Superconductor technology: apparatus – material – process – High temperature – per se
Patent
1993-01-22
1994-05-31
Gorski, Joseph M.
Superconductor technology: apparatus, material, process
High temperature , per se
29599, 252518, 252521, 505739, 505742, 505782, H01L 3924
Patent
active
053170083
ABSTRACT:
A method of manufacturing a bismuth oxide superconductor, wherein a molded body of a bismuth oxide superconducting substance comprising bismuth, an alkaline earth metal, copper, and oxygen or a precursor thereof is subjected to a heat treatment for producing a superconducting phase and then subjected to one step selected from (1) a step of cooling the heated body from 700.degree. C. to 200.degree. C. in an atmosphere having an oxygen partial pressure of not less than 0.1 atm at a cooling rate of not less than 10.degree. C./min, (2) a step of cooling the heated body from 700.degree. C. in an atmosphere having an oxygen partial pressure of less than 0.1 atm at a cooling rate of less than 10.degree. C./min, and (3) a step of cooling the heated body, and then performing a heat treatment for the cooled heated body in an atmosphere having an oxygen partial pressure of not more than 0.1 atm at a temperature from 700.degree. C. to 200.degree. C.
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Gorski Joseph M.
The Furukawa Electric Co. Ltd.
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