol3, Faruk Karadag2, Ahmet Ekicibil2

1Cukurova University, Dept. Of Electronics and Automation, 01160, Cukurova, Adana, Turkey 2Cukurova University, Dept. of Physics, 01330, Saricam, Adana, Turkey

3Adana Alparslan Turkes Science and Technology University, Materials Engineering Department, 01250,

Saricam, Adana, Turkey


Controlling physical and magnetic properties of magnetic nanoalloys is an emerging field in

21st century for wide range of technological applications, such as MRI imaging, magnetic

recording media, magnetoresistive sensors, biological and medical purposes.1, 2 Due to

intrinsic magnetic properties of cobalt (Co) films or nanoparticles (NP), they are widely used

in ultrahigh-density magnetic recording media because of its high magnetic anisotropy.3 Co

provides ferromagnetic behaviour which can be controlled by combining with noble metals.

In this study, we were synthesized CoPt NPs by polyol method under N2 gas. X-ray

diffraction (XRD) method and Energy-dispersive X-ray (EDX) spectroscopy were used to

determine the structural properties and we found that the NPs exhibit Cubic crystal symmetry.

Besides, the average particle size distribution and the morphological characteristics of the

CoPt NPs were investigated by scanning electron microscopy (SEM). The average size of

NPs are found to be less than 13 nm. Temperature (M(T)) and magnetic field (M(H))

dependent experiments were performed using Physical Property Measurement System

(PPMS) with a Vibrating Sample Magnetometer (VSM) head. M(T) experiments were carried

out in Zero Field Cooled (ZFC) and Field Cooled (FC) by a sweeping temperature between 5

and 300 K under a magnetic field of 500 Oe. We found that the magnetization of CoPt NPs

are reduced so that the blocking temperature (TB) varies by the amount of Pt content in the

structure. From M(H) measurements, we observed clear hysteresis curves at 5, 60, and 300 K

up to 5 T and below 60 K the coercive filed (HC) exists.

The authors are thankful for the financial support of Cukurova University Scientific Research

Funding Grand No: FBA-2018-10412.

1. Y. Liu, Y. Yang, Y. Zhang, Y. Wang, X. Zhang, Y. Jiang, M. Wei, Y. Liu, X. Liu and J. Yang, Mater.

Res. Bull. 48 (2), 721-724 (2013).

2. D. Alloyeau, C. Ricolleau, C. Mottet, T. Oikawa, C. Langlois, Y. Le Bouar, N. Braidy and A. Loiseau,

Nat. Mater. 8, 940 (2009).

3. V. F. Puntes, K. M. Krishnan and A. P. Alivisatos, Science 291 (5511), 2115-2117 (2001).

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14-19 October 2019

ADANA, TURKEY

O-15

High Speed RSFQ To CMOS Readout Integrated Circuit Design

Fatih Akyurek1, Ali Bozbey1

1TOBB University of Economics and Technology, Dept. of Electrical and Electronics Engineering, Ankara,

Turkey


Superconductor circuits utilizing Rapid Single Flux Quantum (RSFQ) logic offers low power

dissipation and high operating frequency compared to their CMOS counterparts. RSFQ

circuits have rather complicated manufacturing process and substrate material which limits

the number of Josepshon junctions to be implemented on a single die. In order to implement a

microprocessor, a memory circuit has to be included in the system, however, due to the above

mentioned difficulties, memory circuit cannot be implemented on an RSFQ circuit die. In this

work, we offer a hybrid solution that logic circuits are implemented on RSFQ die, whereas

memory circuits are implemented on CMOS die. Therefore, we will utilize the speed of the

RSFQ logic and scalability of the CMOS circuits. In order to combine both logic circuits, an

amplifier circuit capable of converting logic levels of RSFQ to CMOS logic. This conversion

is the challenging part of due to the very low voltage levels and very high operating frequency

of RSFQ logic. Due to high speed requirement, 3-stage amplifier with SiGe BJT transistors

are used. Implemented circuit takes 1 mV differential input and amplifies it to the 1.8 V

CMOS logic levels.

Fig. 1: RSFQ to CMOS Readout Circuit Architecture

References

1. Likharev, K. K., and V. K. Semenov. "RSFQ Logic/Memory Family: A New J osephson-Junction Technology

for." IEEE Transactions on Applied Superconductivity 50.1 (1991).

2. Gupta, Deepnarayan, et al. "Integration of cryocooled superconducting analog-to-digital converter and SiGe

output amplifier." IEEE transactions on applied superconductivity 13.2 (2003): 477-483.

This work has been supported by TUBITAK under grant 117E816.

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14-19 October 2019

ADANA, TURKEY

O-16

Enhancement of the Low Temperature Thermoelectric Performance

of Na-substituted Bi2Sr2Co2Ox Ceramics

G. Çetin*1, B. Özçelik1, M. Gursul1, M.A. Madre2, A. Sotelo2, S. Adachi3, Y. Takano3

1Cukurova University, Dept. of Physics, 01330, Adana, Turkey 2 ICMA (CSIC-Universidad de Zaragoza), C/María de Luna 3, 50018, Zaragoza, Spain

3National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan


In this work, we have focused to investigate the low temperature thermoelectric properties of

Na substituted Bi2Sr2Co2Ox materials. Bi2Sr2-xNaxCo2Oy (x= 0.0, 0.05, 0.075, 0.10, and 0.15)

ceramic materials have been produced using a well-known classical ceramic route, followed

by texturing through laser floating zone (LFZ) technique.

From XRD analysis, it is observed that the crystal symmetry of all the samples shows very

similar patterns and secondary phases decrease with increasing Na-content. Electrical

resistivity of all Na-substituted samples is smaller than pure sample. For all samples, a

positive Seebeck coefficient have observed in the whole measured temperature interval,

pointing out that the conduction mechanism mainly is governed by holes. The maximum ZT

value has been obtained for Na=0.05 sample at around 400 0K.

Keywords: Thermoelectric oxides; Texture; microstructure; Electrical properties; Figure of

Merit


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ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-17

The Magnetic Field-Induced-Shape Memory Behaviour In Co Doped Ni-Mn-Sn-B

Ribbons

G. Kirat1,*, M.A. Aksan2

1 Inonu Universitesi, Bilimsel ve Teknolojik Araştırma Merkezi 44280 Malatya, TURKEY

2 Inonu Universitesi, Fen Edebiyat Fakultesi, Fizik Bolumu 44280 Malatya, TURKEY

In this study, the Ni50-xCoxMn38Sn12+By (x=0, 1, 3 and 5) ribbons were prepared by using

melt-spinning technique. The magnetic field-induced-martensitic transformation behavior of

the ribbons prepared was investigated in details. Austenite-martensite phase transition

temperatures in the Co-free Ni50Mn38Sn12+By ribbon was found very close to room

temperature. However, the phase transition temperatures decreased with increasing the Co-

content in the system, which is compatible with e/a rule. The resistance curves of the ribbons

overlapped at high magnetic field at 9 kOe, indicating that the martensiteaustenite phase

transformation is completed at high magnetic field of 9T. This is clear evidence for the

magnetic field-induced-martensitic transition. An important resistance change was observed

during the martensitic transformation depending on the magnetic field. The low field M-T

curves showed that the samples have antiferromagnetically aligned Mn atoms due to high Mn

concentration (> 25 % at.). Increase of Co-content in the Ni-Co-Mn-Sn-B system caused a

significant increase in the magnitude of the magnetization for almost all the ribbons, except

the Co5 ribbon due to the permanent magnetization. The M-H results provided another proof

to magnetic field-induced-transformation.

Support by Scientific Research Projects Coordination Unit of Firat University (Project No: FF.15.03).

52


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-18

Determination of the Nature of Magnetic Phase Transition

in Some Magnetocaloric Manganites Using Different Methods

G. Akça1, S. Kılıç Çetin2 and A. Ekicibil1

1 Çukurova University, Department of Physics, Faculty of Sciences and Letters, 01330, Adana, Turkey. 2 Çukurova University, Central Research Laboratory, 01330, Adana, Turkey.


Magnetic refrigeration (MR) is foreseen as the best cooling technology due to the fact

that it is environment-friendly, high energy-saving and quite soundless over conventional gas

compression systems in use today [1-2]. The working principle of MR is based on

magnetocaloric effect (MCE) defined as an intrinsic phenomenon of a magnetic material,

which exhibits an isothermal magnetic entropy change (ΔSM) or adiabatic temperature change

(ΔTad) when it is subjected to a changing magnetic field [3]. The use of the magnetocaloric

material in MR applications depends on several important factors such as large ΔSM under low

magnetic field near room temperature and large relative cooling power (RCP) [4]. In addition

to these, the type of the magnetic phase transition is also important and required feature

because of the fact that it affects the working efficiency of a magnetic cooling material. The

material exhibiting first order magnetic phase transition has large thermal and magnetic

hysteresis although it has large ΔSM near room temperature [2]. This limits the usage of these

materials as cooling material in MR applications. It is known that manganites have acceptable

magnetocaloric properties around room temperature and exhibit second order magnetic phase

transition. These materials have been also extensively investigated because of their beneficial

properties such as cheap raw material, easy sample preparation technique, small thermal and

magnetic hysteresis. In this work, the type of the magnetic phase transition for some

manganites exhibiting acceptable magnetocaloric properties has been determined by using

different methods such as Banerjee criterion, Landau theory and universal curve. All results

show that the type of magnetic phase transition for all samples is second order.

Acknowledgement: This work was supported by Çukurova University (Adana/Turkey) under

grant project number of FBA-2018-10363.

References 1. V. Franco, J.S. Bl´azquez, B. Ingale, and A. Conde, Annu. Rev. Mater. Res.42 (2012) 305-342.

2. M. H. Phan, S. C. Yu, “Review of the magnetocaloric effect in manganite materials”, Journal of Magnetism

and Magnetic Materials 308 (2007) 325-340.

3. V. K. Pecharsky, K. A. Gschneidner Jr, Journal of Magnetism and Magnetic Materials 200 (1999) 44-56.

4.V. Franco, J. S. Blázquez, and A. Conde, Applied Physics Letters 89, 222512 (2006).

53


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-19

Elaboration of Annealing Effects on the Spin-Coated CZTS Thin Films

H. Kavak, T. Özdal

Cukurova University, Dept. of Physics, 01330, Adana, Turkey


CZTS has been considered as an alternative absorber layer in fabrication of low-cost solar cell

due to its earth abundant and environmentally friendly constituents. CZTS as promising a p-

type semiconducting material with an optimal direct band gap of 1.5eV and high absorption

coefficient in the visible range has been extensively investigated due to its promising

properties for solar cell applications. However, studies on structural and optical properties of

CZTS are quite limited. It is important to indicate that the annealing temperature effect on the

formation of thin film leads researchers towards improving highly efficient photoactive

materials. Specifically, linear optical properties for CZTS films prepared by sol-gel method in

which the highest solar cell efficiencies were obtained have not been sufficiently investigated.

In this study, temperature dependent structural, morphological and linear optical properties of

spin-coated CZTS films were investigated.

