Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1990-10-17
1992-04-28
Lieberman, Paul
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
505739, 505782, 252518, 252521, H01L 3912
Patent
active
051089858
ABSTRACT:
Disclosed is a process for the preparation of a composite metal oxide superconductor, in which a composite metal oxide composition comprising Bi, Pb, Sr, Ca and Cu and further containing an alkali metal at a specific ratio is used as the starting material, and this composite metal oxide composition is molded and fired. According to this process, precipitation of the 80 K phase and other impurities is controlled, and a superconductor containing a large quantity of the 110 K phase and a high critical temperature is obtained.
REFERENCES:
Ramakrishna et al., "Synthesis, Properties and Microstructure of the-100k Bi(Pb)-Sr-Ca-Cu Oxide Superconductor", Physica C, vol. 158, 1987, pp. 203-210.
Ashizawa et al., "Variation of Composition in a Bi(Pb)-Sr-Ca-Cu-O Grarn and the Influence of Mg and Ba Doping on Its Superconductivity", JJAP vol. 28, No. 7, Jul. 1989 pp. L1140-L1143.
Iino Yuji
Imura Hiromi
Matsunaga Yoshinori
Nagano Saburo
Kyocera Corporation
Lieberman Paul
Swope Bradley A.
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