Oxidation-reduction Behavior Of Undoped And Sr-doped LaMnO3 Nonstoichiometry And Defect Structure

Author

J. H. Kuo
Harlan U. Anderson, Missouri University of Science and TechnologyFollow
Don M. Sparlin, Missouri University of Science and TechnologyFollow

Abstract

Undoped and Sr-doped LaMnO₃ showed reversible oxidation-reduction behavior. These perovskites can be excess, stoichiometric or deficient in oxygen content depending on the specific conditions. Under very reducing conditions decomposition into new phases occurs. Phase stabilities for these oxides were determined. The results showed that Sr doping caused the LaMnO₃ to dissociate at higher oxygen activities than those necessary for undoped LaMnO₃. Defect models are proposed to interpret the thermogravimetric results in which metal vacancies are assumed for the oxygen excess condition and oxygen vacancies are assumed for the oxygen deficient condition. Thermodynamic properties were calculated which support the model. © 1989.

Recommended Citation

J. H. Kuo et al., "Oxidation-reduction Behavior Of Undoped And Sr-doped LaMnO3 Nonstoichiometry And Defect Structure," Journal of Solid State Chemistry, vol. 83, no. 1, pp. 52 - 60, Elsevier, Jan 1989.

The definitive version is available at https://doi.org/10.1016/0022-4596(89)90053-4

Department(s)

Materials Science and Engineering

Second Department

Physics

International Standard Serial Number (ISSN)

1095-726X; 0022-4596

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 Elsevier, All rights reserved.

Publication Date

01 Jan 1989