Abstract: The structural and phase transformations of La0.6Ca0.4Mn1-yCoyO3±δ (y = 0.2 – 0.6) solid solutions in a reducing atmosphere were studied using in situ XRD and HRTEM methods. Experiments have shown that heat treatment in a reducing atmosphere of H2 leads to the partial decomposition of solid solutions, the nature of which differs from decomposition in an inert atmosphere. In the case of a system with a hydrogen-containing atmosphere, the heterogeneous reduction of the structure leads to the formation of an orthorhombic phase of LaMnO3-based perovskite with disordered vacancies, an additional phase of ordered Rudlesden–Poppertype perovskite based on La2CoO4 and Co and Ca2MnO4 nanoparticles on the surface of perovskite. In an environment with excessive partial oxygen pressure for the reduced sample, the reverse phase transition of the Rudlesden–Popper phase into the perovskite phase occurs.

Cite: Kapishnikov A.V. , Gerasimov E.Y.
Phase Transformations in Perovskites La0.6Ca0.4Mn1-yCoyO3±δ under the Action of Hydrogen
Наносистемы: физика, химия, математика = Nanosystems: physics, chemistry, mathematics. 2025. V.16. N1. P.51-57. DOI: 10.17586/2220-8054-2025-16-1-51-57 WOS Scopus

Dates:

Submitted:	Nov 19, 2024
Accepted:	Dec 12, 2024

Identifiers:

Web of science:	WOS:001439724200004
Scopus:	2-s2.0-105000062962

Citing: Пока нет цитирований

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