Phase diagram in the Bi-Pb-Sr-Ca-Cu-O system - Buffer effect of non-superconducting phases on oxygen exchange of the superconducting ones

被引：7

作者：

Sebaoun, A ^{[1
]}

Satre, P ^{[1
]}

Mansori, M ^{[1
]}

LHonore, A ^{[1
]}

机构：

[1] UNIV CHOUAIB DOUKKALI,LAB PHYSICOCHIM MAT,JADIDA,MOROCCO

来源：

JOURNAL OF THERMAL ANALYSIS | 1997年 / 48卷 / 05期

关键词：

Bi-Pb-Sr-Ca-Cu-O system; buffer effect; phase transformations;

D O I：

10.1007/BF01979146

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

TG-DTA and X-ray diffraction measurements at different temperatures and under different oxygen partial pressures were carried out on the species Bi1.6Pb0.4Sr2CuO6+/-x, Bi1.6Pb0.4Sr2CaCu2O8+/-y and Bi1.6Pb0.4Sr2Ca2Cu3O10+/-z to analyse the influence of the oxygen chemical potential on the phase transformations. A new phase was found at isobaric invariant equilibrium for 0.5 less than or equal to P-O2/P(Tot)less than or equal to 1 at 884 degrees C. This new phase presents a buffer effect towards oxygen exchange between superconducting oxides and the gas phase.

引用

页码：971 / 980

页数：10

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