Preparation of copper alkoxides and sol/gel precursors of superc

Details Preparation of copper alkoxides and sol/gel precursors of superc Preparation of copper alkoxides and sol/gel precursors of superc

1989-02-03

1991-04-09

Lovering, Richard D.

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

25231501, 2523151, 423263, 423493, 501 12, 505735, 505778, 505809, 556113, B01J 1300, C01G 302, H01L 3912

Patent

active

050065084

ABSTRACT:
The invention relates to the preparation of high purity, chloride- and alkali metal-free copper (II) alkoxides by means of the reaction of an alcoholic alkali metal alkoxide solution with copper (II) fluoride; ammoniating the resulting solution to render soluble the resulting copper (II) alkoxide; and filtering the resulting solution to obtain an alkali metal- and chloride-free alcoholic copper (II) alkoxide solution. The resulting solution is useful in the preparation of superconducting compound such as yttrium-barium-copper oxide superconductor.

REFERENCES:
patent: 4266978 (1981-05-01), Prochazka
patent: 4839339 (1989-06-01), Bunker et al.
Fujiki et al.: "Preparation of a High-TcY-Ba-Cu-O Superconductor Using Colloidal Methods", Japanese Journal of Applied Physics, vol. 26, No. 7, Jul. 1987, pp. L1159-L1160.
Zheng et al.: "Superconducting YBa.sub.2 Cu.sub.3 O.sub.7-x Fibers Prepared by the Sol-Gel Process", Extended Abstracts High Temperature Superconductors II, Materials Research Soc., Apr. 5-9, 1988, pp. 93-96.
Wu et al.: "Possibility of High Tc Copper Fluoride Oxide Superconductors", Mat. Res. Soc. Proc., vol. 99, 1988 Materials Reserach Society, pp. 623-626.

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