Acknowledgement

This work was supported by the Research Fund of Cukurova University (Grant No FBA-

2019-11766)

References

1. K. Tanaka, N. Moritake, H. Uchiki, Preparation of Cu2ZnSnS4 thin films by sulfurizing sol–gel deposited

precursors, Solar Energy Materials and Solar Cells 91 1199-1201 (2007)

2. T.K. Todorov, K.B. Reuter, D.B. Mitzi, High‐efficiency solar cell with earth‐abundant liquid‐processed

absorber, Advanced Materials 22 E156–E159 (2010)

3. M.G. Gang, K.V. Gurav, S.W. Shin, C.W. Hong, J.H. Min, M. P. Suryawanshi, S.A. Vanalakar, D.S. Lee, J.H.

Kim, A 5.1% efficient kesterite Cu2ZnSnS4 (CZTS) thin film solar cell prepared using modified sulfurization

process Phys. Status Solidi C, 1–4 (2015)


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ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-20

Structure, Optical and Biological Properties Of Mn-Doped Zno Nanoparticles

Mehmet Can Alphan5, Bestenur Yalcin1, Kenan Senturk2, Ibrahim Ertugrul Yalcin3,

Dogan Akcan4, Lutfi Arda6

1Bahcesehir University, Department of Biomedical Engineering, 34353, Istanbul, Turkey


4Bahcesehir University, Department of Mathematics Engineering, 34353, Istanbul, Turkey 5Bahcesehir University, Department of Electrical and Electronics Engineering, 34353, Istanbul, Turkey

6Bahcesehir University, Department of Mechatronics Engineering, 34353, Istanbul, Turkey


In this work, Mn-doped ZnO was synthesized by the sol-gel method by varying the dopant

ratio from x=0.01 to 0.05 with 0.01 increment. Structural, optical and biological properties of

Mn-doped ZnO were investigated based on their concentration dependence. Structural

behavior of the nanoparticles was studied by X-ray diffraction technique and it was found that

Zn1-xMnxO samples were hexagonal Wurtzite structure with no secondary phase. The effect of

Mn element in Zn1-xMnxO composition was clarified by calculating lattice parameters, cell

volumes, stress, microstrain, the locality of the atoms dislocation density, displacement of

atoms and bond length. Scanning Electron Microscope (SEM) images revealed random

agglomeration. The band gap energies Eg of Zn1-xMnxO structures and the variation of Eg

energies were determined and discussed. The photocatalytic activity of ZnO and Mn-doped

ZnO (Zn1-xMnxO) nanoparticles were investigated based on the degradation of the

Methylene Blue (MeB) as model organic dye under ambient light. The particle size,

morphology, optical and biological properties of the nanoparticles with different doping ratio

are presented.

Keywords: Zinc oxide, sol-gel method, optical properties, biological properties


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ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-21

The Synthesis of Polyvinylpyrrolidone (PVP)-Assisted Ni Magnetic Nanoparticles

(MNPs)

İ. Adanur1, M. Akyol2, A. Ekicibil1

1Cukurova University, Dept. of Physics, 01330, Adana, Turkey 2Adana Alparslan Türkeş Science and Technology University, Dept. of Materials Engineering, 01250, Adana, Turkey


Nickel (Ni) magnetic nanoparticles (MNPs) are one of the important ferromagnetic material.

Since Ni has soft magnetic characteristic, there is a great attention to integrate it into

hydrogen storage, catalysis, magnetic recording media and biomedical applications [1-2].

Here, we present the synthesis of Polyvinylpyrrolidone (PVP)-assisted Ni MNPs in Ethylene

Glycol (EG) by the polyol process. The structural properties of Ni MNPs were investigated by

the X-Ray Diffraction (XRD) analysis. From the XRD pattern (Fig. 1), the crystallite size of

Ni MNPs was calculated as ~3.59 nm that Ni MNPs formed from tiny crystals with Fm-3m

space group. The particle size of Ni MNPs was determined as ~4.21 nm from the Scanning

Electron Microscope (SEM) images. The elemental analysis was performed with Energy

Dispersive Spectroscopy (EDS). To understand of magnetic properties of PVP-assisted Ni

MNPs, we carried out the temperature dependence magnetization (M-T) measurements under

zero field cooled (ZFC) and field cooled (FC) conditions and the magnetic field dependence

magnetization (M-H) measurements without cooling via the Physical Property Measurement

System (PPMS) with Vibrating Sample Module (VSM).

Fig. 1: The XRD pattern of PVP-assisted Ni MNPs.

References

1. V. Tzitzios, G. Basina, M. Gjoka, V. Alexandrakis, V. Georgakilas, D. Niarchos, N. Boukos and D. Petridis,

17(15): p. 3750, (2006).

2. F. Davar, Z. Fereshteh, and M. S. Niasari, Journal of Alloys and Compounds, 476(1-2): p. 797-801, (2009).

56


ICCMMS-2019

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ADANA, TURKEY

O-22

Preparation and Characterization of Mg/B co-doped ZnO Nanoparticles

Kenan Senturk 1, Lutfi Arda2

1Istanbul Gelisim University, Department of Mechatronics Engineering, 34310, Istanbul, Turkey 2Bahcesehir University, Department of Mechatronics Engineering, 34353, Istanbul, Turkey


The objective of thiş study is to investigate the structural and physical properties of Mg and B

co-doped Zinc Oxide (ZnO) nanoparticles. Zn0.98-xMg0.02BxO (x=0.0, 0.01, 0.02, 0.03, 0.04,

and 0.05) samples were synthesized by using sol gel method. Zinc acetate dihydrate

(Zn(CH3COO)2.2H2O, Merck), magnesium acetate tetrahydrate (Mg(CH3COO)2·4H2O, Alfa

Aesar) and Boric acid ((H3BO3) Merck) were used as starting materials without further

purification. HPLC grade methanol (Merck) was used as solvent, and monoethanolamine

(Merck) was used as sol stabilizer. Precursor solutions aged under magnetic stirring

overnight. To form the gel phase, aging solutions were dried in ambient atmosphere under

magnetic stirring [1-4]. After the nanoparticles were prepared, the Hemolytic activity tests

were performed and results were presented in Fig 1. The time independent (t=390')

absorbance versus wavelength for different concentration of Boron were also presented in Fig

2. Structural and morphological characterizations of Zn0.98-xMg0.02BxO nanoparticles were

studied by using XRD and SEM-EDX, respectively. X-ray diffraction of the Mg/B co-doped

ZnO nanoparticles results indicated that all samples had a ZnO wurtzite structure.

Fig. 1: Dependence of %Hemolysis to concentration. Fig. 2: B dependent absorbance vs wavelength.

References 1. R. B. H. Tahar, N. B. H. Tahar, Boron-doped zinc oxide thin films prepared by sol-gel technique, Journal of

Materials Science 40 (2005) 5285 – 5289

2. A. Ahmad, A. M. Alsaad, Q. M. Al-Bataineh, M. A. Al-Naafa, Optical and structural investigations of dip-

synthesized boron-doped ZnO-seeded platforms for ZnO nanostructures, Applied Physics A (2018) 124:458

3. U. Ozgur, Ya. I. Alivov, C. Liu, A. Teke, M. A. Reshchikov, S. Dogan, V. Avrutin, S.J. Cho, and H. Morkoc,

A comprehensive review of ZnO materials and devices, Applied Physics Reviews, Journal Of Applied Physics

98, 041301 (2005).

4. M.Samadi , M. Zirak, A. Naseri , E. Khorashadizade, A. Z. Moshfegh, Recent progress on doped ZnO

nanostructures for visible-light photocatalysis, Thin Solid Films 605 (2016) 2–19


57


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ADANA, TURKEY

O-23

The Effect of Stoichiometric Ratio on the Magnetic Properties of SrFe12O19 Powders

Produced by Mechanochemical Synthesis Method

K. Icin1, D.D. Cakil1, S. Oztürk1

1Karadeniz Technical University, Dept. of Metallurgical and Materials Engineering, 61080, Trabzon, Turkey


In this study, the variation of structural and magnetic properties of Sr-hexaferrite magnets

produced by using different stoichiometric ratios of the strontium carbonate (SrCO3) and the

scale (Fe2O3) which is known as waste material in steel production was investigated. It is

known that the stoichiometric ratio between the strontium carbonate and the scale is the most

effective parameter in the formation of the strontium hexaferrite magnet which provides

permanent magnetic properties [1]. For this purpose, the stoichiometric ratio between SrCO3

and Fe2O3 changed from 1:5.5 to 1: 6.6 at intervals of 0.1. In order to examine the effect of

stoichiometric ratio on phase structure, the measurements were made for each ratio separately

in X-ray diffraction apparatus. The Rietveld Refinement analysis was performed with

HighScore Plus software for the diffraction patterns of all ratios, and the SrFe12O19 hard

magnetic and the α-Fe2O3 soft magnetic phases were determined. The vibrating sample

magnetometer (VSM) apparatus of 1 T was used in order to reveal how the different

stoichiometric ratios between SrCO3 and Fe2O3 powders affected the magnetic properties. As

a result of the experimental studies, as the stoichiometric ratio changed from 1: 5.5 to 1: 6.0,

the amount of the SrFe12O19 phase as well as the coercivity values increased from 1.9 kOe to

3.5 kOe. With increasing stoichiometric ratio from 1:6.1 to 1: 6.6, the coercivity values

decreased from3.4 kOe to 0.4 kOe.

References

1. Xu, Y., Ma, Y., Zhang, X., Zheng, G., Dai, Z., Ma, Q., Zan, F., Li, G. ve Wu, M., Effects of the

Fe3+/Sr2+ molar ratio on the exchange-coupling of the composite and single-phase SrFe12O19,

Materials Research Bulletin, 57 (2013) 13-18.

mailto:[email protected]#_blank

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O-24

AC Magnetic Response of Superconducting Films and Superlattices

L. Miu, I. Ivan, A. Crisan

National Institute of Materials Physics, Bucharest-Magurele, Romania


The nonlinear AC magnetic response of superconductors in mixed (vortex) state is not

completely understood. The simple extension of standard flux-creep models at short-time

scales is unable to explain several peculiar effects, such as the presence of unexpectedly high

vortex activation energies in the AC magnetic signal close to the DC irreversibility line,

especially at low external magnetic fields. To elucidate this aspect, we investigated the DC

magnetic hysteresis curves and the AC magnetic response of superconducting YBCO films

and YBCO/PrBCO superlattices at usual frequencies and amplitudes, with the DC and AC

fields oriented perpendicular to the film surface. The YBCO films have a well characterized

pinning structure (embedded non-superconducting nanorods and nanoparticles), where the

average distance between the pinning centres can be determined. The considered superlattices

(with the thickness of superconducting and non-superconducting blocks of several unit cells)

are almost decoupled. In these superlattices, the presence of a disentangled vortex system is

assured, at least for relatively low external DC fields, and the effective length of the hopping

vortex segment is fixed by the thickness of superconducting layers. It is shown that around the

DC irreversibility line the AC magnetic signal corresponds to a non-diffusive, thermally

activated vortex hopping over a length which overcomes the average distance between the

pinning centres. Such a hopping is accompanied by successive, short-time pinning and

depinning events (where the smearing of the vortex pinning potential by thermally induced

vortex fluctuations is reduced), and can be described in terms of a nonlinear flux-flow

process. The large vortex activation energy in the AC magnetic response results from the

pinning-enhanced viscosity of the vortex system, suggesting a new approach for the presence

of a pinned vortex liquid in superconductors [1].

References

1. L. Miu et al., “High Vortex Activation Energies in the AC Magnetic Response of Superconductors Close to

the DC Irreversibility Line”, Chapter 6 in Superconductivity. From Materials Science to Practical

Applications, P. Mele et al. Eds. (Springer Nature Switzerland, 2020).

59


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14-19 October 2019

ADANA, TURKEY

O-25

Preparation, Growth, And Optical Properties Of (Cu/Co) Co-Doped Zno Thin

Films

Dogan Akcan1, Bestenur Yalcin2, Kenan Senturk3, Ibrahim Ertugrul Yalcin4,

Mehmet Can Alphan5, Adil Guler6, Cihat Boyraz7, Lutfi Arda8

1Bahcesehir University, Department of Mathematics Engineering, 34353, Istanbul, Turkey 2Bahcesehir University, Department of Biomedical Engineering, 34353, Istanbul, Turkey


5Bahcesehir University, Department of Electrical and Electronics Engineering, 34353, Istanbul, Turkey 6Marmara University, Ataturk Faculty of Education, Department of Computer Education and Instructional

Technologies, 34722 Goztepe, Istanbul, Turkey 7Marmara University, Faculty of Technology, Department of Mechanical Engineering, 34722 Goztepe, Istanbul,

Turkey 8Bahcesehir University, Department of Mechatronics Engineering, 34353, Istanbul, Turkey


Preparation, growth, structure, and optical properties of Co doped ZnCuO nanoparticles and

thin films were studied. Zn1-x-yCuxCoyO (x=0.0, 0.01, 0.02, 0.04, and 0.05; y=0.0, 0.01, 0.02,

0.003, 0.04 and 0.05) precursor solutions were prepared by sol-gel synthesis using Zn, Co,

and Cu based alkoxide which were dissolved into solvent and chelating agent. Zn1-x-yCuxMyO

thin films with different thickness were produced on glass substrate using sol-gel dip coating.

