Synthesis of Bi-Ca-Sr-Cu-O superconductive material

Details Synthesis of Bi-Ca-Sr-Cu-O superconductive material Synthesis of Bi-Ca-Sr-Cu-O superconductive material

1989-08-28

1992-03-17

Bell, Mark L.

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505782, 505729, 505742, 501126, 501123, 252521, 423593, C01B 1332, C01F 1102, C01G 2900, C01G 302

Patent

active

050968793

ABSTRACT:
A mixture comprised of an alkali chloride solvent and reactants comprised of bismuth sesquioxide, calcium oxide, strontium oxide and copper oxide, or precursors therefor, wherein the reactants are formulated to produce a superconducting reaction product, is heated to melt the chloride solvent in which the reactants then dissolve and react precipitating a Bi-Ca-Sr-Cu-O superconductive material which is comminuted to produce a sinterable powder.

REFERENCES:
patent: 4152281 (1979-05-01), Arendt et al.
patent: 4534956 (1985-08-01), Arendt et al.
patent: 4942152 (1990-07-01), Itozaki et al.
patent: 5039653 (1991-08-01), Jackson et al.
Schneemeyer et al, "Growth of Superconducting Single Crystals in the Bi--Sr--Ca--Cu--O System from Alkali Chloride Fluxes", Nature vol. 332, Mar. 31, 1988 pp. 422-424.
Katsui et al, "Solution Growth of Bi--Si--Ca--Cu--O Compounds Using Alkali Chlorides", Journal of Crystal Growth 91(1988) 261-263.
Balestrine et al, "Growth of Textured Film of Bi.sub.2 Si.sub.2 CaCu.sub.2 O.sub.8x from RCl Solution", Appl Phys Lett 54(20), 15 May 1989 pp. 2041-2042.
Chen et al, "Evaporation Kinetics of a Halide Flux System for the Growth of Bi--Si--Ca--Cu--O Superconductor Crystals", Jour Crystal Growth 96(1989) 547-551.

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