Mg Difüzyonu Tekniği ile Türkiye’de Saflaştırılmış Bor Kullanılarak Üretilen MgB2 için B Saflığının Süperiletkenlik Özellikleri Üzerine Etkisi

Özlem Çiçek

doi:10.35234/fumbd.1429915

Research Article

Effect of B purity on MgB2 superconductor prepared by Mg diffusion technique using Turkish Boron

Year 2024, , 521 - 534, 30.09.2024

Özlem Çiçek

https://doi.org/10.35234/fumbd.1429915

Abstract

MgB₂bulks were synthesized by the Mg diffusion method under exactly the same conditions, using B powder of three different purities purified in Turkey. In laboratory scale studies, high purity starting powders are used. For large-scale production, low purity powders are better in terms of production costs. In this study, the effect of low purity grade B on the Mg diffusion method was examined. The microstructural properties of MgB₂ samples produced by heat treatment at 850 °C for 10 hours were examined by XRD analysis. Rietveld refinement was performed on these results, and lattice parameters were obtained around a=b=3.08 Å, c=3.52 Å. Crystal sizes and microstrains were calculated using the Scherrer and Williamson-Hall formulas. In addition, by magnetic measurements, the T_c was determined to be 38.74 K, and the J_c (B = 0) at 20 K was determined to be 3.14x10⁵ A/cm² for the sample using an 86.70% purity B source. F_p was calculated, and pinning mechanisms were examined using the Dew-Hughes scaling approach. The dominant pinning mechanism was determined to be grain boundaries and non-superconducting points. It has been shown that high J_c and T_c values, which are important for relevant technologies, can be achieved with the 86.70% purity of the B source purified in Turkey.

Keywords

MgB2, B purity, Rietveld purification, critical current density

Ethical Statement

I declare that this work is an original work, the idea of the work belongs to me, all experimental studies were carried out by me with the support of TÜBİTAK 2219, all stages of data collection, analysis and presentation of information have been carried out by me in accordance with the principles and rules of scientific ethics, I have cited all data and information not obtained within the scope of this study and that I have included these sources in the bibliography.

Supporting Institution

TUBITAK

Project Number

TÜBİTAK’ın 2219-Yurt Dışı Doktora Sonrası Araştırma Burs Programı

Thanks

It was prepared from the results of the study conducted with the support of TÜBİTAK's 2219-Overseas Postdoctoral Research Scholarship Program. I would like to thank TÜBİTAK for this support.

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Mg Difüzyonu Tekniği ile Türkiye’de Saflaştırılmış Bor Kullanılarak Üretilen MgB2 için B Saflığının Süperiletkenlik Özellikleri Üzerine Etkisi

Year 2024, , 521 - 534, 30.09.2024

Özlem Çiçek

https://doi.org/10.35234/fumbd.1429915

Abstract

MgB₂ süperiletken külçeleri, Türkiye’de saflaştırılmış olan üç farklı saflıkta B tozu kullanarak tümüyle aynı koşullarda Mg difüzyon yöntemiyle sentezlendi. Laboratuvar ölçekli çalışmalarda çoğunlukla yüksek saflıkta başlangıç tozları kullanılmaktadır. Büyük ölçekli üretim için yüksek saflıktaki başlangıç tozları üretim maliyeti açısından büyük bir yük getirmektedir. Bu çalışmamızda Mg difüzyon yöntemi için B düşük saflık derecesinin etkisi incelenmiştir. 850 °C’de 10 saatlik ısıl işlem sonucu üretilen MgB₂ külçe numunelerinin, mikro yapısal özellikleri XRD analizleri ile incelenmiştir. XRD sonuçları Rietveld yöntemiyle arıtılarak örgü parametreleri a=b=3,08 Å, c=3,52 Å civarında elde edilmiştir. Kristal boyutları ve mikro gerinimleri Scherrer ve Williamson-Hall formülleri kullanılarak hesaplanmıştır. Ayrıca manyetik özellikleri incelendiğinde, %86,70 saflıkta B kaynağı kullanılan numune de T_c değeri 38,74 K ve 20 K’de J_c(B=0) değeri ise 3,14x10⁵ A/cm² olarak tespit edilmiştir. Manyetik ölçümlerden F_p hesaplanmış ve çivilenme mekanizmaları Dew-Hughes'un ölçeklendirme yaklaşımı ile irdelenmiştir. Numunelerimizin tümünde baskın çivilenme mekanizması tane sınırları ve süperiletken olmayan nokta çivilenme mekanizmaları olduğu tespit edilmiştir. İlgili teknolojiler için önemli olan yüksek J_c ve T_c değerlerine %86,70 saflıkta Türkiye’de saflaştırılmış olan B kaynağı ile ulaşılabileceği gösterilmiştir.

