C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/139
C04B 35/00 (2006.01) C04B 35/45 (2006.01) C04B 35/64 (2006.01) H01L 39/24 (2006.01)
Patent
CA 1315075
Abstract of the Disclosure A method of manufacturing a bismuth type oxide superconductor, wherein a molded body of a bismuth type 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°C to 200°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°C/min, (2) a step of cooling the heated body from 700°C in an atmosphere having an oxygen partial pressure of less than 0.1 atm at a cooling rate of less than 10°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 tempera- ture from 700°C to 200°C.
606064
Ridout & Maybee Llp
The Furukawa Electric Co. Ltd.
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