Improved superconducting performance of Ag-added nano-diamond doped MgB 2

研究成果: Conference contribution

抜粋

The performance improvement of disk- shaped bulk MgB 2 superconductor by means of a nanoscopic diamond powder have been investigated in our previous studies, using a single-step solid-state reaction process. To further improve the critical current density (J c ), we added Ag with varied compositions of 3.5, 4.0, 4.5 wt.% in the optimized composition of 0.8 wt.% of nanodiamond added MgB 2 sample and synthesized in pure Ar atmosphere. All samples were sintered at an optimized temperature of 775°C for 3 hours. X-ray diffraction patterns conformed to the main phases of MgB 2 samples with additional phases observed in the Ag-added samples. Microstructures were observed with high magnification in field emission scanning electron microscope (FE-SEM) and indicated AgMg nanoparticles are embedded in the MgB 2 -nanodiamond matrix, which was correlated with XRD studies. Among, the 4.0 wt.% Ag doped sample exhibited the highest J c of 389 kA/cm 2 at 20 K. The present result showed that Ag addition to MgB 2 -nanodiamond is an effective pinning medium for bulk MgB 2 and might thus be attractive for a further performance improvement of the bulk MgB 2 material.

元の言語English
ホスト出版物のタイトルSuperconductivity and Particle Accelerators 2018
編集者Dariusz Bocian, Ryszard S. Romaniuk
出版者SPIE
ISBN(電子版)9781510627833
DOI
出版物ステータスPublished - 2019 1 1
イベント4th Conference on Superconductivity and Particle Accelerators, SPAS 2018 - Krakow, Poland
継続期間: 2018 11 272018 11 29

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
11054
ISSN(印刷物)0277-786X
ISSN(電子版)1996-756X

Conference

Conference4th Conference on Superconductivity and Particle Accelerators, SPAS 2018
Poland
Krakow
期間18/11/2718/11/29

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • これを引用

    Dadiel, J. L., Miryala, M., & Murakami, M. (2019). Improved superconducting performance of Ag-added nano-diamond doped MgB 2 : D. Bocian, & R. S. Romaniuk (版), Superconductivity and Particle Accelerators 2018 [110540I] (Proceedings of SPIE - The International Society for Optical Engineering; 巻数 11054). SPIE. https://doi.org/10.1117/12.2525216