| 摘要 |
PURPOSE:To obtain a superconducting material turning into superconductive state at >=77 deg.K, by calcining, crushing, granulating and compression molding a powdery mixture composed of three specific kinds of element components and baking the molded material. CONSTITUTION:The objective superconducting material is produced by (1) mixing a powder composed mainly of Y and belonging to (A1) the 1st component composed of Y and one or more elements selected from Sc, La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, a powder composed mainly of elements belonging to (A2) the 2nd component composed of Ba element and a powder composed mainly of elements belonging to (A3) the 3rd component composed of one or more elements selected from Cu, Zn, Ni, Co, Fe, Pd, Ag and Cd, (2) calcining the mixture at a temperature lower than the main baking temperature, (3) finely pulverizing, granulating and forming the calcined powder and (4) baking the formed article in an oxidative atmosphere at 950-1,200 deg.C in such a manner as to form a sintered material having K2NiF4 structure including monoclinic crystal and composed of the components A1, A2 and A3 of formulas and oxygen component. |
