Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1991-03-07
1993-08-03
King, Roy
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
505704, 505733, 505740, 505742, 427 62, 4274432, 427117, 65 2, 65 33, B05D 118, C03B 3700
Patent
active
052329011
ABSTRACT:
There is provided a method of producing a protective metal coated or covered superconducting ceramic wire by applying a finely pulverized protective metal-dispersed polymeric resin onto the surface of a glass wire in amorphous state of metal oxides capable of being converted into superconductive ceramic, heating the wire to remove the polymeric resin therefrom to obtain the wire having a metal powder coating thereon, and heat-treating the wire to become superconductive. The coating is easily conducted without damaging the excellent productivity of the so-called melt-quenching and preform wire-drawing process for producing a superconducting ceramic wire.
REFERENCES:
patent: 4975416 (1990-12-01), Onishi et al.
patent: 5010053 (1991-04-01), Maroni
Zheng et al., "Bi.sub.4 Ca.sub.3 Sr.sub.3 Cu.sub.4 Oy ceramic fibers from crystallization of glasses", Appl. Phys. lett. 55(12) Sep. 1989 pp. 1255-1257.
Japanese Journal of Applied Physics, vol. 27, No. 12, Dec. 1988, pp. 2293-2295, Tokyo, JP; T. Komatsu et al.: "Preparation of High-T.sub.c Superconducting Bi-Pb-Sr-Ca-Cu-O Ceramics by the Melt Quenching Method".
Physica C Superconductivity, vol. 161, No. 1, Oct. 1989, pp. 71-75; W. Gao et al.: "Synthesis of Bi-Pb-Sr-Ca-Cu oxide/silver superconducting microcomposites by oxidation of metallic precursors".
Japanese Journal of Applied Physics, Supplements, vol. 28, No. 12, Dec. 1989, pp. 2204-2206, Tokyo, JP; M. Onishi et al.: "Preparation of Bi.sub.1.5 SrCaCu.sub.2 O.sub.x glass fibers using melt-quenched glasses".
Solid State Communications, vol. 72, No. 1, 1989, pp. 113-116; A. Rojek et al.: "115 K Superconductivity in Bi-Pb-(Ag,Nb,Sb)-Sr-Ca-Cu-O Systems".
Chigusa Yoshiki
Kohgo Takashi
Onishi Masashi
Watanabe Minoru
King Roy
Sumitomo Electric Industries Inc.
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