The nanoparticles and thin films were annealed at various temperatures and times, were tried

to observe the doping ratio, temperature, time, and thin films effect on structural and magnetic

properties. The particle size and crystal structure of nanoparticles were characterized by X-

Ray diffraction (XRD) and Scanning Electron Microscope (SEM). The surface morphologies

and microstructure of all samples were investigated by SEM and XRD. Optical properties of

Zn1-x-yCuxCoyO thin films obtained by using PG Instruments UV-Vis-NIR spectrophotometer

in 190 – 1100nm range and optical band gap is obtained. The surface morphology of the Zn1-x-

yCuxCoyO films depend on substrate nature and sol-gel parameters such as withdrawal speed,

drying, heat treatment, deep number (film thickness), and annealing condition. Surface

morphologies of Co doped ZnCuO thin films are dense, without porosity, uniform, crack, and

pinhole free. The particle size, surface morphology, film thickness, optical, and electrical

properties of nanoparticles and the thin films with different doping ratio, thickness,

temperature, and time of annealing process are presented.

60


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-26

Effect of Grain Growth Temperature on Y358 Activation Energy

M. Başoğlu1,2

1Gümüşhane University, Dept. of Energy Systems Engineering, 29100, Gümüşhane, Turkey 2Karadeniz Technical University, Dept. of Physic, 61100, Trabzon, Turkey


The Y3Ba5Cu8O18±δ (Y358) superconductor is the newest member of the YBCO family [1]. In

this study, Y358 bulk superconductors were fabricated using the Melt-Powder-Melt-Growth

(MPMG) method. Different grain growth temperatures were used during production. As a

result, three samples were produced different temperatures of 1030 °C, 1040 °C and 1050 °C.

Electrical resistivity transition in the bulk polycrystalline superconducting sample plays an

important role to be understood in the flux motion mechanism. Based on the Arrhenius

equation, a method to calculate the activation energy from the resistance transition is

proposed for high temperature superconductors [2]. The electrical properties of the sample

were investigated by means of magnetoresistivity (R-T) measurements. Activation energy

(U0) were determined from the R-T under various values of applied magnetic field. Fig.1a

shows the ln(ρ/ρ0)-(1/T) curve of the produced at 1030 °C. Activation energies were

calculated from the slope of the curve (Fig. 1b). As seen in each curve, activation energy

decreases with increasing magnetic field in accordance with the literature [3]. Although

activation energy of the Y1040 sample, regardless of applied magnetic field, is higher than

that of the other samples, the best activation energy value was observed for the Y1050 sample

under the applied magnetic field.

(a) (b)

Fig. 1: Arrhenius plots of the normalized resistivity of Y1030 and, b) Activation energy as a

function of the magnetic field for the all samples

References 1. A. Aliabadi, Y.A. Farshchi, M. Akhavan, Phys. C 469 2012 (2009).

2. T.T.M. Palstra, B. Batlogg, R.B. Vandover, L.F. Schneemeyer, J.V. Waszczak, Phys. Rev. B 41 6621(1990).

3. S. Kutuk, S. Bolat, C. Terzioglu, S.P. Altintas, J. Alloys Compd. 650 159 (2015).

Y1030

1/T (K-1)

0.0100 0.0105 0.0110 0.0115 0.0120 0.0125

ln(

-2.5

-2.0

-1.5

-1.0

-0.5

0.0 0.0 T

0.5 T

1.0 T

2.0 T

3.0 T

H(T)

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

U0(e

V)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4Y1030

Y1040

Y1050

61


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-27

Ru Doped Effect on Tio2 For Photocatalytic Applications

Mehtap Ozdemir1,2, Yeşim Alduran2, Gulnur Aygun2, Lütfi Özyüzer1,2

1Department of Physics, Izmir Institute of Technology, Urla, Izmir, Turkey 2Teknoma Technological Materials Inc., Izmir Institute of Technology Campus, 35430, Urla, Izmir, Turkey

Corresponding Author: [email protected] ; [email protected]

Titanium (IV) oxide or titania (TiO2) is one of the most common materials for a variety of

applications such as catalytic devices, sensors, solar cells, and other optoelectronic devices.

TiO2 is a wide bandgap semiconductor with many interesting properties, including

transparency to visible light, high refractive index and low absorption coefficient [1]. Other

than these properties, it has been known to be an excellent catalyst in the field of

photocatalytic decomposition of organic materials. TiO2 is known to have three natural

polymorphs, i.e. rutile, anatase, and brookite. Only anatase is generally accepted to have

significant photocatalytic activity [2]. Although TiO2 photocatalyst has many applications in

powder form, thin films form has excellent advantages as good mechanical durability,

multilayer optical coatings controllable deposition conditions and re-usability. Considering

the architectural tilt of the solar panels, high cost and the places where they are installed, it is

understood that the importance self-cleaning method. As known that TiO2 can be activated by

UV light which constitutes a small portion of the electromagnetic spectrum. This feature

limits the practical application area based on the photocatalytic activity of TiO2 thin film.

Therefore, the photocatalytic activity of TiO2 has to be improved efficiency for practical

applications. There are different methods for improving photocatalytic activity under visible

light. Now, most researchers focused on improving the photocatalytic properties by doping

with various metal ions [3-6]. In this study, Ruthenium (Ru+) metal was doped in TiO2 thin

film to improve photocatalytic activity of it. The residual energy level has occurred in the

TiO2 crystal structure when doped Ru+ ion and electron–hole pairs are easily separated from

each other and these are created new energy levels and prevented electron-hole

recombination. Undoped and Ruthenium (Ru) doped TiO2 thin films with different

percentages were prepared using magnetron sputtering techniques. All samples were heat

treated in an oven for 2 h (500 ° C) after each deposition cycle to get the anatase phase crystal

structure. The optical and morphological properties were determined using UV-Vis

Spectrophotometer, and scanning electron microscopy. Photocatalytic activity of undoped

and different ratio Ru-doped TiO2 thin films are determined after hours with organic pollution

as a methylene blue dye degradation under UV light. The degradation of methylene blue and

photocatalytic activity were investigated kinetically and photocatalytic activity rate constants

of the photocatalysts were calculated. The photocatalytic degradation percentage of

Methylene Blue was reached 87%, after 24 hours of UV irradiation. Consequently, the

anatase phase of Ru doped TiO2 thin films are found best photocatalytic activity in self-

cleaning performance.

References [1] Z. Wang, N. Yao, X. Hu. Vacuum 108(0):20-6. (2014)

[2] Heo CH, Lee S-B, Boo J-H. Thin Solid Films 475(1):183-8 (2005)

[3] M. Ratova, P. Kelly, G. West, I. Iordanova. Surface and Coatings Technology 228:S544-S9 (2013)

[4] A. Manole, M. Dobromir, et al. Ceramics International 39(5):4771-6 (2013)

[5] D. Dvoranova, V. Brezova, et al.. Applied Catalysis B: Environmental 37(2):91-105 (2002)

[6] B. Tryba, M. Piszcz, A. Morawski. Journal of Open Materials Science 4(2):5-8 (2014)



62


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O-28

Characterization of ZnSnO/Ag/ZnSnO Thin Films on Polymers for OLEDs

M. Ekmekcioglu1, *, N. Erdogan3, A. T. Astarlıoglu3, R. E. Ece3, M. Ozdemir1, 2, G. Aygun2,

L. Ozyuzer1, 2

1Department of Physics, Izmir Institute of Technology, Urla, 35430, Izmir, Turkey 2Teknoma Technological Materials Inc., Izmir Technology Development Zone, Urla, 35430, Izmir, Turkey

3Turkish Aerospace Industries Inc., Advanced Material, Process and Energy Technology Center, 06980,

Ankara/Turkey


Organic light-emitting diodes (OLEDs) have been used in many applications during the last

20 years because of their advantages of self-emission, low driving voltage, high efficiency,

wide viewing angle and flexibility [1]. For current commercial OLEDs, it has been used with

indium tin oxide (ITO), aluminum zinc oxide (AZO) or zinc tin oxide (ZnSnO or ZTO) being

the TCOs. Indium tin oxide (ITO) has superior electrical and optical properties [2]. AZO is

another TCO generally used for many applications in the literature [3]. In this study, the

eligibility of ZTO instead of ITO as an anode in OLED production is explored. ZTO has

advantages compared to ITO thin films since its components are abundant on earth and it has

less surface roughness [4]. The current application is increasing in the direction developed for

ZTO films coated on polymer substrates [5]. ZTO/Ag/ZTO (ZAZ) multilayer thin films have

been deposited on polyethylene terephthalate (PET), polyimide (PI) substrates using DC

magnetron sputtering. The result of ZAZ multilayer thin film was achieved with very low

sheet resistance and high optical transmittance at 550 nm. In this way, the best coated thin

films have been investigated using spectrophotometry, energy-dispersive X-ray spectroscopy

(EDS), scanning electron microscopy (SEM) and X-ray diffraction (XRD).

0

20

40

60

80

100

400 800 1200 1600 2000 2400

Empty-PET

20.8 ohm/sq

21.3 ohm/sq

21.7 ohm/sq

Tra

nsm

issi

on

(%

)

Wavelenght (nm) Fig. 1: Device structure of ZAZ multilayer thin

film. Fig. 2: Optical transmittance graph of ZAZ

multilayer thin films on PET.

*This research is supported by TAI (Turkish Aerospace Industries) with project number TM0131.

References 1. R. P. Xu, Y. Q. Li, J. X. Tang., J. Mater. Chem. C. 4, 9116-9142 (2016).

2. O. Tuna, Y. Selamet, G. Aygun, L. Ozyuzer., J. Phys. D: Appl. Phys. 43, 055402 (2010).

3. F. Turkoglu, H. Koseoglu, S. Zeybek, M. Ozdemir, G. Aygun, L. Ozyuzer., J. Appl. Phys. 16, 165104 (2018).

4. H. Koseoglu, F. Turkoglu, M. Kurt, M. D. Yaman, F. G. Akca, G. Aygun, L. Ozyuzer., Vacuum 120, 8–13

(2015).

5. Y. Demirhan, H. Koseoglu, F. Turkoglu, Z. Uyanik, M. Ozdemir, G. Aygun, L. Ozyuzer., Renewable Energy

146, 1549-1559 (2020).


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O-29

Investigation of Magnetic Force Properties in Three-Surface HTS Maglev System

M. Abdioglu1,2, K. Ozturk2, Z. Karaahmet2, B. Savaskan3

1 Department of Mathematics and Science Education, Faculty of Education, Bayburt University, 69000, Bayburt,

Turkey 2 Department of Physics, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey

3 Energy Systems Engineering, Faculty of Technology, Karadeniz Technical University, 61830, Of, Trabzon,

Turkey


The magnetic levitation stems from the interaction between the high temperature

superconductors (HTS) and permanent magnets (PM) and this phenomenon is used to develop

magnetically levitated transportation systems (Maglev). It is seen from performed studies in

literature that the vertical magnetic levitation force for passenger and load carrying capacity

and lateral guidance force for movement stability and safety of Maglev systems should be

increased. This can be achieved by improving the superconducting properties of HTS,

producing HTSs in large dimensions and optimizing the permanent magnetic guideway

(PMG) on which the vehicle moves.

