| 摘要 |
PURPOSE:To obtain an oxide superconductor having a high critical temperature in production of an oxide superconductor of perovskite type containing an Ln element, an AE element and Cu, by blending the elements with a fluorine- containing ammonium salt as a raw material. CONSTITUTION:In producing an oxide superconductor of perovskite structure containing a Ln element (Ln is at least one of Y, La, Sc, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu), an AE element (at least one of Ba, Ca and Sr) and Cu, the elements are blended with a fluorine-containing ammonium salt as a raw material and oxygen is partially replaced with nitrogen. The amount of fluoride replaced is <=about 90atom. wt.% oxygen. For example, NH4F, NH4BF or (NH4)2SiF6, etc., may be cited as the fluorine-containing ammonium salt. |
