Crystal Chemical Characterization of the Mixed Conductor Sr ( Fe , Co ) 1.5 O y Exhibiting Unusually High Oxygen Permeability
- 1 May 1997
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 144 (5) , L120-L122
- https://doi.org/10.1149/1.1837631
Abstract
The crystal chemistry of a recently reported mixed conductor , exhibiting unusually high oxygen permeability, has been characterized by systematically investigating the system. The samples belong to the general stoichiometry and have an orthorhombic, intergrowth structure isotypic with for 0 ⩽ x ⩽ 1.5. While the intergrowth phase and the perovskite phase coexist along with CoO impurity for 1.7 ⩽ x ⩽ 2.1, the perovskite phase is formed along with CoO impurity for x = 2.4. In the single‐phase region with 0 ⩽ x ⩽ 1.5, the oxygen content decreases, and the total conductivity increases with x. The occurrence of unusually high oxide‐ion conductivity is explained on the basis of crystal chemistry.Keywords
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