The subsolidus phase diagram of the BiO_1.5-SrO-CuO system at 840°C in air

Abstract

Yasunori Ikeda, Shinichi Shimomura, Hiroyuki Ito, Zenji Hiroi, Nikio Takano and Yoshichika Bando: The subsolidus phase diagram of the BiO_1.5-SrO-CuO system at 840°C in air. Solid phases and thier relations in the BiO_1.5-SrO-CuO system were investigated at 840 C in air. Bi_2+xSr_2-xCu_1+vO_z (0.1<x<0.6, 0<y<x/2), Bi₁₇Sr₁₆Cu₇O_z, Bi₂Sr₃Cu₂O_z and BiSr₃O_z, have newly been found. Structural data was obtained by means of powder XRD and TEN. The superconductor with a Tc-10K corresponds to the Bi-poorest end of the solid solution mentioned above.