PROCESS FOR FABRICATING SUPERCONDUCTING CERAMICS MATERIALS

摘要

A R-A-Cu-O based superconducting ceramics is fabricated as follows. First, a starting powder is provided and molded to form a molded body. Subsequently, the molded body is sintered in an oxygen-poor atmosphere with the partial pressure of oxygen being below 0.2 atm and then heat-treated in an oxygen-rich atmosphere with the partial pressure of oxygen being above 1 atm to thereby obtain ceramics having an increased density and improved superconducting characteristics. The ceramics is optionally subjected to cooling under specified cooling conditions in order to increase characteristics of the ceramics.