In this study, we have performed detailed experimental studies on the magnetic force

properties of multi-seeded YBCO superconductors in three-surface HTS Maglev systems. The

experimental studies showed that the magnetic force properties of HTS Maglev systems can

be enhanced by optimizing the HTS-PMG arrangements.


64


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-30

Fuel Gas Sensing Ability of Oxide Semiconductors

Musa M. Can

Renewable Energy and Oxide Hybride Systems Laboratory, Phyics Department, Faculty of Science, Istanbul

University, Vezneciler, 34314, Istanbul, Turkey

[email protected]

Recent couple of years, oxide semiconductors are being widely investigated subject due to

tunable gas sensing ability, originating from intrinsic point defects. In addition, point defects

may cause the high oxygen ions diffusion ability through the lattice. These unique

performances make oxide semiconductors useful as an anode or a cathode electrode especially

for a fuel cell. In our study we focused on Cobalt and Lithium doped ZnO and CoGa2O4. We

understand the crystal formation and type point defects in the lattice by employing Reitveld

refinement.

The sensing ability was performed with temperature dependent I-V and C-V curves.

Electrochemical impedance spectroscopy (EIS) was used to analyze the electrical behavior of

these semiconductors as a function of frequency. The aim of EIS measurements is to

investigate frequency dependent ionic transport properties at high temperatures i.e. above the

300 °C.

Keyword: semiconductor, point defect, fuel cells

mailto:*[email protected]

65


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-31

Determination of The Intrinsic Viscosity and Molecular Weight of

Poly (Methyl Methacrylate) Blends

Y. Yigit1, A. Kilislioglu2, S. Karakus2, B. Ozcelik3, N. Baydogan1

1Energy Institute, Ayazaga Campus, Maslak, 34469, Istanbul, Turkey

2Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpasa, 34320 Avcilar, Istanbul,

Turkey 3Department of Physics, Cukurova University, Adana, Turkey

Poly (methyl methacrylate) (PMMA) blends were synthesized through atom transfer radical

polymerization (ATRP) method under at different concentration ratios. The viscosity

characteristics of the structure were investigated to determine the behaviour of

macromolecules in blends. The viscosity characterization of the nanoparticles was determined

to explain the molecular structure and interactions. The intrinsic viscosity of the blend was

calculated with three different models including Huggins, Kraemer, and Rao. All blends were

performed to understand the effect of additives concentration on molecular conformations and

the intrinsic viscosity of the polymers. The voluminosity (VE) and the shape factor (υ) were

calculated for the blends to understand the miscibility behaviour. From experimental results, it

was observed that the intrinsic viscosity was increased with the increase in the amount of

substance and the solubility of the system in solution.

Keywords: ATRP method, Molecular weight, PMMA, Viscosity

66


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-32

Investigation of Radiation Absorption Parameters for elements between 50≤Z≤65 using

59.5 keV Gamma-Ray Photons

N. Kup Aylikci1

1Iskenderun Technical University, Dept. of Energy Systems Engineering, 31200, Iskenderun, Hatay, Turkey


The radiation absorption capability of materials is one of the most important properties in

scientific areas such as radiation physics, nuclear physics, dosimetry and elemental analysis of

materials. There are different methods to determine the radiation absorption properties of

materials but energy dispersive X-ray fluorescence is the practical, easy and non-destructive

method for photon absorption investigation and quantitative analysis of materials. In this

study, K-shell absorption jump factors and jump ratios were calculated semi-empirically using

the calculated total atomic photo-effect cross section and the measured K X-ray production

cross-sections. For experimental measurements, the elements were irradiated by 59.5 keV

gamma rays from 241Am annular radioactive source. The emitted K X-rays were counted by

an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. The semi-empirical

parameters were compared with the data in the literature and it was found that the semi-

empirical values were compatible within experimental error limits (1%–6%).

Keywords: Photo-effect cross-sections, K-shell absorption jump ratio, K shell absorption

jump factor, 241Am radioactive source


67


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-33

Fabrication of Nanoscale Electrodes by Electrospun Nanofibers

Ö. Sağlam1, H. Döğer1, A. Noori2, G. Aygün2

1İzmir University of Economics, Faculty of Engineering, İzmir, 35330, Turkey 2 İzmir Institute of Technology, Dept. of Physics, İzmir, 35430, Turkey


Electro-spinning is a versatile method used in the production of continuous nanofibers from a

wide variety of polymer solutions. Electrospun nanofibers can be directly written for the

production of biomimetic structures1 and nanochannels2 in lab-on-a-chip devices, and

manufacturing of organic semiconducting nanowire arrays in field-effect transistors3. Here,

we aligned and patterned the nanofibers at the desired position to protect the metal surface

underneath the fibers from subsequent etching procedure. In this way, we first demonstrated a

low-cost lithography technique for fabrication of nanoscale electrodes using directly written

electrospun nanofibers. Firstly, we set up a system for direct-writing having a pump for

polymer injection through a needle, a power supply, and an x-y stage controlled by software.

After that, we worked with different parameters including the applied voltage, the gap

between the needle and the substrate, the concentration of polyethylene oxide solution, the

velocity of the x-y platform, the flow rate of the polymer and the type of the metal (Ag or Au)

coated on the substrate to control the direct writing of the fibers. After tunning and patterning

of the nanofibers via optimization of these parameters, the substrates were etched by reactive

ion etching to remove nanofıber uncoated metal surface. Finally, the nanofibers were stripped

off using oxygen plasma, and so the directly positioned nanoscale electrodes were fabricated.

The thickness and structure of the electrodes were examined by AFM and SEM-EDS,

respectively. EDS analysis (Fig. 1) also shows that the Ag peaks were eliminated after Ar ion

etching and only Ag electrodes having ~300 nm width were left.

Fig. 1:.EDS analysis from nanoscale metal electrode and the substrate.

References 1. S. Agarwal, J.H. Wendorff, A. Greiner, Polymer, 49, 5603 (2008).

2. X. Zhou, G. Xufang, L. Shuhu, Q. Man, D. Yichen, L. Yafei, B. Jianchun, Angewandte Chemie (2019).

3. S.-Y. Min, T.-S. Kim, B. J., Kim, H. Cho, Y.-Y. Noh, H. Yang, H., J.H. Cho, T.-W.Lee,

Nature Communications, 4, 1773 (2013)

2. A. Zaleska, Recent Pat Eng 2, 157(2008).

68


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-34

Electrochemical Hydrogen Production by Using G/Ni/Ag Cathode

R. Yıldız1, B. Doğru Mert2, S. Toprak Döşlü.1

1Mardin Artuklu University, Faculty of Health Sciences, Department of Nutrition and Dietetics 47100, Mardin,

Turkey 2Alparslan Türkeş Science and Technology University, Department of Energy Systems Engineering, Adana,

Turkey


The demand of energy increases all around the world, day by day with the help of increasing

industrial consumption and increasing world population which means personal consumption.

We need alternative, renewable and sustainable energy sources. In order to decrease CO2

emission, hydrogen is suitable and alternative fuel for us. We have many alternative hydrogen

production methods such as thermochemical processes (ie; steam methane reforming, coal

gasification, biomass gasification etc.), direct solar water splitting processes, biological

processes (from bacteria and microalgae), alkaline water electrolysis, etc. The alkaline water

electrolysis is a simple technique and we can produce pure hydrogen on cathode of this

system. In alkaline electrolysis systems, the main disadvantage is over poteantial values of

electrode materials. Resaearchers have achieved many studies in order to diminish over

potential values of electrodes. Results showed that Ni based cathode materials have

tremendous advantage because of higher conductivity and lower over potentials. Therefore, in

this study we coated graphite electrode with nickel and silver multilayer (G/Ni/Ag) and we

used this modified electrode as cathode in alkaline water electrolysis system. Results showed

that hydrogen production efficiency significantly increased and charge transfer resistance of

electrodes decreased via Ni/Ag multilayer [1-3].

Keywords: Hydrogen production, Alkaline electrolysis, G/Ni/Ag cathode

References 1. Elias, J. and Hedge, C. "Synthesis of Ni-W-Graphene oxide composite coating for alkaline hydrogen production"

Materials Today: Proceedings, 2018: 3078-3083.

2. Ismagilov, Z.R. Matus, E.V. Ismagilov, I.Z. and Sukhova A.B. "Hydrogen production through hydrocarbon fuel

reforming processes over Ni based catalysts." Catalysis Today, 2019: 166-182.

3. Zhuang, H. Cai, Z. Xu, W. Zhang, X. and Huang, M. "Constructing 1D CdS nanorod composites with high

photocatalytic hydrogen production by introducing the Ni-based cocatalysts." Catalysis Communications, 2019:

51-54.

69


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14-19 October 2019

ADANA, TURKEY

O-35

Comparison of Hydrogen Energy in Mg-Ni Alloys Produced by Melt Spinning

S. Öztürk1, S.E. Sünbül1,2, K. Icin1, G.B. Sekitmen2, Ş. Özcan2

1Karadeniz Technical Universityy, Dept. of Metallurgical and Materials Engineering, 61040, Trabzon, Turkey 2Hacettepe University, Dept. of Physics Engineering, 06800, Ankara, Turkey


The conventional gaseous state storage system as pressurized hydrogen gas and liquid

state storage system pose safety and cost problems to onboard applications. Therefore, they do

not satisfy the future goals for a hydrogen economy. Fortunately, solid state storage systems

based on metal hydrides have demonstrated great potentials to store hydrogen in large

quantities in a quite secure, compact, and repeatedly reversible manner and thus, becoming

increasingly attractive option for hydrogen applications (1).

In this study, Mg60-Ni40 and Mg80-Ni20 (wt. %) alloy ribbons have been produced

by melt spinning method. The structural and hydrogenation properties of Mg-Ni alloys with

different microstructures were evaluated (Fig. 1). The hydrogen storage capacity and kinetics

of hydriding of Mg–Ni alloys were strongly dependent on their microstructures and phases.

The amount of Ni element affects both hydrogen storage capacity and kinetics of the Mg-Ni

alloys. The Mg60-Ni40 and Mg80-Ni20 (wt. %) alloy ribbons exhibited excellent

hydrogenation kinetics at 350 °C and reversibly absorbed about 4.42 and 5.1 (%) mass

fraction of hydrogen, respectively.

Fig. 1: The SEM microstructures of Mg60-Ni40 (wt.%) (a, b) and Mg80-Ni20 (wt.%) (c, d) alloy

ribbons.

References 1.Abe JO, Popoola API, Ajenifuja E, Popoola OM. Hydrogen energy, economy and storage: Review and

recommendation. Int J Hydrogen Energy. 44(29):15072-86 (2019).

70


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ADANA, TURKEY

O-36

Effect of Film Thickness on Structural and Mechanical Properties of Zn0.95Cu0.05O

Thin Films

I. Topcu1, M. Tosun2, T. Baytak3, O. Bulut3, C. Ipek1, L. Arda4, S. Ataoglu3

1Alaaddin Keykubat University, Faculty of Rafet Kayıs Engineering,

Alanya, Antalya, Turkey 2Istanbul Technical University, Faculty of Mechanical Engineering,

Mechanical Engineering Department, 34437, Gumussuyu, Istanbul, Turkey 3Istanbul Technical University, Faculty of Civil Engineering,

Civil Engineering Department, 34469, Maslak, Istanbul, Turkey 4Bahcesehir University, Faculty of Engineering and Natural Sciences, Department of Mechatronics Engineering,

34349 Besiktas, Istanbul, Turkey


The structure, microstructure, and mechanical properties of the Zn0.95Cu0.05O thin films were

synthesized by the sol-gel technique, were investigated as a function of film thickness.

Zn0.95Cu0.05O thin films were coated on a glass substrate using the sol-gel dip-coating method.

