JPS6489118A - Manufacture of oxide type superconductive material - Google Patents

Abstract

PURPOSE:To produce a superconductive layer evenly throughout the whole length and to increase the mechanical strength by applying a heat treatment to diffuse Cu of a coverage layer formed at the outer side of a base material, Cu and O of a copper membrane, and element A and element B of a mixing material layer each other, in the manufacture of an A-B-Cu-O system oxide superconductive material. CONSTITUTION:In the manufacture of an oxide superconductive material of a general formula A-B-Cu-O (where A is one or more of the periodic table group IIIa elements such as Y, Sc, La, Yb, Er, Eu, Ho, and Ba, and B is an element of alkaline earth metal elements such as Be, Mg, Ca, Sr, and Ba), a coverage layer consisting of Cu is formed at the outer surface of a tape-form base material made of Ni. Then on the surface of the coverage layer, a copper oxide membrane is formed. After that, on the surface of the copper oxide membrane, a mixing material layer including a compound of element A and a compound element B is formed to make a laminate material. And then, an intermediate heat treatment is applied to the laminate material at a specific temperature, and the final treatment is applied following that. In such a way, elements in the intermediate layers react to diffuse further to produce a superconductor layer, and a superconductive wire material can be obtained.