Study of the phase stability of La0.6Sr0.4MnO3 – δ oxide with mixed oxygen-electron conductivity-Reference-Cited by-同舟云学术

Study of the phase stability of La0.6Sr0.4MnO3 – δ oxide with mixed oxygen-electron conductivity

Published:2024-07-12 Issue:1 Volume:60 Page:15-23
ISSN:0424-8570
Container-title:Электрохимия
language:
Short-container-title:Èlektrohimiâ

Author:

Guskov R. D.¹,Popov M. P.¹,Kovalev I. V.¹,Nemudry A. P.¹

Affiliation:

1. Institute of Solid State Chemistry and Mechanochemistry SB RAS

Abstract

This work is devoted to the study of thermodynamic characteristics and phase stability of oxides with a perovskite structure using both classical and original methods for studying compounds of similar composition. An oxide with mixed oxygen-electron conductivity La0.6Sr0.4MnO3 – δ obtained by solid-phase synthesis was chosen as the object of research. The stoichiometric range of this composition has been established at temperatures of 600 – 900 оC in the region of oxygen partial pressure up to 3*10–4 atm. The chemical potential of oxygen in the gas phase is calculated, as well as the dependences of the partial molar enthalpy and entropy of oxygen in the oxide in the nonstoichiometry range δ=0.01 – 0.012.

Publisher

The Russian Academy of Sciences

Reference37 articles.

1. McCormack, M., Jin, S., Teifel, T. H., Fleminf, R. M., Philips, J. M., and Ramwsh, R., Very large magnetoresistance in perovskite‐like La‐Ca‐Mn‐O thin films, Appl. Phys. Lett., 1994, vol. 64, no. 22, p. 3045.

2. Теплых, А.Е., Пирогов, А.Н., Меньшиков, А.З., Базуев, Г.В. Кристаллическая структура и магнитное состояние перовскитов LaMn1–xVxO3. Физика твердого тела. 2000. Т. 42. № 12. С. 2175. [Teplikh, A.E., Pirogov, A.N., Men’shikov, A.Z., and Bazuev, G. V., Crystal structure and magnetic state of perovskites LaMn1–xVxO3, Phizika tvyordogo tela (in Russian), 2000, vol. 42, p. 2175.]

3. Lein, H.L., et al., Mechanical properties of mixed conducting La0.5Sr0.5Fe1 – xCoxO3 – δ (0≤x≤1) materials, J. Solid State Electrochem., 2006, vol. 10, p. 635.

4. Смоликов, Ю.И., Шепелев, Ю.Ф., Левин, А.А. Особенности строения высокотемпературных сверхпроводников. Журн. неорган. химии. 1989. Т. 34. С. 2451. [Smolikov, Yu. I., Shepelev, Yu. F., and Levin, A.A., Structural features of high-temperature superconductors, Zhurnal neorganicheskoy khimii (in Russian), 1989, vol. 34, p. 2451.]

5. Kharton, V. V., Patrakeev, M. V., Waerenborgh, J.C., Sobyanin, V. A., Veniaminov, S. A., Yaremchenko, A.A., Gaczynski, P., Belyaev, V. D., Semin, G. L., and Frade, J. R., Methane oxidation over perovskite-related ferrites: Effects of oxygen nonstoichiometry, Solid State Sci., 2005, vol. 7, no. 11, p. 1344.