Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 48: Issue 5
Phase diagram in the Bi-Pb-Sr-Ca-Cu-O system Buffer effect of non-superconducting phases on oxygen exchange of the superconducting ones
Authors: A. Sebaoun 1 , P. Satre 1 , M. Mansori, and A. L'Honore 1
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  • 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
DOI:
https://doi.org/10.1007/bf01979146
Page Count:
971–980
Publication Date:
01 May 1997
Online Publication Date:
01 Aug 2005
Article Category:
Research Article
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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≤ /PTot≤1 at 884°C. This new phase presents a buffer effect towards oxygen exchange between superconducting oxides and the gas phase.

Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943
Keywords:
Bi-Pb-Sr-Ca-Cu-O system; buffer effect; phase transformations

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