Patent ID: 6034036
Filing Date: 2000-03-07
Classification: C30B,H01L,Y10S

Abstract:
A method of manufacturing an oxide superconductor having high critical temperature in atmospheric ambiance, comprising:determining in a preliminary step a relationship between (i) a composition of a Ba--Cu--O-containing solvent, (ii) a composition of an equilibrium liquid-phase of a melted composition comprising (a) material including at least one kind of rare-earth elements (RE) as a composition element and (b) said Ba--Cu--O-containing solvent and (iii) a composition of a crystal of a RE123 system oxide superconductor grown from said melted composition in atmospheric ambiance, for at least two different Ba/Cu molar ratios of said Ba--Cu--O-containing solvent,after said preliminary step, providing a starting composition comprising (a) starting material including at least one kind of rare-earth elements as a composition element and (b) a starting Ba--Cu--O-containing solvent,adjusting the Ba/Cu molar ratio of said starting Ba--Cu--O-containing solvent in order to control the amount of mutual substitution between the at least one kind of rare-earth elements and Ba based on said relationship, andperforming crystallization in atmospheric ambiance, wherein said starting composition is melted, cooled and solidified to manufacture a RE123 system oxide superconductor.