Investigation of high-temperature oxygen release from LA2NiO4+δ oxide in quasi-equilibrium mode
- Authors: Tropin E.S.1, Popov M.P.1, Guskov R.D.1, Nemudry A.P.1
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Affiliations:
- Institute of Solid State Chemistry and Mechanochemistry of Siberian Branch of Russian Academy of Sciences
- Issue: Vol 60, No 3 (2024)
- Pages: 235-241
- Section: Articles
- URL: https://medjrf.com/0424-8570/article/view/671569
- DOI: https://doi.org/10.31857/S0424857024030081
- EDN: https://elibrary.ru/RBHDMK
- ID: 671569
Cite item
Abstract
A continuous phase diagram δ (pO2, T) of a nonstoichiometric oxide La2NiO4+δ with a layered perovskite-related Ruddlesden-Popper structure was obtained by the method of quasi-equilibrium oxygen release. The thermodynamic parameters are determined as functions of oxide nonstoichiometry δ. The calculation was carried out within the framework of the models of a localized electron and a free electron, which are used to describe the defect structure of ferrites and cobaltites, respectively. It is shown that the features of the phase diagram can be related to the density of electronic states near the Fermi level of electrons.
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About the authors
E. S. Tropin
Institute of Solid State Chemistry and Mechanochemistry of Siberian Branch of Russian Academy of Sciences
Author for correspondence.
Email: evg2306@mail.ru
Russian Federation, Novosibirsk
M. P. Popov
Institute of Solid State Chemistry and Mechanochemistry of Siberian Branch of Russian Academy of Sciences
Email: popov@solid.nsc.ru
Russian Federation, Novosibirsk
R. D. Guskov
Institute of Solid State Chemistry and Mechanochemistry of Siberian Branch of Russian Academy of Sciences
Email: evg2306@mail.ru
Russian Federation, Novosibirsk
A. P. Nemudry
Institute of Solid State Chemistry and Mechanochemistry of Siberian Branch of Russian Academy of Sciences
Email: evg2306@mail.ru
Russian Federation, Novosibirsk
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Note
Публикуется по материалам IX Всероссийской конференции с международным участием “Топливные элементы и энергоустановки на их основе”, Черноголовка, 2022.