Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1991-10-25
1993-04-06
Beck, Shrive
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
505733, 505742, 427 62, 427375, 4274192, 4274193, 4273761, 427576, B05D 302
Patent
active
052003892
ABSTRACT:
A method for manufacturing a superconducting article, comprising the steps of: forming a first layer comprising a mixture of LnBa.sub.2 Cu.sub.3 O.sub.x and Ln.sub.2 BaCuO.sub.x ' on the surface of a substrate, said Ln being an optional rare earth element; then forming a second layer comprising a mixture of at least CuO and BaCuO.sub.2 on the surface of the first layer; and then melting the mixture in the second layer to cause the resultant melt of the mixture in the second layer to diffusion-react with Ln.sub.2 BaCuO.sub.x ' in the first layer so as to convert the first and second layers into a film of a superconducting substance comprising LnBa.sub.2 Cu.sub.3 O.sub.x ; thereby manufacturing a superconducting article comprising the substrate and the film of the superconducting substance formed on the surface of the substrate.
REFERENCES:
Jin et al., "High critical currents in Y-Ba-Cu-O superconductors" Appl. Phys. lett. 52(24) Jun. 1988 pp. 2074-2076.
Severin et al., "Superconducting YBa.sub.2 Cu.sub.3 O.sub.x thin layers by solid state diffusion," Mat. Res. Bull. vol. 23 (1988) pp. 707-717.
Kumakura et al., "Ba-Y-Cu-O superconducting Tape Prepared by Surface diffusion Process", Jpn. J. Appl. Phys. 26(7) Jul. 1987 L1172-1173.
Tachikawa et al., "Preparation of B-Va-Cu oxide superconducting composite tapes by a diffusion process", MRS vol. 99 Nov. 1987 pp. 727-730.
Kyoji Tachikawa et al., "Fabrication of Superconducting Y-Ba-Cu Oxide Through an Improved Diffusion Process", Japanese Journal of Applied Physics, vol. 27, No. 8, Aug., 1988, pp. L1501-L1503.
Kabasawa Makoto
Kosuge Shigeyoshi
Ono Moriaki
Shinbo Yukio
Tachikawa Kyoji
Beck Shrive
King Roy V.
NKK Corporation
The Tokai University Juridicial Foundation
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