Method for the preparation of precursors for superconductors and

Details Method for the preparation of precursors for superconductors and Method for the preparation of precursors for superconductors and

1993-07-30

1996-01-02

Bonner, C. Melissa

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

Utilizing sol or gel

505445, 505512, 505501, 505446, 505734, 505735, 423593, C04B 35624, C04B 35453

Patent

active

054808626

ABSTRACT:
Method for the preparation of a precursor for a superconductor, comprising the addition of a condensation product to an aqueous solution of metal salts, the total or partial removal of water from the mixture thus obtained, the subsequent processing of the viscous mass obtained after having removed part of the water or the calcination of the solid gel obtained after having substantially removed all the water, wherein the condensation product is a product of esterification of citric acid with ethylene glycol prepared separately and the solution of metal salts substantially is a solution of acetates in water and acetic acid.

REFERENCES:
patent: 4866031 (1989-09-01), Bolt et al.
patent: 5236891 (1993-08-01), Hikata et al.
Liu et al "Application of Gel Technology in Preparation of High T.sub.c Pervochite Superconductors", High Temperature Superconductors, MRS Symp Proc., vol. 99, 1988 (no month).
Physica C vol. 190, No. 1 & 2, Dec. 1991, Amsterdam, NL pp. 124-125.
Solid State Communications, vol. 67, No. 6, Aug. 1988, London UK pp. 595-602.
Patent Abstract of Japan, vol. 13, No. 549 (C-662)7 Dec. 1989 and JPA-1 226 724-abstract.
Japanese Journal of Applied Physics Letters, vol. 29, No. 2, Feb. 1990, Tokyo, JP pp. 280-283.

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