Nonstoichiometry and defect structure of the perovskite-type oxides La1−xSrxFeO3−°
| Autor: | Masafumi Yoshihiro, Kazuo Fueki, Shigeru Yamauchi, Junichiro Mizusaki |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
chemistry.chemical_classification
Chemistry Inorganic chemistry Analytical chemistry Oxide Partial pressure Condensed Matter Physics Electronic Optical and Magnetic Materials Inorganic Chemistry chemistry.chemical_compound Electrical resistivity and conductivity Vacancy defect Materials Chemistry Ceramics and Composites Physical and Theoretical Chemistry Inorganic compound Equilibrium constant Perovskite (structure) Solid solution |
| Zdroj: | Journal of Solid State Chemistry. 58:257-266 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/0022-4596(85)90243-9 |
| Popis: | In order to elucidate the defect structure of the perovskite-type oxide solid solution La1−xSrxFeO3−δ (x = 0.0, 0.1, 0.25, 0.4, and 0.6), the nonstoichiometry, δ, was measured as a function of oxygen partial pressure, PO2, at temperatures up to 1200°C by means of the thermogravimetric method. Below 200°C and in an atmosphere of PO2 ≥ 0.13 atm, δ in La1−xSrxFeO3−δ was found to be close to 0. With decreasing log PO2, δ increased and asymptotically reached x2. The log(PO2atm) value corresponding to δ = x2 was about −10 at 1000°C. With further decrease in log PO2, δ slightly increased. For LaFeO3−δ, the observed δ values were as small as |
| Databáze: | OpenAIRE |
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