| 摘要 |
PURPOSE:To increase the superconduction transition temp. of cubic spinel type Li-Ti-O oxide, to nearly prevent the oxide from undergoing a chemical change and to extend the application in the field of a superconducting element, etc., by substituting bivalent Cu for part of Ti in the oxide. CONSTITUTION:This oxide superconducting material has a compsn. represented by a chemical formula Lix(Tiy-Cuz)Ou (where x=0.8-1.2, y<2.2, z<=2.2, y+z=1.8-2.2, u=2.2-5, Ti is Ti<3+> and/or Ti<4+> and Cu is Cu<2+>). It is formed by substituting Cu for part of Ti in cubic spinel type Li-Ti-O oxide represented by a formula Li1+a(Ti2-a)O4 (where a=-0.2-+0.2) and ensures stable transition to superconductivity at a high temp. |
