Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1988-11-23
1991-02-05
Lieberman, Paul
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
252521, 423604, 423617, 423635, 501123, 505782, C01F 1102, C01G 302, C01G 2900
Patent
active
049904884
ABSTRACT:
Black crystal compositions having the empirical composition Bi.sub.a Sr.sub.b Cu.sub.c O.sub.d are described where a+b+c=1, A=0.36-0.557, b=0.098-0.496, c=0.1-0.4 and d=approximately 1+a/2. These compositions have a superconducting transition temperature T.sub.c for superconductivity of greater than 20 K and contain a principal phase which crystallizes in the orthorhombic system. They can be prepared from the mixture of the oxides in the atomic ratio stated by heating to 700.degree.-1000.degree. C.
REFERENCES:
C. Michel et al., "Superconductivity in the Bi-Sr-Cu-O System", Z. Phys. B. 68, 421-423 (1987).
Adam Joachim
Becker Winfried
Schwarz Martin
von Schnering Hans-Georg
Waldschmidt Elfi
Boyd John
Hoechst Aktiengesellschaft
Lieberman Paul
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