Then, the thin films were annealed at 600C for 30 min temperature under air. X-ray

diffraction of the Zn0.95Cu0.05O thin films results indicated that all samples had a ZnO wurtzite

structure. Photoluminescence properties were measured by using the Agilent Cary Eclipse

Fluorescence Spectrophotometer. The surface morphologies and microstructure of all samples

were characterized by using Scanning Electron Microscope (SEM). It was observed that

surface morphologies of Zn0.95Mg0.05O thin film were crack-free, dense, uniform, and without

pinhole. The effects of film thickness on stress in Zn0.95Cu0.05O thin films were theoretically

analyzed to see if there were cracks in the thin films and the substrate.

Keywords: ZnO, Residual stress, Sol-gel, Thin films


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O-37

Growth of ZnO Thin Films by Pulsed Electron Deposition Method

Serap Yiğen

Izmir Institute of Technology, Department of Physics, 35430, Izmir, Turkey


Zinc Oxide, a wide band gap (~3.37 eV at RT) semiconductor with high excitonic binding

energy of ~60 meV, has become a promising material for developing optoelectronic devices,

operating in the near UV range [1]. Formation of high quality ZnO films is the major step to

design and fabricate ZnO based UV photodetectors. In recent years, Pulsed Electron

Deposition (PED) method has emerged as a novel tool, as it offers a powerful and cost-

effective way to grow high quality ZnO thin films [2, 3]. The effect of some deposition

conditions on the properties of grown films should carefully be investigated in order to

achieve high quality, crystalline ZnO films. In this work, ZnO films were grown by using

Pulsed Electron Deposition (PED) method. The PED deposition parameters were carefully

optimized and the morphological, structural, electronic and optical properties of grown ZnO

films were studied with respect to deposition parameters.

Acknowledgments

This research was supported by TUBITAK (Scientific and Technological Research Council of

Turkey) under BIDEB-2232 Program with Project No. 117C032.

References 1. H.L. Porter et al., Material Science and Engineering B 119, 210 (2005).

2. P. Zhan et al., Material Trans. 52, No. 9, 1764 (2011).

3. M. Nistor et al., J. Phys. D: Appl. Phys. 41, 165205 (2008)


72


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ADANA, TURKEY

O-38

Structure, Magnetic, Photocatalytic and Blood Compatibility properties of Ni-spinel

nanoparticle prepared via laser ablation technique

S. Özçelik1, B. Yalcin2, L. Arda3, L. A. Angurel4, G.F. de la Fuente4, B. Özçelik5

1Hakkari Universtity, Engineering Faculty, Food Engineering Department, 30000 Hakkari (Turkey) 2Bahcesehir University, Faculty of Engineering and Natural Sciences, Department of Biomedical Engineering,

34353, Besiktas, Istanbul, Turkey 3Bahcesehir University, Faculty of Engineering and Natural Sciences, Department of Mechatronics Engineering,

34353, Besiktas, Istanbul, Turkey 4Instituto de Ciencia de Materiales de Aragón, ICMA (CSIC-University of Zaragoza), 50018 Zaragoza, Spain

5Cukurova University, Faculty of Science&Letters, Dept. of Physics, 01330, Adana, Turkey


Recently, laser ablation synthesis in in liquids has attracted attention because of potential

applications in surface cleaning, etching, welding, drilling, cutting, and micromachining of

metals, alloys, polymers, semi-conductors, glasses and ceramics [1,2]. It can be regarded as a

green method to produce biocompatible nanoparticles for medical and catalytic applications

[3–5] without any chemical stabilizers. The main objective of this study is to investigate the

structural analysis, magnetic investigation, photocatalytic and blood compatibility of NiFe2O4

nanoparticles (NPs) synthesized by laser ablation technique. Structural and the size

distribution of NPs were studied by using X-Ray Diffraction (XRD), transmission electron

microscopy (TEM), respectively. Magnetization measurements were carried out in a 7304

model Vibrating Sample Magnetometer of Lake Shore, operating between 15-300 K. The

photocatalytic properties of NPs were evaluated by photo-degradation of Methylene Blue

(MeB) dye under ambient visible light illumination. Hemolytic activity of NPs was

investigated according to earlier reports [6], using blood samples drawn from healthy

volunteers.

References [1] A. Kruusing, Underwater and water-assisted laser processing: Part 2—Etching,cutting and

rarely used methods, Opt. Laser. Eng. 41 (2004) 329–352.

[2] J. Lv, X. Dong, K. Wang, W. Duan, Z. Fan, X. Mei, Study on process andmechanism of

laser drilling in water and air, Int. J. Adv. Manuf. Technol. 86(2016) 1443–1451.

[3] S. Barcikowski, G. Compagnini, Advanced nanoparticle generation andexcitation by lasers

in liquids, Phys. Chem. Chem. Phys. 15 (2013) 3022–3026.

[4] S. Barcikowski, V. Amendola, G. Marzun, C. Rehbock, S. Reichenberger, D.Zhang, B.

Gökce, Handbook of Laser Synthesis of Colloids, 2016.

[5] N. Lasemi, U. Pacher, C. Rentenberger, O. Bomatí-Miguel, W. Kautek,Laser-assisted

synthesis of colloidal Ni/NiOx core/shell nanoparticles in waterand alcoholic solvents,

ChemPhysChem 18 (2017) 1118–1124.

[6] Yalcin, B., Erbil, C. (2018). Effect of sodium hydroxide solution as polymerization solvent

and activator on structural, mechanical and antibacterial properties of PNIPAAm and P

(NIPAAm–clay) hydrogels. Polymer Composites 39:E386-E406.


73


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O-39

Synthesis and Characterization of a Quinoxaline and Benzodithiophene Comprising

Multifuctional Polymer

Serife O. Hacioglu1, Mustafa Yasa2, Tolga Depci1, Seza Goker3, Levent Toppare2,3,4,5

1Iskenderun Technical University, Department of Engineering Science, 31200, Hatay, Turkey 2Department of Polymer Science and Technology, Middle East Technical University,06800 Ankara, Turkey

3Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey 4 Department of Biotechnology, Middle East Technical University, 06800 Ankara, Turkey

5The Center for Solar Energy and Applications, Middle East Technical University,06800 Ankara, Turkey

Corresponding author: [email protected]

Conjugated polymers have gained great interest recently due to their fascinating properties

such as; solution processability, easy band gap alternation via structural modification, low

cost and flexibility [1]. Conducting polymers have variety of application fields like solar cells

(OPVs), electrochromic devices, biosensors and light emitting diodes [2-4]. Up to date, the

donor-acceptor (D-A) approach is verified to be the most efficient strategy in the synthesis of

conducting polymers to obtain low band gap polymers for desired applications. Recently

quinoxaline and benzodithiophene units are widely used for donor and acceptor type aromatic

heterocycles to achieve low band gap polymers. Herein, a novel multifuctional quinoxaline

and benzodithiophene comprising polymer with selenophene bridge was synthesized. The

resulting polymer was characterized with electrochemical, spectroelectrochemical and

electrochromic studies. The polymer exhibited low oxidation potential at 0.76 V with 1.74 eV

optical band gap and multichromic redox states.

References: [1] A. L. Dyer, M. R. Craig, J. E. Babiarz, K. Kiyak, J. R. Reynolds, Macromolecules 43 (2010) 4460

[2] A. C. Grimsdole, K. L. Chan, R. E. Martin, P. G. Jokisz, and A. B. Holmes, Chem. Rev.,109, 897 (2009)

[3] B. Guo, W. Li, X. Guo, X. Meng, W. Ma, M. Zhang, Y. Li, Adv. Mater. 29 (2017)1702291

[4] O. Azeri, E. Aktas, C. Istanbulluoglu, S. O. Hacioglu, S. C. Cevher, L. Toppare, A. Cirpan, Polymer 133

(2017) 60


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O-40

Physical Properties of Welding Regions in the Welded Joined TSMG Y123 + x wt%

Y211 (x=0, 20 and 30) Bulk Superconductors

B. Çakır1,2, Ş. Duman1,2*, A. Aydıner1

1 Department of Physics, Faculty of Sciences, Karadeniz Technical University,

Trabzon 61080, Turkey 2 Vocational Health High School, Artvin Çoruh University, Artvin 08000, Turkey


Physical and structural properties of welding regions of the welded joined Y123 bulks

fabricated by a top–seed–melt–growth (TSMG) method with x wt% Y211 (x=0, 20 and 30)

additions were studied in the present work. For welding process, two main samples having the

same Y211 addition and welding sample positioned between the main samples stacked and

welded thermally with a pressure source simultaneously. After the welding process the

welded samples cut into the specimens, to investigate micro structure and electromagnetic

properties of the welding regions for the samples. Almost a seamless interface, i.e. a

continuous phase, between the solder material and the main samples with a good integration

was obtained from the SEM images and pores tend to decrease out of the solder material

stating that the importance of the heating treatment. The magnetoresistivity (ρ–T)

measurements was performed in dc magnetic fields (parallel to the c-axis) up to 5 T and the

activation energies (U) were determined using the Arrhenius activation energy law from ρ–T.

The power law relationship for U with H −α was investigated. The welding process had no

negative noticeable effect on Tc of the samples at 0T, while magnetic field distortion observed

from the ρ–T curve of the specimen cutting from the 0 wt% Y211 added sample having

magnetic fluctuations is smaller than the other added specimens under applied different

magnetic field. The calculated Jc values were the same order ≈ 103A/cm2 for all samples in 0

T field at 77 K.

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O-41

The Magnetic Levitation Force Performance of YBCO Bulk by Top Seeded

Infiltration Growth at Different Temperatures

S. Baris Guner1, S. Celik2, K. Ozturk3, Ö. Öztürk4,

1Department of Physics, Faculty of Arts and Sciences, Recep Tayyip Erdogan University, Rize, TURKEY 2Department of Energy Systems, Faculty of Engineering and Architecture, Sinop University, Sinop, TURKEY 3Department of Physics, Faculty of Science, Karadeniz Technical University, Trabzon, TURKEY 4Department of Physics, Faculty of Arts and Sciences, Kastamonu University, Kastamonu, TURKEY


A top-seeded melt-growth (TSMG) process is commonly used to fabricate single domain

YBCO bulk superconductors. Pores are frequently found in the YBCO samples by TSMG

because of oxygenation process. Newly, top seeded infiltration growth (TSIG) method is

well-known to be efficient in diminishing the pore formation and in refining the size of

Y2BaCuO5 (Y211) particles distributed in YBa2Cu3Oy (Y123) matrix. In this study, the

magnetic levitation force measurements of YBCO bulk sample at ZFC (Zero Field Cooling)

and FC (Field Cooling) regimes by using our new designed magnetic levitation force

measurement system. It was used to investigate the vertical and lateral levitation forces

between a permanent cylindrical magnet and a cylindrical superconductor at different

temperatures (37, 47, 57, 67 and 77 K). Moreover, the phase and microstructures properties of

YBCO fabricated by TSIG were studied using X-ray diffraction (XRD), scanning electronic

microscope (SEM) and energy dispersive spectrometry (EDS).

Acknowledgements:

All the magnetic levitation force measurements were performed in the MLFMS designed by

the project of TUBİTAK project no: 110T622 and whose patent application number is

2013/13638.


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O-42

Structure characterization and luminescence studies of MgO:Li calcinated at different

temperatures via SCS and SG methods

V. Guckan1*, V. Altunal1, A. Ozdemir1 and Z. Yegingil1

1Department of Physics, Faculty of Art and Sciences, 01330 Balcali Saricam, Adana, Turkey

Corresponding E-mail: [email protected]

In the present study, lithium (Li) doped magnesium oxide (MgO) samples were prepared

using solution combustion synthesis (SCS) and Sol-Gel (SG) methods. Their

photoluminescence (PL) and thermoluminescence (TL) behaviors were determined after the

different calcination temperatures.

