Phase diagram in the Bi-Pb-Sr-Ca-Cu-O system期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

按检索

Phase diagram in the Bi-Pb-Sr-Ca-Cu-O system

Authors:	A Sebaoun P Satre M Mansori A L'Honore

Institution:	(1) Matériaux à Finalité Spécifique, Laboratoire de Physico-Chimie des Matériaux et du Milieu Marin, E. A. 1356, Université de Toulon-Var, B. P. 132, 83957 La Garde cedex, France;(2) Laboratoire de Physico-Chimie des Matériaux, Université Chouaib Doukkali, B.P. 20, El Jadida, Maroc

Abstract:	TG-DTA and X-ray diffraction measurements at different temperatures and under different oxygen partial pressures were carried out on the species Bi_1.6Pb_0.4Sr₂CuO_6±x, Bi_1.6Pb_0.4Sr₂CaCu₂O_8±y and Bi_1.6Pb_0.4Sr₂Ca₂Cu₃O_10±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 $P_{O_2 }$ /P_Tot1 at 884°C. This new phase presents a buffer effect towards oxygen exchange between superconducting oxides and the gas phase.This work has benefited from partial financial support by the Centre National d'Etudes Spatiales (C.N.E.S.). It is a pleasure to thank Prof. Yasuhiko Syono of Tohoku University - Sendai- Japan for valuable discussions.

Keywords:	Bi-Pb-Sr-Ca-Cu-O system buffer effect phase transformations
本文献已被 SpringerLink 等数据库收录！