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Phase Equilibria in the Sm2O3–CaO–NiO and Sm2O3–NiO–CoO Systems

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Abstract

Phase equilibria in the 1/2 Sm2O3–CaO–NiO and 1/2 Sm2O3–NiO–CoO systems are systematically studied at 1100°C in air. The formation of two types of solid solutions Sm2– yCayNiO4 – δ (0.5 ≤ y ≤ 0.55) and SmCo1– xNixO3 – δ (0 < x ≤ 0.15) crystallized in the K2NiF4-type structure and perovskite structure, respectively, is detected. The oxygen content in the samples within the temperature range 25–1100°C in air is determined by means of high temperature thermogravimetry and dichromatometric titration. Isobaric isothermal cross sections of the phase diagrams for the 1/2 Sm2O3–CaO–NiO and 1/2 Sm2O3–NiO–CoO systems at 1100°C and \({{p}_{{{{{\text{O}}}_{{\text{2}}}}}}}\) = 0.21 atm are proposed.

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Authors and Affiliations

  1. Institute of Natural Sciences and Mathematics, Ural Federal University, 620083, Yekaterinburg, Russia

    A. P. Galayda, N. E. Volkova, L. Ya. Gavrilova & V. A. Cherepanov

  2. Institute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, 620990, Yekaterinburg, Russia

    A. P. Galayda

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  1. A. P. Galayda
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  2. N. E. Volkova
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  3. L. Ya. Gavrilova
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  4. V. A. Cherepanov
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Correspondence to N. E. Volkova.

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Galayda, A.P., Volkova, N.E., Gavrilova, L.Y. et al. Phase Equilibria in the Sm2O3–CaO–NiO and Sm2O3–NiO–CoO Systems. Inorg Mater 55, 593–599 (2019). https://doi.org/10.1134/S0020168519060049

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