High critical current density in Y-Ba-Cu-O bulk superconductors with very fine Y211 particles

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

研究成果: Article査読

65 被引用数 (Scopus)

抄録

We have succeeded in enhancing the critical current density (Jc) of melt-textured Y-Ba-Cu-O superconductors by employing ultra-fine Y211 powder as precursor. The Y211 starting powders were reduced down to 110 nm in diameter with ball-milling. Single-grain Y-Ba-Cu-O samples up to 33 mm in diameter were fabricated from the precursors containing finely milled Y211 powders. The Y211 inclusions in the melt-textured samples could be refined by decreasing the particle size of the Y211 starting powders. The maximum value of Jc at 77 K was 1.1 × 105 A cm-2 in a self-field. However, the size reduction of Y211 led to an inhomogeneous distribution of Y211 particles, in which the volume fraction of the Y211 phase greatly decreased near a seed crystal. An Ag-added bulk sample 33 mm in diameter exhibited a high trapped magnetic field of 1.6 T at 77 K.

本文言語English
ページ(範囲)S30-S35
ジャーナルSuperconductor Science and Technology
17
2
DOI
出版ステータスPublished - 2004 2 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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