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

K. Iida, J. Yoshioka, Masato Murakami

Research output: Contribution to journalArticle

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
Externally publishedYes

Fingerprint

Superconducting materials
Oxygen
Grain growth
Partial pressure
partial pressure
oxygen
Ostwald ripening
refining
Coarsening
Chemical analysis
Refining
plots
slopes
augmentation
shift
Liquids
matrices
liquids
Direction compound

Keywords

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

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Refinement of Nd-422 particles in Nd-Ba-Cu-O bulk superconductor. / Iida, K.; Yoshioka, J.; Murakami, Masato.

In: IEEE Transactions on Applied Superconductivity, Vol. 11, No. 1 III, 03.2001, p. 3529-3532.

Research output: Contribution to journalArticle

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