| 摘要 |
PURPOSE:To obtain an oxide superconductor compsn. causing quick superconductivity transition at an arbitrary temp. of >=40K by using an oxide having a specified compsn. contg. Tl, Ba, La and Cu. CONSTITUTION:This oxide superconductor compsn. is represented by a general formula TlBa1+xLa1-xCuOy (where -0.2<=x<=0.6) and is produced as follows: powders of Tl2O3, RaO, La2O3 and CuO are mixed so as to prepare a mixture having a compsn. represented by the general formula and the mixture is press- molded and heat-treated at 800-910 deg.C. |