Keywords

MgB2, B Saflığı, Rietveld Arıtımı, Kritik Akım Yoğunluğu, Çivilenme Mekanizması

Ethical Statement

Bu çalışmanın, özgün bir çalışma olduğunu; çalışma fikrinin tarafıma ait olduğunu, tüm deneysel çalışmaların TÜBİTAK 2219 desteği ile tarafımca yapıldığını, veri toplama, analiz ve bilgilerin sunumu olmak üzere tüm aşamalarından bilimsel etik ilke ve kurallarına uygun davranarak tarafımca yapıldığını, bu çalışma kapsamında elde edilmeyen tüm veri ve bilgiler için kaynak gösterdiğimi ve bu kaynaklara kaynakçada yer verdiğimi beyan ederim.

Supporting Institution

TÜBİTAK

Project Number

TÜBİTAK’ın 2219-Yurt Dışı Doktora Sonrası Araştırma Burs Programı

Thanks

TÜBİTAK’ın 2219-Yurt Dışı Doktora Sonrası Araştırma Burs Programı desteği ile yapılan çalışma sonuçlarından hazırlanmıştır. Bu desteği için TÜBİTAK'a teşekkür ederim.

References

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There are 78 citations in total.

Details

Primary Language	Turkish
Subjects	Physical Metallurgy, Material Characterization
Journal Section	MBD
Authors	Özlem Çiçek 0000-0001-9350-3456
Project Number	TÜBİTAK’ın 2219-Yurt Dışı Doktora Sonrası Araştırma Burs Programı
Publication Date	September 30, 2024
Submission Date	February 1, 2024
Acceptance Date	May 4, 2024
Published in Issue	Year 2024

Cite

APA	Çiçek, Ö. (2024). Mg Difüzyonu Tekniği ile Türkiye’de Saflaştırılmış Bor Kullanılarak Üretilen MgB2 için B Saflığının Süperiletkenlik Özellikleri Üzerine Etkisi. Fırat Üniversitesi Mühendislik Bilimleri Dergisi, 36(2), 521-534. https://doi.org/10.35234/fumbd.1429915
AMA	Çiçek Ö. Mg Difüzyonu Tekniği ile Türkiye’de Saflaştırılmış Bor Kullanılarak Üretilen MgB2 için B Saflığının Süperiletkenlik Özellikleri Üzerine Etkisi. Fırat Üniversitesi Mühendislik Bilimleri Dergisi. September 2024;36(2):521-534. doi:10.35234/fumbd.1429915
Chicago	Çiçek, Özlem. “Mg Difüzyonu Tekniği Ile Türkiye’de Saflaştırılmış Bor Kullanılarak Üretilen MgB2 için B Saflığının Süperiletkenlik Özellikleri Üzerine Etkisi”. Fırat Üniversitesi Mühendislik Bilimleri Dergisi 36, no. 2 (September 2024): 521-34. https://doi.org/10.35234/fumbd.1429915.
EndNote	Çiçek Ö (September 1, 2024) Mg Difüzyonu Tekniği ile Türkiye’de Saflaştırılmış Bor Kullanılarak Üretilen MgB2 için B Saflığının Süperiletkenlik Özellikleri Üzerine Etkisi. Fırat Üniversitesi Mühendislik Bilimleri Dergisi 36 2 521–534.
IEEE	Ö. Çiçek, “Mg Difüzyonu Tekniği ile Türkiye’de Saflaştırılmış Bor Kullanılarak Üretilen MgB2 için B Saflığının Süperiletkenlik Özellikleri Üzerine Etkisi”, Fırat Üniversitesi Mühendislik Bilimleri Dergisi, vol. 36, no. 2, pp. 521–534, 2024, doi: 10.35234/fumbd.1429915.
ISNAD	Çiçek, Özlem. “Mg Difüzyonu Tekniği Ile Türkiye’de Saflaştırılmış Bor Kullanılarak Üretilen MgB2 için B Saflığının Süperiletkenlik Özellikleri Üzerine Etkisi”. Fırat Üniversitesi Mühendislik Bilimleri Dergisi 36/2 (September 2024), 521-534. https://doi.org/10.35234/fumbd.1429915.
JAMA	Çiçek Ö. Mg Difüzyonu Tekniği ile Türkiye’de Saflaştırılmış Bor Kullanılarak Üretilen MgB2 için B Saflığının Süperiletkenlik Özellikleri Üzerine Etkisi. Fırat Üniversitesi Mühendislik Bilimleri Dergisi. 2024;36:521–534.
MLA	Çiçek, Özlem. “Mg Difüzyonu Tekniği Ile Türkiye’de Saflaştırılmış Bor Kullanılarak Üretilen MgB2 için B Saflığının Süperiletkenlik Özellikleri Üzerine Etkisi”. Fırat Üniversitesi Mühendislik Bilimleri Dergisi, vol. 36, no. 2, 2024, pp. 521-34, doi:10.35234/fumbd.1429915.
Vancouver	Çiçek Ö. Mg Difüzyonu Tekniği ile Türkiye’de Saflaştırılmış Bor Kullanılarak Üretilen MgB2 için B Saflığının Süperiletkenlik Özellikleri Üzerine Etkisi. Fırat Üniversitesi Mühendislik Bilimleri Dergisi. 2024;36(2):521-34.

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