Effects of synthesis conditions on microstructure of a YBa2Cu3Ox superconductor by partial melting process

Kiyoshi Sawano, Mitsuru Morita, Katsuyoshi Miyamoto, Kenji Doi, Akihiko Hayashi, Masato Murakami, Shoichi Matsuda

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The synthesis conditions of a partial melting process for a bulk YBa2Cu3Ox (123) superconductor are discussed in terms of the microstructure and superconducting properties. The overall process consists of the partial melting, in which Y2BaCuO5 (211) and a liquid phase form, and subsequent slow cooling for the formation of the 123 grains by a peritectic reaction of 211 with liquid. Melt-quenched and sintered starting materials were examined to understand the difference in microstructural development. The finely and homogeneously dispersed 211 grains present in melt-quench-derived samples are considered to be effective in reducing defects by promoting a smooth and uniform peritectic reaction. As a result, melt-quench-derived materials showed better critical current densities than sinter-derived materials.

Original languageEnglish
Pages (from-to)1028-1033
Number of pages6
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume97
Issue number10
Publication statusPublished - 1989 Dec 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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