Effect of Sintering Time on the Optimal Synthesis Condition in MgB2

J. Ishiwata, M. Muralidhar, N. Koshizuka, K. Inoue, M. Murakami

研究成果: Conference article査読

抄録

The present investigation has focused on methods to improve the critical current density (Jc) of the disk-shape bulk MgB2 superconductor by optimizing sintering conditions. The samples have been synthesized using a two-step process. The samples are sintered at 775oC for 3 h in pure argon atmosphere, followed by re-sintering at 660oC for 24 to 100 hours. X-ray diffraction showed that all the samples re-sintered are single phase and homogenous. The magnetization measurements confirm a sharp superconducting transition with Tc (onset) at around 37 K. The critical current density (Jc) for MgB2 samples increases with increasing the re-sintering time at 660 oC, in that the highest Jc value of 170 kA/cm2 at 20 K was obtained in the sample re-sintered at 660 oC for 100 h.

本文言語English
ページ(範囲)102-105
ページ数4
ジャーナルPhysics Procedia
58
DOI
出版ステータスPublished - 2014
イベント26th International Symposium on Superconductivity, ISS 2013 - Tokyo, Japan
継続期間: 2013 11 182013 11 20

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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