Patent ID: 7964532

Claim:
A method of production of an RE123-based oxide superconductor which comprises (a) bringing part of a mixed material in which at least RE 2 BaO 4 and a Ba x —Cu y —O z -based material are mixed into contact with a holding member, then (b) drawing this one time or more, then (c) heating this in an atmosphere containing oxygen together with the holding member to a temperature of the dissolution temperature of the Ba x —Cu y -O z -based material or more to form a conductive layer containing an REBa 2 Cu 3 O 7-δ -based oxide superconductor, where, RE is one type or more of elements selected from La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, and Y.