Zahid, M. and Arulraj, I. and Tietz, F. and Stover, D. (2007) Chemical and physical properties of complex perovskites in the La0.8Sr0.2MnO3deLa0.8Sr0.2CuO2.4þdeLa0.8Sr0.2FeO3d system. Solid State Sciences, 9. pp. 706-712.

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Abstract

Perovskites resulting from discrete changes in composition within the quasi-ternary system La0.8Sr0.2MnO3deLa0.8Sr0.2CuO2.4þde La0.8Sr0.2FeO3d were investigated under constant experimental conditions with the objective of obtaining an overview of the variation of the properties relevant for possible future applications. Nineteen nominal perovskite compositions within this system were systematically selected and synthesized under identical conditions by the Pechini method. The experimental data obtained on quantitative chemical analysis, powder X-ray diffraction, electrical conductivity and thermal expansion are presented collectively for the first time to facilitate comparisons. The formation and distribution of the different crystallographic phases at 950 C within this quasi-ternary system are shown. The DC electrical conductivity is strongly influenced by the Cu content and increases up to 276 S cm-1 for La0.8Sr0.2CuO2.4þd. The thermal expansion is dominated by the Cu/Mn ratio and is almost independent of the Fe content.

Item Type:	Article
Uncontrolled Keywords:	Perovskites; SOFC; Electrical conductivity; Thermal expansion
Subjects:	Fuel Cells
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	26 Mar 2012 17:44
Last Modified:	26 Mar 2012 17:44
URI:	http://cecri.csircentral.net/id/eprint/832

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