NEW ANIONIC CONDUCTIVE VITREOUS PHASE BASED ON BISMUTH, LEAD, CADMIUM, OXYGEN AND FLUORINE: ELECTRICAL PROPERTIES AND STRUCTURAL STUDY OF THE RECRYSTALLISED PHASE

Solid electrolytes in the Bi2O3-CdO-PbF2 system are attractive materials for developing new devices such as SOFCs, gas sensors or solid state batteries. Investigations in the Bi2O3-CdO-PbF2 system using silica tubes as synthesis containers indicate the existence of a large vitreous domain. Structura...

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Bibliographic Details
Published in:Journal of materials chemistry 2000-01, Vol.10 (7), p.1673-1677
Main Authors: Desanglois, F, Follet-Houttemane, C, Boivin, J-C
Format: Article
Language:English
Online Access:Get full text
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Summary:Solid electrolytes in the Bi2O3-CdO-PbF2 system are attractive materials for developing new devices such as SOFCs, gas sensors or solid state batteries. Investigations in the Bi2O3-CdO-PbF2 system using silica tubes as synthesis containers indicate the existence of a large vitreous domain. Structural determination, using powder diffraction and Rietveld methods, showed that the recrystallised phase is isotypic to the trigonal phase belonging to the Bi2O3-PbO-PbF2 system. Raman studies revealed boson and large peaks, typical of a vitreous phase containing lead in its formulation. Conductivity measurements display sigma values close to 10 exp(-3) S/cm at 250 C with an activation energy of 0.6 eV. These values are among the best obtained for an anionic conductive glass. 13 refs.
ISSN:0959-9428