Oxygen conductivity in a double-well model for ion jumps in layered perovskite-related oxides

The theoretical analysis of oxygen-ion conductivity in double perovskite type oxides was performed. The model of ion transport was developed by considering two energetically non-equivalent oxygen positions for ion jumps in the crystalline structure. The temperature variations of oxygen ion conductiv...

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Bibliographic Details
Published in:Solid state ionics 2018-10, Vol.323, p.1-4
Main Authors: Politov, B.V., Marshenya, S.N., Suntsov, A.Yu, Leonidov, I.A., Kozhevnikov, V.L.
Format: Article
Language:English
Subjects:
Conductivity
Ion transport
Oxygen
Oxygen ions
Perovskite
Perovskites
Titanium
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Summary:The theoretical analysis of oxygen-ion conductivity in double perovskite type oxides was performed. The model of ion transport was developed by considering two energetically non-equivalent oxygen positions for ion jumps in the crystalline structure. The temperature variations of oxygen ion conductivity were shown to depend on thermodynamic parameters of the intrinsic oxygen disordering process. The model proposed was verified by experimental data for perovskite-like non-stoichiometric PrBaCo2O6–δ, Sr3Fe2O7–δ and its titanium-doped derivative. •Theoretical model for ion jumps in layered perovskite-related oxides is developed.•Two inequivalent oxygen positions are considered in the model.•The model proposed is verified by independent experimental data.
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2018.05.008