Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Process of making wire – tape – cable – coil – or fiber
Patent
1993-09-27
1994-11-29
King, Roy V.
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Process of making wire, tape, cable, coil, or fiber
505431, 505430, 505704, 505742, 427 62, 29599, 1741251, H01L 3924, H01B 1300
Patent
active
053690893
ABSTRACT:
Disclosed herein is a method of preparing an oxide superconducting wire comprising the steps of coating a powder material for forming an oxide superconductor with a metal, performing deformation processing on the metal-coated powder material thereby obtaining a tape-type wire material, superposing a plurality of such tape-type wire materials, performing first heat treatment on the plurality of superposed tape-type wire materials while simultaneously diffusion-bonding the metallic coats to each other, then performing deformation processing on the plurality of superposed tape-type wire materials, and performing second heat treatment on the plurality of deformation-processed tape-type wire materials. Preferably the oxide superconductor to be obtained is a bismuth oxide superconductor having a 2223 composition in a composition of Bi--Sr--Ca--Cu or (Bi,Pb)--Sr--Ca--Cu, and the powder material consists of a superconducting phase, which is mainly composed of a 2212 phase, and non-superconducting phases.
REFERENCES:
M. Okada et al. "Fabrication of Ag-Sheathed Ba-Y-Cu Oxide Superconductor Tape" Japanese Journal of Applied Physics Letters vol. 27, No. 2, Feb. 1988, pp. L185-L187.
H. Sekine et al. "Metalliargical Studies and Optimization of Critical Current Density in Bi-(Pb)-Sr-Ca-Cu-O Superconductors" Japanese Journal of Applied Physics, vol. 28, No. 7, Jul. 1989, pp. 1185-1188.
M. Mimura et al. "Improvement of the Critical Current Density of the Silver Sheathed Bi-Pb-Sr-Ca-Cu-O Superconducting Tape" Applied Physics Letter, vol. 54, No. 16, 17 Apr. 1989, pp. 1582-1584.
M. K. Wu et al. "Superconductivity at 93K in a New Mixed-Phase Y-Ba-Cu-O Compound System at Ambient Pressure" Physical Review Letters, Col. 58, No. 9, 2 Mar. 1987 pp. 908-910.
Mizuno et al, "Superconductivity of Bi.sub.2 Si.sub.2 Ca.sub.2 Cu.sub.3 Pb.sub.x O.sub.y (X=0.2, 0.4, 0.6), " Jpn. J. Appl. Phys. 27(7) Jul. 1988 pp. L1225-L1227.
Kumakura et al, "Bi(Pb)-Sr-Ca-Cu-O Superconducting Composite Tapes Prepared by the Powder Method Using an Ag Sheath," J. Appl. Phys. 67(7) Apr. 1990 pp. 3443-3447.
Hikata Takeshi
Mukai Hidehito
Sato Ken'ichi
King Roy V.
Sumitomo Electric Industries Ltd.
LandOfFree
Method of preparing oxide superconducting wire does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of preparing oxide superconducting wire, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of preparing oxide superconducting wire will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-74127