Compound oxide high temperature superconducting material and a method for preparing same

摘要

A superconducting material and a process for producing a superconducting material comprising a compound oxide represented by the general formula: (Ba, (gamma))x((alpha),(beta))1-x(epsilon)yCu1-yO3-z in which "(gamma)" represents an element of the IIa group of the periodic table except Ba, an atomic ratio of (gamma) to Ba, being selected in a range between 1% and 90%, "(alpha)represents Y or La, "(beta)" represents an element of the IIIa group of the periodic table but is different from (alpha), an atomic ratio of (beta) to (alpha) being selected in a range between 1 and 90%, "(epsilon)" represents a metal element of the IIIb group of the periodic table, x, y and z are numbers each satisfies ranges of O<=x<=1, O<=y<=1, and O<=z<=1 respectively, and the expression of (Ba, (gamma)) and ((alpha), (beta)) mean that the respective elements occupy predetermined sites in a crystal in a predetermined proportion.