MANUFACTURE OF OXIDE SUPERCONDUCTOR

摘要

PURPOSE:To prevent the critical current density of an oxide superconductor from lowering by causing a low viscous material or solution to penetrate into cracks generated through an oxide layer re-crystallized or crystallized, and applying laser beam for re-crystallization or crystallization. CONSTITUTION:A film of an oxide superconducting material 2 e.g. of Y Ba Cu O is formed on an yttrium stabilized zilconia base 1. The film is then irradiated with laser beam to re-crystallize or crystallize the material 2. Thereafter, a solution 4 of naphthene acid yttrium, naphtene acid barium and naphthene acid copper is applied on the outside of the material 2, and the material 2 is irradiated with laser beam to form a crystallized layer 5. Lowering of critical current density is thus prevented that may be caused by cracks liable to form through the oxide superconductor, and the mechanical stability of the oxide superconductor is enhanced.