Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1992-10-26
1993-09-14
Silbaugh, Jan H.
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
156 48, 156 89, 156158, 505739, 505782, 264261, 264332, H01L 3912
Patent
active
052448762
ABSTRACT:
Method for joining parts of ceramic high-temperature superconductor material of the composition Bi.sub.(2+a-b) (Sr.sub.1-c) Ca.sub.c) .sub.(3-a) Pb.sub.b Cu.sub.(2+d) O.sub.x, where a is 0 to 0.3, b is 0 to 0.5, c is 0.1 to 0.9 and d is 0 to 2 and x has a value depending on the state of oxidation of the metals present, the end faces of the parts located at a gap spacing apart from one another are heated by means of a fuel gas/oxygen flame to temperatures from 750.degree. to 875.degree. C. Simultaneously, a rod of the same material above the spacing gap is heated until the melt thereof drips off into the gap between the end faces of the two parts, completely filling the gap. At least the joint region between the two parts is then heat-treated for 7 to 100 hours at temperatures between 780.degree. and 850.degree. C.
REFERENCES:
patent: 4797510 (1989-01-01), Mihelich
patent: 5004722 (1991-04-01), Tallman
patent: 5051397 (1991-09-01), Sato et al.
patent: 5053384 (1991-10-01), Schwartzkopf
patent: 5079226 (1992-01-01), Sakai et al.
patent: 5116810 (1992-05-01), Joshi et al.
Japanese Abstract No. 01-183083., Patent Abstracts of Japan published Oct. 23, 1989.
Bock Joachim
Holzem Johannes
Horst Werner
Preisler Eberhard
Fiorilla Christopher A.
Hoechst Aktiengesellschaft
Silbaugh Jan H.
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