Abstract
Phase change of rapidly solidified Bi-Sr-Ca-Cu-O amorphous ceramics was investigated. Crystalization took place at 500°C, following shrinkage above glass transition. First cystalized phase was 2.4nm phase. While 3.Onm phase appeared at about 700°C, 2.4nm phase was still dominant below 800°C. When 2.4nm phase disappeared, smaller particles and fibre began to merge with coarser particles. Above 830°C 3.Onm phase were dominant, but phase separation took place in an atomized particle. Eventually long bill-like (Ca, Cu)Ox crystal grew out from each atomized particle, and Bi-rich part was simultaneously formed, which gave lower transition-melting temperature than that of mixed and calcined powders.
