PHASE-COMPOSITION AND COMPATIBILITIES IN THE BI-SR-CA-CU QUATERNARY OXIDE SYSTEM AT 800-DEGREES-C IN AIR

被引：91

作者：

HONG, BG ^{[1
]}

HAHN, J ^{[1
]}

MASON, TO ^{[1
]}

机构：

[1] NORTHWESTERN UNIV,MCCORMICK SCH ENGN & APPL SCI,MAT RES CTR,EVANSTON,IL 60208

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 07期

关键词：

composition; phase diagrams; phases; solid solutions; superconductors;

D O I：

10.1111/j.1151-2916.1990.tb05253.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Subsolidus phase relations in the system (Bi‐Sr‐Ca‐Cu)‐O at 800°C were investigated via powder X‐ray diffraction and electron probe microanalysis of solid‐state reaction products. Two recently reported (Bi‐Sr‐Ca)‐O phases were detected in quaternary assemlages and had the approximate cation stoichiometries of 9115 and 825. The only truly quaternary compound detected is the superconducting phase with the cation stoichiometry 2212. Tie lines, tie triangles, and compatibility tetrahedra involving this phase and the 2201 superconducting phase were determined. Both superconducting compounds exhibit small but detectable Sr‐to‐Ca solubility and are Sr‐deficient with respect to the “ideal” formulas. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：1965 / 1972

页数：8