Method for making rare earth superconductive composite

摘要

A method for making a rare earth superconductive composite which includes a matrix of REBa2Cu3O7-x grains and fine particles of RE2BaCuO5 dispersed therein. The method includes a step of forming a compacted mass of powder particles of REBa2Cu3O7-x and powder particles of RE2BaCuO5, each of which has an average diameter not greater than 6 mu m, and a maximum diameter not greater than 20 mu m. The compacted mass is heated to temperature higher than an incongruent melting temperature of the REBa2Cu3O7-x and lower than an incongruent melting temperature of RE2BaCuO5, and is gradually cooled such that fine particles of RE2BaCuO5 are dispersed in REBa2Cu3O7-x grains. The mass is annealed in an atmosphere containing oxygen.