Thermochemical Stability, Electrical Conductivity, and Seebeck Coefficient of Sr-Doped LaCo0.2Fe0.8O3-Δ
Abstract
Phase stability, oxygen content, electrical conductivity, and Seebeck coefficient of La1-xSrxCo0.2Fe0.8O3-δ (x = 0, 0.2, 0.4) were studied as a function of temperature and oxygen activity. The thermochemical properties of these compositions under a reducing atmosphere appear to follow the boundaries set between the two end members, LaFeO3 and LaCoO3, but the electrical properties are closer to those of LaFeO3. The Sr content (x ≤ 0.4) does not seem to have a significant effect on the high-temperature phase stability. Dissociation of these compositions under a reducing atmosphere occurred gradually by the formation of transient compounds. The major transient compounds formed during dissociation could be represented by a general formula of (La, Sr) (Fe, Co)O4. Upon further reduction, these oxides dissociated to La2O3, SrO, Co, and Fe. © 1995 Academic Press. All rights reserved.
Recommended Citation
L. W. Tai et al., "Thermochemical Stability, Electrical Conductivity, and Seebeck Coefficient of Sr-Doped LaCo0.2Fe0.8O3-Δ," Journal of Solid State Chemistry, vol. 118, no. 1, pp. 117 - 124, Elsevier, Jan 1995.
The definitive version is available at https://doi.org/10.1006/jssc.1995.1319
Department(s)
Materials Science and Engineering
International Standard Serial Number (ISSN)
1095-726X; 0022-4596
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Elsevier, All rights reserved.
Publication Date
01 Jan 1995