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

K. Iida, J. Yoshioka, M. Murakami

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3529-3532
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume11
Issue number1 III
DOIs
Publication statusPublished - 2001 Mar 1
Event2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
Duration: 2000 Sep 172000 Sep 22

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Keywords

  • Coarsening
  • Fine dispersion
  • J
  • Nd-123
  • Nd-422
  • T

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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