| 摘要 |
PURPOSE:To increase the mechanical strength, to obtain a high critical current density, and to improve the stability and the reliability, by removing a metal coverage ot a superconductor, and applying a heat treatment in the ambiance including oxygen. CONSTITUTION:A baked material made by baking and crystallizing a perovskite structure of oxide superconductor 2 including a rare earth element is powdered, the resultant powder is filled in a metal pipe in which plural metal wires 3 are arranged in the longitudinal direction of the pipe, and both ends are sealed. Then, after the metal pipe is processed to reduce the diameter up to a desired outer diameter, the outer metal pipe is removed, and then a heat treatment is applied in the ambiance including oxygen. After this baking, it is cooled gradually, oxygen is introduced to the oxygen-short rooms in the crystalline structure of the oxide superconductive wire 1, and the superconductive property is improved. |
