Shaped and fired articles of YBa.sub.2 Cu.sub.3 O.sub.7
AssigneeMinnesota Mining and Manufacturing Company
InventorKenton D. Budd
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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.
Claims7
A fine diameter fiber comprising orthorhombic superconducting YBa.sub.2 Cu.sub.3 O.sub.x, wherein x is in the range of from 6.5 to 7.2 and further wherein said fiber has a diameter greater than O.mu. and less than or equal to about 50.mu..
A continuous fiber comprising orthorhombic superconducting YBa.sub.2 Cu.sub.3 O.sub.x, wherein x is in the range of from 6.5 to 7.2 and further wherein said fiber has a diameter greater than O.mu. and less than or equal to about 50.mu..
Dependencies are inferred from the claim text.