Fibres of YBa2 Cu3 O7.

摘要

Shaped articles of superconducting YBa2Cu3O7 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 YBa2Cu3O7.