Crystalline Phases Formed in the Partially Melted States of Bi-Sr-Ca-Cu-O

Abstract
Partially melted states of Bi-Sr-Ca-Cu-O were investigated by SEM-EDX analysis and X-ray measurements on rapidly quenched samples in which the partially melted states were preserved. The 30 Å phase was found to decompose into a Bi-rich liquid phase and crystalline phases of Sr-Ca-Cu-O in the partial melt. The crystalline phases were assigned to Sr1-x Ca x CuO2 (x\fallingdotseq0.5) or (Ca1-x Sr x )2CuO3 (x<0.1) depending on the starting compositions, and the Bi-rich liquid phase led to the 24 Å phase on crystallization.

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