The aim of this study is to investigate the effect of different calcination temperatures on the

PL and TL sensitivities of lithium doped MgO (MgO:Li) samples in pellet and powder forms

prepared by SCS and SG methods. The structural characterization analysis of MgO:Li powder

and pellets were carried out using X-ray diffraction (XRD), Fourier transform infrared

spectroscopy (FT-IR) and Scanning electron microscope (SEM) methods. The results of these

structure analysis showed that MgO:Li samples have different crystal properties when

changing calcination temperatures were applied during the preparation of the samples.

Luminescence properties of the MgO samples which were synthesized at different calcination

temperatures were investigated by the PL and TL techniques. The maximum TL intensity of

the samples was obtained at calcination temperature of 800 and 1000 oC for the SCS and SG

methods, respectively. Uncontrolled chromium impurities were observed in MgO samples by

using PL measurements. On the PL spectrum, peaks indicating chromium (III) (Cr3+)

transmission in the red portion of the spectrum at 672, 698 and 721 nm are clearly evident [1,

2]. We investigated high dose sensitivity in these samples. Therefore, we suggest this material

as a new high dose thermoluminescence dosimeter.

References 1. V. Singh, R. Chakradhar, J. Rao, J.-J. Zhu, Studies on red-emitting Cr3+ doped barium aluminate phosphor

obtained by combustion process, Materials Chemistry and Physics, 111 (2008) 143-148.

2. T. Kato, G. Okada, T. Yanagida, Optical, scintillation and dosimeter properties of MgO translucent ceramic

doped with Cr3+, Optical Materials, 54 (2016) 134-138.


77


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14-19 October 2019

ADANA, TURKEY

O-43

The Effect of Calcination Conditions on Luminescence Efficiency of BeO Ceramics

Synthesized Using Co-Precipitation Method

V. Altunal1*, V. Guckan1, A. Ozdemir1, and Z. Yegingil1

1Cukurova University, Dept. of Physics, 01330, Adana, Turkey


BeO ceramics were synthesized by co-precipitation method. The luminescent behaviors of the

BeO ceramics prepared under different reaction conditions were investigated for radiation

dosimetry applications. The appropriate calcination temperature and time for the sol-gel

synthesis of BeO was determined as 1000 °C for 4 hours by analyzing optically stimulated

luminescence (OSL), thermoluminescence (TL) sensitivities and radioluminescence (RL)

emissions of the products. After β-irradiation, some OSL curves were found to have three

decaying components (slow, medium and fast) while some of OSL curves have two decaying

components (slow and fast). Luminescence life times and kinetic orders of the all decaying

components were found to be compatible with each other. While highly sensitive two TL

peaks were observed up to 250 °C, low sensitive four TL peaks were found up to 650 °C. The

results were compared with a commercially used BeO chip dosimeter (Thermalox 995 chip).

78


ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-44

Sol-Gel Preparation and Characterization of ZnO/Cu2O

Heterojunction Solar Cell

T. Özdal, H. Kavak

Cukurova University, Dept. of Physics, 01330, Adana, Turkey


ZnO/Cu2O heterojunction solar cell device is a good candidate for low-cost solar-energy

conversion systems with theoretical energy conversion efficiency limit is about 20% [1].

Their abundance in nature and low production costs make this device attractive to work on. In

this study, n-ZnO/p-Cu2O heterojunction solar cell devices have been produced on indium tin

oxide coated glass substrates by spin-coating and simple electrochemical deposition method

[2] for ZnO and Cu2O layer, respectively. Effect of the ZnO layer thickness and ECD duration

of Cu2O layer on the photovoltaic performance of the devices was studied on the efficiency of

the device was investigated using electrical characterization. Highly resistive i-ZnO interlayer

was deposited and the junction performance was also compared. I-V characterizations of the

devices were obtained under AM1.5 (100 mW/cm2) solar illumination.

References

1. A. Mittiga, E. Salza, F. Sarto, M. Tucci, and R. Vasanthi, Applied Physics Letters 88,

163502 (2006).

2. T. Özdal, R. Taktakoğlu, H. Özdamar, M. Esen, D. K. Takçı, and H. Kavak, Thin Solid

Films 592, 143-149 (2015).


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O-45

Structural Changes of Boron Carbide Under Shock Compression

H. Cengiz Çekil and Metin Özdemir

Çukurova University, Faculty of Sciences and Letters, Department of Physics, Adana, Turkey

E-mail: [email protected]

Atomistic non-equilibrium molecular dynamics (NEMD) simulations of shock wave

compression of boron carbide have been performed [1,2,3]. Structural changes of boron carbide

under shock compression were investigated under different velocities and temperatures in

various crystallographic directions. Simulations has been done between 0.5 km/s and 4.0 km/s

piston velocities. The shock wave is generated by the impact of an infinitely massive piston

onto the material. The dimensions of B4C used in the simulations is 3x3x120 nm3. Changes in

crystal structure has been demonstrated via radial distribution function (RDF). It is observed

that structural changes begin to appear at a piston velocity of 1.5 km/s.

References

1. F. Thevenot, Journal of the European Ceramic society, 6(4), 205-225 (1990).

2. V.Domnich, S. Reynaud, R. A. Haber, M. Chhowalla, Journal of the American

Ceramic Society, 94(11), 3605-3628(2011).

3. S. Plimpton, J Comp Phys, 117, 1-19 (1995)


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ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

O-46

Investigation of Rb substitution on the thermoelectric parameters of

BSCO Ceramic Materials

B. Özcelik1*, G. Çetin1, A. Sotelo2, M.A. Madre2

1Department of Physics, Faculty of Sciences and Letters, Çukurova University. 01330 Adana, (Turkey)

2ICMA (CSIC-Universidad de Zaragoza). C/Maria de Luna, 3. 50018-Zaragoza (Spain)


This study will address the main themes of today, such as reliability, sustainable and clean

energy. Within this objective, Bi2Sr2-xRbxCo2Oy (x=0.0, 0.025, 0.050, 0.075, 0.100 and 0.125)

materials have been produced as powder by solid state technique. From the resistivity graphic,

we can reach that pure and 0.025 Rb samples exhibit a semiconducting-like behavior

(dρ/dt<0) and the other samples exhibit a metallic-like behavior (dρ/dt>0). The Seebeck

coefficients of all samples are positive values for all temperature ranges evidencing the

conduction mechanism mainly governed by holes. The maximum power factor values have

been obtained in Rb=0.10 sample as 0.19 Mw/K2 at around 650 0C.

Keywords: Thermoelectric oxides; Resistivity, Seebeck Coefficient, Power Factor

Acknowledgement: This work is supported by Research Fund of Cukurova University,

Adana, Turkey, under grant contracts no: FBA-2019-12034


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O-47

Effect of Rb Substitution on the Structural, Physical and Superconducting Properties of

Bi-2212 Superconductor

I.Ergin1*, B. Özçelik1, M. A. Madre2, A. Sotelo2

1 Department of Physics, Faculty of Sciences and Letters, Cukurova University. 01330 Adana,

Turkey 2 ICMA (CSIC-Universidad de Zaragoza). María de Luna, 3. 50018 Zaragoza, Spain

Corresponding author: [email protected]

In this research, the effects of Rubidium (Rb) inclusion on the microstructural, physical and

superconducting properties of Bi2Sr2Ca1-xRbxCu2O8+y with x=0.0, 0.025, 0.05, 0.075, 0.10,

and 0.125, superconductor have, in detail, been studied. For this purpose, the samples were

prepared through the classical solid state reaction route. From the XRD patterns, the crystal

symmetries of samples were determined as pseudo tetragonal and consist of dominant Bi-

2212 phase together with small amount of secondary phases. SEM-EDX results have

confirmed that the major phase is related to Bi-2212, with minor amounts of secondary

phases. In magnetization versus temperature measurements, very sharp diamagnetic transition

is observed. The superconducting critical temperatures, TC, for all samples are obtained

around 80 K. From M-H measurement, it has been found that all samples have very narrow

loop areas. By using the data from M-H measurements in the Bean model, the intragranular

critical field, JC, has been determined. It has been found that the pure Bi-2212 (x=0.0) sample

shows the highest superconducting properties and the largest JC values (2,2x104 A/cm2 at 10

K).

Keywords: Bi-2212, Rubidium substitution, Magnetic Properties.


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O-48

Structural, magnetic and physical properties of Ag added Bi2Sr2Ca0.925Na0.075Cu2Oy

superconducting ceramics

B. Atilla1, B. Özçelik1, M.A. Madre2, A. Sotelo2

1Cukurova University, Dept. of Physics, 01330, Adana, Turkey 2ICMA (CSIC-Universidad de Zaragoza), Maria de Luna, 3, 50018 Saragossa, Spain

corresponding author: [email protected]

In this study Bi2Sr2Ca0.925Na0.075Cu2Oy + x wt% Ag addition with x= 0,1,3, 5 superconducting

ceramics have been prepared by sol-gel method, followed by laser floating zone (LFZ)

technique for acquiring directional growth. The obtained samples have been characterized

using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) together with energy

dispersive X-Ray (EDS) spectrometer, magneto-resistance, magnetization and magnetic

hysteresis techniques. From XRD, all samples are composed by nearly single Bi-2212 phase.

SEM-EDS analysis yields the Bi-2212 phase as a major one confirming XRD. From

magneto-resistance measurement, broadening of superconduction transition has been

observed under magnetic field between 0 and 6 T. Thermally Activated Flux Flow (TAFF)

model is used to investigate flux pinning energy of the samples. Calculated flux pinning

energies at 4T are 0.05 eV for 1 wt% Ag and 0.07 eV for 3 wt% Ag containing sample.


83


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14-19 October 2019

ADANA, TURKEY

O-49

Investigation of the Effects of Different Tip Radius and Impact Angle on Low Speed

Impact Behavior in Graphene Reinforced Composite Fabrics

Ayhan Aytaç

National Defence University, Military Academy, Department of Mechanical Engineering,

Ankara-Turkey. Corresponding Author: [email protected]

Composite materials are widely used in industry due to their superior properties. Graphene is

one of the allotropes of carbon in which a carbon atom is formed by interconnected rings,

such as a honeycomb. It has the potential and superior features to shape our near future. It is

important to examine the damage occurrence due to the different impact angle of the superior

impact fabric reinforced materials that can replace the composite materials which are

frequently used in the production of space and aircraft. Tests were performed at three different

angles (0°, 10° and 15°) and three different diameters (12,7-15, and 20mm) to investigate the

impacts with different angles and widths.

In this study, according to ASTM 7136, three different composite plates obtained by molding

of graphene impregnated denim fabrics with a layered resin were subjected to impacts

according to three different angles and tip radius. The effect behavior of each test group was

examined by force-time, force-displacement and energy-time curves. The penetration

threshold of the samples was determined using energy profile diagram. Depending on the

impact angle and tip radius, the low-speed impact behavior was compared.

Keywords: Graphene, Composite Fabric, Drop Weight Impact, Impact Angle

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ADANA, TURKEY

O-50

Examination of High Speed Test Methods and Devices Used in Ballistic Armour Tests

Kadir Aztekin

1National Defence University, Dept. of Mechanical Eng., 06654, Ankara, Turkey


Armours have been used for various protection purposes from the earliest times until today. It

is still being used. Today's modern armours vary greatly depending on the desired level of

security and the element to be protected.

There are many military standards to prove that these modern armours developed provide the

desired level of security. These standard tests are one-to-one tests and can only be performed

by certain institutions and individuals due to both cost and military constraints. Therefore,

armours undergo some laboratory tests before military standards tests. In this study, firstly

information about the history of armor tests is given. Then, the latest methods and techniques

used in modern laboratory armor tests were explained and the scope of these methods were

compared.

