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


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Resumo

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.

Sobre autores

A. Galayda

Institute of Natural Sciences and Mathematics, Ural Federal University; Institute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences

Email: nadezhda.volkova@urfu.ru
Rússia, Yekaterinburg, 620083; Yekaterinburg, 620990

N. Volkova

Institute of Natural Sciences and Mathematics, Ural Federal University

Autor responsável pela correspondência
Email: nadezhda.volkova@urfu.ru
Rússia, Yekaterinburg, 620083

L. Gavrilova

Institute of Natural Sciences and Mathematics, Ural Federal University

Email: nadezhda.volkova@urfu.ru
Rússia, Yekaterinburg, 620083

V. Cherepanov

Institute of Natural Sciences and Mathematics, Ural Federal University

Email: nadezhda.volkova@urfu.ru
Rússia, Yekaterinburg, 620083

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