Refinement of Nd-422 particles in Nd-Ba-Cu-O bulk superconductor

K. Iida, J. Yoshioka, M. Murakami

研究成果: Conference article査読

2 被引用数 (Scopus)

抄録

We have investigated the effect of oxygen partial pressure, the initial composition, and the addition of CeO2 and/or Pt on the grain growth of Nd4Ba2Cu2O10 (Nd-422) in the Ba-Cu-O liquid. Logarithmic plots of the mean diameter of Nd-422 under various oxygen levels as a function of the holding time showed the power law behavior with the slope of 1/3, which suggested that the grain growth of Nd-422 could be explained in terms of the Ostwald ripening theory. A reduction of oxygen partial pressure, the shift of the initial composition toward Barich direction, and a combined addition of Pt and CeO2 could suppress the coarsening of Nd-422. Furthermore, a combination of these techniques was found to be effective in refining the Nd-422 in the Nd-123 matrix, which led to an enhancement of Jc values.

本文言語English
ページ(範囲)3529-3532
ページ数4
ジャーナルIEEE Transactions on Applied Superconductivity
11
1 III
DOI
出版ステータスPublished - 2001 3月
外部発表はい
イベント2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
継続期間: 2000 9月 172000 9月 22

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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