Advances in enlargement of melt-textured Gd-Ba-Cu-O superconductors

S. Nariki, N. Sakai, M. Kita, M. Fujikura, M. Murakami, I. Hirabayashi

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We investigated the fabrication of melt-textured Gd-Ba-Cu-O bulk superconductors with the employment of a Gd2BaO4 (Gd210)-BaCuO2-CuO precursor. This enabled us to synthesize a very large Gd-Ba-Cu-O bulk superconductor, 140 mm in diameter. The trapped field distribution measured at 77 K revealed that the sample had no serious cracks, and the maximum field was 2.3 T. The formation behaviour and depressing mechanism of cracking were studied using sintered Gd210-containing precursors. The Ba-Cu-O component in the precursor melted at around 900 °C. The formation of such a liquid phase enhanced the densification of the precursor by liquid phase sintering. The mechanical strength of the sintered precursor was increased compared to the conventional Gd123-Gd211 precursor. This will be effective in preventing crack formation in the texturing process of large single-grain samples. The superconducting properties of the bulk sample fabricated from Gd210-containing precursor have been discussed.

Original languageEnglish
Pages (from-to)S500-S505
JournalSuperconductor Science and Technology
Volume19
Issue number7
DOIs
Publication statusPublished - 2006 Jul 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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