Synthesis and oxygen permeability of the perovskite-type oxides in the La–Sr–Fe–Mn–O system

The perovskite-type oxides, La1−xSrxFe0.5Mn0.5O3−d and Sr1−wFeyMn1−yO3−x, were synthesized and investigated regarding their electrical conductivity and oxygen permeability. La1−xSrxFe0.5Mn0.5O3−d for x=0–0.5 exhibited semiconducting behavior below 400 °C and all the compounds exhibited metallic beha...

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Bibliographic Details
Published in:Solid state ionics 2005-05, Vol.176 (15-16), p.1377-1381
Main Authors: Kato, Sumio, Kikawa, Daisuke, Ogasawara, Masataka, Moriya, Yoshio, Sugai, Mikio, Nakata, Shinichi
Format: Article
Language:English
Subjects:
Electrical conductivity
Ion vacancy
Oxygen permeation
Perovskite
Synthesis
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Summary:The perovskite-type oxides, La1−xSrxFe0.5Mn0.5O3−d and Sr1−wFeyMn1−yO3−x, were synthesized and investigated regarding their electrical conductivity and oxygen permeability. La1−xSrxFe0.5Mn0.5O3−d for x=0–0.5 exhibited semiconducting behavior below 400 °C and all the compounds exhibited metallic behavior above 500 °C, indicating electronic conduction. Increase of Sr content for La1−xSrxFe0.5Mn0.5O3−d and Fe3+/Mn4+ ratio for SrFeyMn1−yO3−d led to increase in oxygen vacancies in the perovskite lattice and enhanced oxygen permeability. Introduction of cation vacancies also enhanced the permeability of Sr1−wFe0.8Mn0.2O3−d and Sr0.8Fe0.8Mn0.2O3−d had the highest oxygen permeation rate of the compounds synthesized in this work.
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2005.03.006