Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Process of making wire – tape – cable – coil – or fiber
Patent
1994-02-14
1995-03-28
King, Roy V.
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Process of making wire, tape, cable, coil, or fiber
505430, 505704, 505742, 505782, 427 62, 29599, 1741251, H01L 3924, H01B 1204
Patent
active
054017173
ABSTRACT:
This invention is related to the preparation of an elongate conductor having a silver sheath, and a core of an aligned polycrystalline oxide superconductor having the approximate formula Bi.sub.2-x Pb.sub.x Sr.sub.2-a L.sub.a+b Ca.sub.1-b Cu.sub.2 O.sub.y where y is from 7.5 to 8.5, and L is a lanthanide. A powder mixture is formed comprised of a first portion of a superconducting bismuth oxide compound that can be reaction-sintered to form the core oxide superconductor, and a second portion of oxides suitable for reacting with the first portion to form the core oxide superconductor. An elongate body is formed having a silver sheath, and a core of the mixture. The body is deformed to align the first portion, and heated to reaction-sinter the first and second portions to form the core oxide superconductor.
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Wai Lo and B. A. Glowacki, A Study of the Formation Processes of the 2212 Phase in the Bi-based Superconductor Systems, Physica C 193 (1992) pp. 253-263.
S. X. Dou, H. K. Liu, M. H. Apperley, K. H. Song and C. C. Sorrell, Critical Current Density in Superconducting Bi-Pb-Sr-Ca-Cu-O Wires and Coils, Supercond. Sci. Technol 3 (1990) pp. 138-142.
Yamada et al, "Properties of Ag-Sheathed Bi-Pb-Sr-Ca-Cu-O Superconducting Tapes Prepared by the Intermediate Pressing Process", Jpn. J. Appl. Phys. vol. 29, No. 3, Mar. 1990, pp. L456-L458.
General Electric Company
King Roy V.
Magee Jr. James
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