Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1988-11-23
1992-10-20
Bell, Mark L.
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
501 10, 501 41, 505733, 505782, C03C 1002, C03C 312, H01B 108
Patent
active
051570149
ABSTRACT:
A method of preparing a high temperature superconductor from an amorphous phase. The method involves preparing a starting material of a composition of Bi.sub.2 Sr.sub.2 Ca.sub.3 Cu.sub.4 Ox or Bi.sub.2 Sr.sub.2 Ca.sub.4 Cu.sub.5 Ox, forming an amorphous phase of the composition and heat treating the amorphous phase for particular time and temperature ranges to achieve a single phase high temperature superconductor.
REFERENCES:
Matsushita et al.; "Superconductor Glass-Ceramic By Melting-Quenching Method", Translation from Nikkan Kogyo Shimban, Mar. 16, 1988, 4 pages.
Komatsu et al.; "High-T.sub.c Superconducting Glass Ceramics Based on the Bi-Ca-Sr-Cu-O System", Japan Journal Applied Physics, vol. 27, No. 4, Apr. 1988, pp. L550-L552.
Minami et al.; "Glass Formation of High T.sub.c Compound BiCaSrCu.sub.2 O.sub.x by Rapid Quenching" Japan Journal Applied Physics, vol. 27, No. 5, May 1988, pp. L777-L778.
Inoue et al.; "Production of Bi-Sr-Ca-Cu-O Glasses by Liquid Quenching & Their Glass Transition & Structured Relaxation", Japan Journal Applied Physics, vol. 27, No. 6, Jun. 1988, pp. L941-L943.
Garzon et al.; "Amorphous-to-Crystalline Transformations in Bismuth-Oxide-Based High T.sub.c Superconductors"; Appl. Phys. Lett., vol. 53, No. 9, Aug. 29, 1988, pp. 805-807.
Hinks et al.; "Preparation of Bi-Sr-Ca-Cu-O Superconductors from Oxide-Glass Precursors" Appl. Phys. Lett, vol. 53, No. 5, Aug. 1, 1988, pp. 423-425.
Akamatsu et al.; "Instantaneous Preparation of Superconducting Thick Films through Melts in the Bi-Ca-Sr-Cu-O System", Japan Journal Appld. Phys, vol. 27, No. 9, Sep. 1988, pp. L1696-L1698.
Abe et al.; "Superconducting Glass-Ceramic Rods in BiCaSrCu.sub.2 O.sub.x Prepared by Crystallization Under a Temperature Gradient"; Appl. Phys. Lett, vol. 53, No. 14, Oct. 3, 1988, pp. 1341-1342.
Zheng et al.; "Bi.sub.4 Sr.sub.3 Ca.sub.3 Cu.sub.4 O.sub.16 Glass and Superconducting Glass Ceramics"; Physical Review B, vol. 38, No. 10, Oct. 1, 1988, pp. 7166-7168.
Arch Development Corp.
Bell Mark L.
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