PHASE-STABILITY, OXYGEN NONSTOICHIOMETRY, AND SUPERCONDUCTIVITY PROPERTIES OF BI2SR2CACU2O8+DELTA AND BI1.8PB0.4SR2CA2CU3O10+DELTA

被引：10

作者：

MOZHAEV, AP

CHERNYAEV, SV

BADUN, YV

KUZNETSOV, MS

机构：

[1] Department of Chemistry, Moscow State University

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1995年 / 119卷 / 01期

关键词：

D O I：

10.1016/0022-4596(95)80017-J

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Phase stability of Bi2Sr2CaCu2O8+delta (2212) and Bi1.8Pb0.4Sr2Ca2 Cu3O10+delta (2223) was studied by means of thermogravimetry, dilatometry, high-temperature resistivity, and the powder X-ray methods in the temperature range 700-1000 degrees and at P-O2 = 1-10(-4.3) atm. The existence of a high-temperature (peritectic melting) boundary of phase stability was found. The temperatures of low-temperature phase decomposition mere determined in air and under an oxygen atmosphere. The change in oxygen content was determined for the 2212 phase in the temperature range 700-860 degrees C and at P-O2 = 0.21-10(-3.7) atm by iodometric analysis of quenched samples. It was found that in the single-phase region, the change in oxygen nonstoichiometry had an insignificant influence on T-c. It was also shown that the slow cooling of samples led to a significant decrease in T-c and transport j(c) due to partial phase decomposition. (C) 1995 Academic Press, Inc.

引用

页码：120 / 124

页数：5

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