Keywords: Armour, Ballistic, High strain rate, Split-Hapkinson Bar, Drop test


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ADANA, TURKEY

O-51

Sol-Gel Synthesis and Electron Paramagnetic Resonance (EPR) Spectroscopy of Cu2+

and Co2+ Doped PbTiO3 Perovskites

Ebru Erünal

1Cukurova University, Dept. of Chemical Engineering, 01330, Adana, Turkey


PbTiO3 perovskites are widely used in many applications due to the ferroelectric and

photocatalytic properties [1-3]. In order to enhance these properties and provide sustainable

usage of the materials, doping with certain transition metals is a very common method. By

this way, defects are created in order to compensate the lattice charge equilibrium as a result

of replacement of doping ion with the host ion [3-4]. In this study, undoped and doped

PbTiO3 materials were synthesized through sol-gel method. The crystal structure was

analyzed with XRD for different doping amounts. For lower doping amounts, formation of

perovskite structure was verified while for higher amount doping, different phases were also

detected. Moreover, X-Band Electron Paramagnetic Resonance (EPR) spectrocopy

measurements were conducted to verify the incorporation of Co2+ and Cu2+ ions on Ti4+ sites.

This shows a probable oxygen vacancy formation accompanying this substitution to provide

the lattice charge balance.

Fig. 1: X-Band EPR Spectra of (a) Co2+ and (b) Cu2+ - doped PbTiO3 Perovskites

References 1. V. A. Chaudhari and G. K. Bichile, Smart Mater. Res., 2013,147524 (2013).

2. H. S. Bhatti, S. T. Hussain, F. A. Khan, and S. Hussain, Appl. Surf. Sci., 367, 291 (2016)

3. D. Arney, T. Watkins, and P. A. Maggard, J. Am. Ceram. Soc., 94( 5) 1483 (2011). 4. M.V. Raymond and D. M. Smyth, J. Phys. Chem. Solids, 57 (10) 1507 (1996).

Acknowledgements

This project is supported by Çukurova University FBA-2018-10647

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POSTER PRESANTATIONS

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ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

P-01

The Magnetic Phase Transition and Hysteresis Behavior of Co2TaAl Heusler Alloy

A. Duran1

1Kütahya Dumlupinar University, Dept. of Electronics and Automation, 43020, Kütahya, Turkey


In this study, Kaneyoshi approximation in the frame work of effective field theory (EFT) was

used to investigate the magnetic properties of Co2TaAl Heusler alloy. The signs of magnetic

exchange interaction constants between its components in the alloy with L21 structure [1]

were created considering the signs of magnetic moments of the components of the alloy

reported in Ref.[1]. It is calculated and plotted the temperature and magnetic field dependence

of the magnetizations of Co2TaAl Heusler alloy and its components (M(T) and M(H) curves,

respectively). The alloy exhibits a ferrimagnetic behavior without the compensation point.

Furthermore, Co2TaAl Heusler alloy at a very low temperature exhibits the magnetic

hysteresis behavior of five-steps. While hysteresis curves of its Ta2, Al1, Al2 and Co

components have a rectangular shape, that of Ta1 exhibit a hysteresis behavior with two

different coercivities. The obtained results were checked against the available theoretical and

experimental results.

Fig. 1: The L21 crystal structure of Co2TaAl [1]. Fig. 2: M(T) curves of Co2TaAl and its components.

References

1. S. A. Khandy, D. C. Gupta, Semiconductor Science and Technology 32 (12), 125019 (2017).

Ta1 Ta2 Al1 Al2 Co

-1.00

-0.80

-0.60

-0.40

-0.20

0.00

0.20

0.40

0.60

0.80

1.00

0 1 2 3 4 5

Ta1 Ta2Al1 Al2Co Co2TaAl

M

T

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ICCMMS-2019

14-19 October 2019

ADANA, TURKEY

P-02

Design, Manufacturing and Installation of Flying Saw for Steel Pipe Production Lines

M. Ilbuga1, M.P. Sezer1, H. Bircan1, B. Karakuzu1, F. Ozturk1, B. Salar1 and M. Gunes2

1Cukurova Silo Isletmeciligi ve Mak. San. Ins. Tic. Ltd. Sti., Design Center 01790, Adana, Turkey 2Adana Alparslan Turkes Bilim ve Teknoloji University, Dept. of Materials Engineering 01250, Adana, Turkey

Correspondence Author: [email protected]

Steel pipe or profile production lines turn the sheet metal into pipes by cold forming.

Generally, unless the work is machined, e.g. cold drawn and forming, during the feeding and

the work feeding means simultaneously exert the required drawing force on the work [1]. Sheet

material is turned into pipe and / or box profile form in roll form lines by desired length

cutting. This process, an important step of production, determines the production speed and

directly affects the product quality. It is necessary to cut the pipe or profile to the desired

dimensions and separate it from the continuously flowing material while it is moving. System

called flying saw machine is used to cut the moving pipe in order not to stop the line. Cutting

operation by stopping production slows down the speed considerably. Since the production

line is welded by induction welding, stop/go operations in motion leave marks on the pipe or

profile material, thus decreases quality. However, it is known that the overseas flying saw

machines used in lines do not produce the desired results in terms of cutting quality, cutting

speed and ease of use. Our flying saw machine is able to cut simultaneously without stopping

the production line. The cutting area up to 3 meters can be achieved by means of a saw blade

which increases the production speed and quality of the steel pipe or profile. With an

integration, the flying saw machine can perform drilling and threading operations on steel

pipes at the same time. At the project, using the lightest material possible for mobility and

cutting accuracy, it was excluded from the traditional materials. Instead of the movement

mechanism used in the existing systems, a movement mechanism suitable for the desired

speed has been used. With an automatic lubrication system that is not used in the existing

systems, periodic maintenance costs of the machine have been reduced. Due to the modularity

of the design, it will also be able to perform drilling, threading on pipe material with a

revision to the saw. With this modular design [2], the expectations have been met and a design

has been made that can go beyond the expectations and increase the product variety. It was

offered a cheaper, higher quality and functional product than its foreign counterpart to the

market, contributing to the reduction of imports and creating a field of use in similar

industries.

References

1. Cutting Devices for Moving Oblong Works Filed June 2, 1958 2 Sheets-sheet 1 14 Inventor Irwin Bock By

*mg Attorneys July 17, 1962 E. Bock

2. Flying Saw Design, TPE 2019/01194 (March 25, 2019), Locarno Class: 15-09, U. Deniz, Cukurova Silo

Isletmeciligi ve Mak. San. Ins. Tic. Ltd. Sti.


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P-03

Preliminary Results on Ex-situ Joint Techniques of Superconducting MgB2 wires for

Industrial Applications

C. Aksoy1, H. Yetiş2, F. Karaboğa2,3, C. Şimşek1, M. Akdoğan2, D. Avcı2, İ. Belenli2

1Karadeniz Technical University, Faculty of Technology, Electronics and Communication Engineering, 61830,

Trabzon, Turkey 2Abant Izzet Baysal University, Physics Department, Bolu, 14030, Turkey

3Abant Izzet Baysal University, Mehmet Tanrıkulu Vocational School of Health Services, Bolu, 14030, Turkey


Superconducting MgB2 wires, having a high transition temperature at 40K, are being

considered as a good candidate for magnet applications such as Magnetic Resonance Imaging

(MRI), magnetic shielding devices, flux transformers, and gradient meters. However, a

reliable joining technique between MgB2/Fe wires is a critical challenge for those

applications. Namely, high-performance superconducting joints are essential for realizing

persistent-mode magnets. In this work, we have investigated on ex-situ jointing techniques for

MgB2/Fe wires such as soldering lap joints by using PbSn and SnInBi solders and pressed in-

situ Mg+2B powder in tube method. The created joint properties were analysed along with the

raw material superconducting properties, V-I curves in the persistent mode regime and

microstructures in the joints, which is obtained by scanning electron microscopy (SEM/

EDX).

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P-04

Investigation of The Effect of Nano-Pt/SiC Addition on Magnetic Properties of MgB2

Superconductors

E. Taylan Koparan1, B. Savaskan2, S. Baris Guner3, C. Aksoy4, S. Celik5

1Zonguldak Bülent Ecevit University, Ereğli Faculty of Education, 67300 Ereğli, Zonguldak, Turkey 2Karadeniz Technical University, Energy Systems Engineering, 61830, Trabzon, Turkey

3Department of Physics, Faculty of Arts and Sciences, Recep Tayyip Erdogan University, 53100 Rize, Turkey 4Karadeniz Technical University, Electronics and Communication Engineering, 61830, Trabzon, Turkey

5Energy Systems Engineering, Faculty of Engineering and Architecture, Sinop University, 57000 Sinop, Turkey


We present here a detailed investigation of the effects of nano-Pt/SiC adding on magnetic

properties of bulk MgB2 at different temperature. All samples were prepared from

magnesium powder (99.8 %), amorphous boron powder (≥95 %), nano-Pt powder (99.9 %)

and nano-SiC powder. We used 5 wt% excess Mg powder to compensate Mg evaporation

during heat treatment. The level of added nano-Pt powder was 0, 1, 3, 5, 7 wt% of MgB2

powders and the level of added nano-SiC powder was 10 wt% of MgB2 powders. These

mixed powders were grounded for an hour and pressed into (385 MPa) pellets with a diameter

of 18 mm. The pellets were placed on Al2O3 boat, then placed inside a stainless steel tube and

vacuumed. The sintering process was carried out at 700°C for 3 h following vacuum process.

During the heat treatment, high-purity argon gas was maintained 2 bar in a stainless steel tube.

After heating process, MgB2 samples were cooled in furnace at room temperature. Tc was

investigated for the different addition level of nano-Pt/SiC from DC magnetization versus

temperature curves. The pristine sample has a Tc of 38.5 K and a sharp transition width (∆T)

which indicates a good quality and chemical homogeneity. The superconducting transition

temperature of samples added nano-Pt/SiC was determined to be 33.5 K which is about 5 K

lower than that of the pristine MgB2 sample. The magnetic field dependence of the critical

current density Jc was calculated from the M-H loops. It was found that the samples added

nano-Pt/SiC has slightly enhanced critical current density when the magnetic field is

increased.

Acknowledgment: This work was supported by the Scientific Research Coordination Unit of

Zonguldak Bulent Ecevit University of Turkey, with project No. 2016-76962555-01.


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P-05

Production of Oxygen Sparger Using Alloy C276-UNS N10276 Material Alloy

R. Bayram1, H. Bayram2, M. Gunes3, İ.Kökten4

1,2,4 Bomak Makina LTD. ŞTİ., Adana, Turkey 3Adana Alparslan Turkes Bilim ve Teknoloji University, Dept. of Materials Engineering 01250, Adana, Turkey

Corresponding Author: R. [email protected]; [email protected]

C276 is declared to be one of the most corrosion resistant material available today. It is

particularly used in a variety of environments from moderately oxidizing to strong reducing

conditions. The low Cr content is the limiting factor when dealing with strong oxidizing

environments, which means that hot, concentrated nitric acid environments are NOT

desirable. Although, C276 is said to have exceptional resistance to sulfuric acid and

hydrochloric acid, acid chlorides, solvents, formic and acetic acids, acetic anhydride, wet

chloride gas, hypochlorites and chlorine solutions. Also, it has excellent resistance to

phosphoric acid at all temperatures below boiling and at concentrations lower than 65%.

Alloy C276 shows strong resistance to pitting, stress corrosion cracking and to oxidizing

atmospheres. For seawater exposure, C276 also exhibits outstanding resistance to corrosion

especially under crevice conditions, which induce attack in other commonly used materials. 1

The welding method, applied in limited area within Turkey, has been used for Oxygen

Production Petrochemical Industry. Since the Sparger to be manufactured will operate in

Seawater environment with Hydrchloric acid, Alloy C276 is chosen as the most appropriate

material.

