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

S. Nariki, Naomichi Sakai, M. Kita, M. Fujikura, Masato 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
JournalSuperconductor Science and Technology
Volume19
Issue number7
DOIs
Publication statusPublished - 2006 Jul

Fingerprint

Superconducting materials
Liquid phase sintering
Texturing
Densification
Crack initiation
Strength of materials
liquid phase sintering
crack initiation
densification
Cracks
Fabrication
liquid phases
Liquids
cracks
fabrication

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Advances in enlargement of melt-textured Gd-Ba-Cu-O superconductors. / Nariki, S.; Sakai, Naomichi; Kita, M.; Fujikura, M.; Murakami, Masato; Hirabayashi, I.

In: Superconductor Science and Technology, Vol. 19, No. 7, 07.2006.

Research output: Contribution to journalArticle

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