Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1991-02-28
1993-01-26
Ryan, Patrick J.
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
428426, 428432, 428433, 428457, 428688, 428901, H01B 1200
Patent
active
051822555
ABSTRACT:
Shaped articles of superconducting YBa.sub.2 Cu.sub.3 O.sub.7 are made by a sol-gel process from a sol that is a mixture of an aqueous solution of barium hydroxide, a compatible aqueous solution of copper carboxylate, and at least one of a compatible aqueous solution of yttrium carboxylate and an aqueous suspension of colloidal oxide of yttrium. The sol has a Y:Ba:Cu molar ratio of approximately 1:2:3. After adjusting the concentration of the sol, it is formed into a shaped article which is dried and then fired to convert it into orthorhombic superconducting YBa.sub.2 Cu.sub.3 O.sub.7.
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Evans Elizabeth
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Co.
Ryan Patrick J.
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