Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – With melting
Patent
1994-12-29
1996-03-05
Fiorilla, Christopher A.
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
With melting
264 82, H01L 3924
Patent
active
054967996
ABSTRACT:
A method for making a rare earth superconductive composite which includes a matrix of REBa.sub.2 Cu.sub.3 O.sub.7-x grains and fine particles of RE.sub.2 BaCuO.sub.5 dispersed therein. The method includes a step of forming a compacted mass of powder particles of REBa.sub.2 Cu.sub.3 O.sub.7-x and powder particles of RE.sub.2 BaCuO.sub.5, each of which has an average diameter not greater than 6 .mu.m, and a maximum diameter not greater than 20 .mu.m. The compacted mass is heated to temperature higher than an incongruent melting temperature of the REBa.sub.2 Cu.sub.3 O.sub.7-x and lower than an incongruent melting temperature of RE.sub.2 BaCuO.sub.5, and is gradually cooled such that fine particles of RE.sub.2 BaCuO.sub.5 are dispersed in REBa.sub.2 Cu.sub.3 O.sub.7-x grains. The mass is annealed in an atmosphere containing oxygen.
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Hirabayashi Izumi
Yoshida Manabu
Fiorilla Christopher A.
International Superconductivity Technology Center
NGK Insulators Ltd.
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