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

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

研究成果: Article査読

25 被引用数 (Scopus)


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.

ジャーナルSuperconductor Science and Technology
出版ステータスPublished - 2006 7月 1

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 凝縮系物理学
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学


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