Investigation of the Magnetic and Mechanical Properties of Nano-Y2O3 Doped Bismuth Based Superconductor Materials

Year 2023, Volume: 12 Issue: 1, 153 - 162, 27.03.2023

Emine Burcu Cevizci , Kemal Kocabaş , Sedt Kurnaz

https://doi.org/10.46810/tdfd.1205088

Abstract

The effects of nano-Y2O3 addition on the structural, superconducting, magnetic and mechanical properties of Bi-2223 superconducting system were investigated in this study. Bulk polycrystalline samples with general formula of Bi1.8Pb0.4Sr2Ca 2Cu3O10 + δ + (Y2O3) with ( x; weighted % 0.0-0.2-0.4-0.8-1.0) were prepared by solid state reaction method. X-ray diffraction (XRD), Scanning Electron microscope (SEM), Energy dispersive X-ray spectroscopy (EDX) mesurement, Vibrating sample mesurement (VSM), Resistance- temperature (ρ-T) mesurement and Vickers microhardness mesurement (VHM) were also used for samples structural characterizations. XRD patterns showed that both Bi -2223 and Bi-2212 phases are coexist in the samples. While a lattice parameter increased, c lattice parameter decreased with increasing of nano-Y addition. In SEM photographs, it is seen that granular structure is plate-like in all samples and increase in the amount of additive, presence of point particles on the layered particles is seen more clearly. Hole concentration values that calculated from ρ-T mesurement, ranges from 0.113 to 0.160. While amount of nano-Y increased, critical transition temperatures decreased. VSM results showed that critical current density values increase with the addition of Nano-Y. VHM results showed that the hardness value increased until x= 0.4% additive sample and decreased after this value.

Keywords

nano- Y2O3, BSSCO, Critical Current Density, Hole concentration, Microhardness

Thanks

We would like to thank Dr. Özlem Bilgili (Dokuz Eylül University Physics Department) and Lecturer Hasan Durmuş (İzmir University of Economics) for their valuable ideas and suggestions during our study.

Nano-Y2O3 Katkılı Bizmut Esaslı Süperiletken Malzemelerin Manyetik ve Mekanik Özelliklerinin İncelenmesi

Abstract

Bu çalışmada nano-Y2O3 ilavesinin Bi-2223 süperiletken sisteminin yapısal, süperiletken, manyetik ve mekanik özellikleri üzerindeki etkileri araştırılmıştır. Bi1.8Pb0.4Sr2Ca 2Cu3O10 + δ + (Y2O3) ile ( x; ağırlıkça % 0,0-0,2-0,4-0,8-1,0) genel formülüne sahip polikristal örnekler katıhal reaksiyon yöntemiyle hazırlandı. Örneklerin yapısal karakterizasyonları için X-ışını kırınımı (XRD), Taramalı Elektron mikroskobu (SEM), Enerji dağılımlı X-ışını spektroskopisi (EDX) ölçümü, Titreşimli numune ölçümü (VSM), Direnç-sıcaklık (ρ-T) ölçümü ve Vickers mikrosertlik ölçümü (VHM) yapılmıştır. XRD desenleri, örneklerde hem Bi -2223 hem de Bi2212 fazlarının bir arada bulunduğunu gösterdi. Nano-Y ilavesinin artmasıyla a örgü parametresi artarken, c örgü parametresi azalmıştır. SEM fotoğraflarında tüm örneklerde tanecik yapısının plaka benzeri olduğu görülmekte ve katkı miktarındaki artmasıyla tabakalı yapı üzerinde nokta şeklinde partiküllerin varlığı daha net görülmektedir. ρ-T ölçümünden hesaplanan delik konsantrasyonu değerleri 0,113 ile 0,160 arasında değişmektedir. Nano-Y miktarı artarken kritik geçiş sıcaklıkları azalmıştır. VSM sonuçları Nano-Y eklenmesiyle kritik akım yoğunluğu değerlerinin arttığını göstermektedir. VHM sonuçları, sertlik değerinin x= % 0,4 katkılı örneğe kadar arttığını ve bu değerden sonra azaldığını göstermiştir.

Keywords

nano- Y2O3, BSSCO, Critical Current Density, Hole concentration, Microhardness

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