Low temperature (T lower than 950.degree. C.) preparation of mel

Details Low temperature (T lower than 950.degree. C.) preparation of mel Low temperature (T lower than 950.degree. C.) preparation of mel

1994-12-29

1997-01-07

Harriman, Erin M.

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

With melting

505500, 505725, 505781, 252521, C04B 35653, C04B 35505

Patent

active

055916988

ABSTRACT:
A melt textured growth process for bulk YBCO at temperatures below 950.degree. C. is provided so that the material (YBCO) can be combined with silver to produce bulk superconductors by providing a combination of precursors that provide melting at 950.degree. C. or lower temperatures. After melting of the thoroughly mixed precursors, the sample is cooled in a controlled temperature environment. The process makes it possible to use metallic silver or other normal metals such as gold, as components in the fabrication of long YBCO wires and cables while achieving a high critical current density.

REFERENCES:
patent: 4994437 (1991-02-01), Torii et al.
patent: 5032570 (1991-07-01), Ogata et al.
patent: 5137867 (1992-08-01), Ray et al.
patent: 5432143 (1995-07-01), Pellerin et al.
Shimoyama et al "Addition of new Pinning Center to Unidirectionally Melt Solidified Y-Ba-Cu-O Superconductor" Jap. Journ. of App. Physics, vol. 29, No. 11, Nov. 1990 pp. L1999-2001.
Matsuzaki et al "High-T.sub.c Superconductor Prepared by Oxidation of a Mechanically Allayed Nonequilibrium fcc Ba.sub.2 YCu.sub.3 Phase" Jap. Journ. of App. Physics, vol. 27, No. 5, May '88 pp. L779-L782.

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