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- W2041575897 abstract "In this paper, the structural and transport properties of selected La1−xSrxCo0.2Fe0.8O3 (LSCF) perovskites and La0.6Sr0.4Co0.2Fe0.6Ni0.2O3 (LSCFN64262) perovskite are presented. Crystal structure of the samples was characterized by means of X-ray studies with Rietveld method analysis. DC electrical conductivity and thermoelectric power were measured at a wide temperature range (80–1200 K) in air. For La0.2Sr0.8Co0.2Fe0.8O3 (LSCF2828) and La0.4Sr0.6Co0.2Fe0.8O3 (LSCF4628) perovskites a maximum observed on electrical conductivity dependence on temperature exists at about 750 K. It can be associated with an appearance of oxygen vacancies and implies a mixed ionic-electronic transport. A growing amount of oxygen vacancies at higher temperatures causes a decrease in the electrical conductivity due to a recombination mechanism associated with lowering of the average valence of 3d metals. A similar characteristic was found for LSCFN64262 perovskite, which also exhibits a relatively high electrical conductivity." @default.
- W2041575897 created "2016-06-24" @default.
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- W2041575897 date "2007-11-01" @default.
- W2041575897 modified "2023-09-30" @default.
- W2041575897 title "Structural and electrical properties of selected La1−xSrxCo0.2Fe0.8O3 and La0.6Sr0.4Co0.2Fe0.6Ni0.2O3 perovskite type oxides" @default.
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- W2041575897 doi "https://doi.org/10.1016/j.jpowsour.2007.05.052" @default.
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