Fig. 1-2 : Corrosion Resistance of Alloy C-276 in HCL and Seawater2,

References:

1. https://www.corrosionmaterials.com/documents/dataSheet/alloyC276DataSheet.pdf

2 https://www.sandmeyersteel.com/images/alloy-276-spec-sheet.pdf


https://www.corrosionmaterials.com/documents/dataSheet/alloyC276DataSheet.pdf

https://www.sandmeyersteel.com/images/alloy-276-spec-sheet.pdf

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P-06

Half-Superconducting MgB2 Toroidal Core Transformer

H. Yetis1,*, M. Akdogan1, F. Karaboga2, D. Avcı1, İ. Belenli1

1Bolu Abant İzzet Baysal University, Department of Physics, 14030, Bolu, Turkey 2Bolu Abant İzzet Baysal University, Mustafa Tanrıkulu Vocational School of Health Services, 14030, Bolu,

Turkey


50kVA toroidal core transformers have been studied numerically in 2D by using the Comsol

Multiphysics software with ac/dc & heat transfer modules. Transformer is modeled as half-

superconducting in which a conventional copper wire is used for primary windings and

secondary windings are formed by using superconducting MgB2 wires having copper or iron

sheaths. The MgB2 windings are isolated from air and modeled in liquid helium environment.

AC losses are considered as a heat source and long-time tests for quenching are performed as

a function of critical current density of the MgB2 wire. Magnetic flux density profiles,

transformer current, voltage and powers are obtained for one full cycle.

Fig. 1:PL emission spectra of CYSO:Ce3+, Tb3+ fired at 1200C for 240 minusing various excitation

wavelengths.

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P-07

The Improving of the Anodic Oxidation of Aluminium Profiles with 6063 Alloy Which

be Produced by Using Secondary Raw Material

M.Ozcan1, A.Ekiz1, T.Yıldız1, M. Gunes2, D. Izcankurtaran1, V. Kayan1, B. Tunca1

1Zahit Aluminyum San. Ve Tic. A.S, Adana, Turkey 2Adana Alparslan Turkes Bilim ve Teknoloji University, Dept. of Materials Engineering 01250, Adana, Turkey


Aluminium and its alloys proceed to attain a place in industry with their increasing usage

thanks to their lightness, strength, easy formability and superior mechanical properties. The

improving of the ability of anodic oxidation Al-Mg-Si 6063 aluminium alloy systems which

belongs to 6XXX series was be aimed in this study. This study involves that flux process for

reducing of the Fe element. NaCI and KCI were be used as a flux in the casting testing. And

then florid was be used for increasing of the efficiency of flux. Na3AlF6 was be used as a

florid. Aluminium profiles with different Fe concentration were be analyzed for investigation

of the intermetallic phase after the extrusion process. Also its performed to hardness and gloss

measurements.

References 1. G.G, E.O, R.K., Resources, Conservation and Recyling, (2012)

2. H.Z., M.J.C., A.K.D., High Temperature Materials and Processes, (2012)

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P-08

K-shell Photo-effect Cross-Sections of elements between the range 29≤Z≤75 using 123.6

keV Gamma-Ray Photons

N. Kup Aylikci1, T. Depci2

1Iskenderun Technical University-ISTE, Dept. of Energy Systems Engineering, 31200, Iskenderun, Hatay, Turkey 2Iskenderun Technical University-ISTE, Dept. of Engineering Sciences, 31200, Iskenderun, Hatay, Turkey


Determination of the gamma or X-ray absorption ability of materials has gain popularity due

to technological developments in different scientific areas such as nuclear energy materials,

radiation dosimetry, health physics, and etc. It is possible to determine them using energy

dispersive X-ray florescence. This method is an easy, practical and non-destructive method. In

this study, X-ray florescence was used to calculate total atomic K-shell photo-effect cross

sections and photo-effect cross-sections using experimental K X-ray production cross-

section values. For experimental measurements, the elements were irradiated by 123.6 keV

gamma rays from 57Co annular radioactive source. The emitted K X-rays were counted by an

Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. The semi-empirical calculated

values were compared with the data in the literature. The uncertainties in the measurements

were calculated to be less than 6% for K X-ray production cross-section values and good

agreement was obtained.

Keywords: Total atomic photo-effect cross-sections, K shell photo-effect cross-sections, 57Co

radioactive source


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14-19 October 2019

ADANA, TURKEY

P-09

Investigation of superconducting, microstructural and Vickers microhardness

properties of CoFe2O4 doped Y123 superconducting ceramics

O. Ozturk1, O.Çiçek1, F. Bulut2, R. Terzioglu3, S. Celik4

1Kastamonu University, Department of Electrical and Electronics Engineering, 37100 Kastamonu, Turkey

2Sinop University, Central Research Laboratory 57100 Sinop, Turkey 3Bolu Abant Izzet Baysal University, Department of Electrical and Electronics Engineering, 14280 Bolu, Turkey

4Sinop University, Department of Energy Systems Engineering, 57100 Sinop, Turkey

*Corresponding Author: [email protected]

Different proportions of CoFe2O4 nanoparticles are substituted with Cu in the Y123 structure

produced by classical solid state reaction method (YBa2Cu3-x(CoFe2O4)xO7-δ, x=0.05 and

0.15). The effects of doping process on the crystal structure were examined by calculating

lattice parameters of produced samples by X-ray diffraction (XRD) analysis. The surface

morphology and grain orientations of the samples were investigated by scanning electron

microscopy (SEM). Vicker’s microhardness analysis, was performed by using different loads

to the analysis of mechanical properties. The calculated microhardness values were found to

increase with the doping ratio. The undoped sample showed Reverse Indentation Size Effect

(RISE) behavior, but Indentation Size Effect (ISE) behavior obtained for CoFe2O4 doped

samples. The yield strength and elastic (Young) modulus values were calculated by using the

Vickers microhardness test data. In addition, Meyer’s law, elastic-plastic deformation (EPD)

model and Hays-Kendall (HK) approach were applied to obtain the independent

microhardness values.

Keywords: YBCO, Y123, high temperature superconductors, solid state reaction method,

CoFe2O4, Vickers, Meyer’s law, EPD, HK


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P-10

Enhancement on thermoelectric properties of BaTiTaO by Ca doping

Sh. Rasekh1, A. Kovalevsky1, F.M. Cosa2, A. Natoli1


Aveiro, 3810-193 Aveiro, Portugal 2i3N, Departamento de Física, Universidade de Aveiro, 3810-193 Aveiro, Portugal


Thermoelectric (TE) materials are characterised by their ability to directly transform heat into

electric energy, thus making them suitable for energy harvesting/recovery applications. The

performances of these materials is evaluated by the dimensionless figure-of-merit, ZT

(ZT=𝛼2T/; T: Absolute temperature; 𝛼: Seebeck coefficient; : electrical resistivity; :

thermal conductivity).

Among promising ceramic n-type TE materials, ones based on TiOx family are most studied

due to their performances while they contain nontoxic and environment friendly substances as

compared with other thermoelectric systems. They are characterised by a perovskite crystal

structure with cubic, tetragonal or orthorhombic symmetry. These materials show very

attractive thermoelectric properties when they sintered in reductive atmosphere, producing

oxygen vacancies in their structure.

In this work the effects of different degree of Ca doping in Ba site on their microstructure and

thermoelectric properties will be explored. The purpose of dopant implantation is mainly to

modify the unit cell parameter through substituting cation with lower ionic radii ones. These

adjustments will lead to increase the free charge carrier concentration, enhancing overall

thermoelectric properties.

(Ba1-xCax)yTi0.85Ta0.15Oδ ceramics (x = 0, 0.10, 015, and 0.20, y = 1-0.925) were prepared

by solid-state reaction route and sintered in forming gas N2/H2 at 1350°C. Presented phases

were identified from XRD recorded data while materials characterization have been done

through microstructural studies (SEM/EDS), thermal analysis, measurements of electrical

conductivity and Seebeck coefficient as function of temperature.

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P-11

Physical, Chemical and Biological Characterization of Ti Implant Surfaces Coated with

Bioactive PHBV

S. Tozan Ruzgar1, A. Akkaya2

1EgeUniversity, Dept. of Biotechnology, 35100, İzmir, Turkey 2EgeUniversity, Dept. of Biochemistry, 35100, İzmir, Turkey

[email protected]

The aim of this work is to develop an antibiotic coating on the surface of a titanium grade 4

plate to determine its antibacterial and surface properties. A promising approach for reducing

the occurrences of infections is to provide the surfaces of biomedical devices and dental

implants with features that are unfavorable for bacterial attachment and proliferation.

Therefore, to combine the antibacterial properties of antibiotic-loaded Poly(3-

hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) with titanium, as the base material for

implants, in order to obtain biomimetic surfaces with antibacterial activity. The titanium

surfaces were linked to both PHBV and hydroxyapatite using electrospinning technique. This

attachment was carried out by firstly activating the titanium surfaces with sodium hydroxide.

Further functionalization of the activated surfaces was carried out with antibiotic which is

vancomycin hydrochloride loaded the titanium surface [1]. The success of the surfaces

functionalization as well as the different superficial linkages was confirmed by means of the

following characterization methods [2]: contact angle, scanning electron microscopy (SEM)

(Fig. 1), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy

(XPS). The antibacterial properties of the titanium treated surfaces were tested by means of an

in vitro antibacterial assay using a Gram + and Gram – bacteria. Finally, drug release kinetic

models were detected.

Fig. 1: SEM image of Vancomycin HCl, antibiotic-loaded polymer coated titanium implant at different

magnifications (V = 23 kV; v = 3ml / h; 5% PHBV, 0.1% HA) (a) 500, (b) 1000, (c) 2000, (d) 5000 (e)

Pore size, (f) Contact angle for water droplets on the flat surface of an antibiotic-loaded polymer

coated titanium implant surface

References 1. H.W. Kim1, J.C Knowles2, H.E. Kim3, Journal of Materials Science 16: 189-195(2005)

2. R.S Faibish1, W. Yoshida2, and Y. Cohen, Journal of Colloid and Interface Science 256, 341–350 (2002)


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P-12

Synthesis and deposition of conductive transparent oxides (TCOs) to be used in

the manufacture of high efficiency solar photovoltaic devices (IGNITE)

D. Fraga1, T.Stoyanova1, J. González1, S. Porcar1 and J.Carda1

1Universitat Jaume I,, Dept. of Inorganic and Organic Chemistry, 12071, Castellón, Spain


Transparent conducting oxides (TCOs) that can be functionalized depending on the requisites

of the electrical contact to be implemented. Outstanding good optical characteristics have

been provided by indium tin oxide SnO2:In (ITO) and fluorine doped tin oxide SnO2:F

(FTO). Particularly, ITO is the most widely used TCO, because of its two key properties, its

electrical conductivity and optical transparency. However, the presence of scare In element in

its structure make it undesirable for large-scale industrial application. In contrast, TCO based

on doped ZnO films are widely used because they are relatively cheap, can be textured for

light trapping and readily produced for large-scale coatings [1-3]. They allow tailoring of the

absorption in the UV region (transparency in the VIS region) and have a low temperature of

synthesis and deposition. In addition, ZnO is resistant to oxygen and moisture, has very good

optical transparency, easy solution processing, having a flexible host crystal lattice able to

accept a variety of dopant substitutions. It is established that the process of thin films doping

with Al, In, Ga improves its electrical properties. Recently transition metals (V, Nb) are used

as dopants of ZnO to obtain functionalized TCOs (FOX).

Here, we proposed the development of wide band gap (Eg>3.3 eV) TCOs layer by chemical-

based sustainable approaches based on a range of dopings (Al, In, Ga, Li, Ag), due to their

high transparency (>85%) and suitable conductivity ranging between 200-2000 (Scm-1).

References

[1] Giraldo, S. et al., Advanced Energy Materials 5, 1501070 (2015)

[2] Kim, H.-S., Seo, J.-Y. & Park, N.-G., he Journal of Physical Chemistry C 120, 27840-27848 (2016

[3] G. Masmitja et al., Energy Procedia 92, 956-961 (2016

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international conference on condensed matter and … · limiter (fcl) with 2g hts conductor winding...

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