Abstract
By the method of joint crystallization of solutions of nitrate salts, the highly dispersed powders of the composition (CeO2)0.98(Sm2O3)0.02, (CeO2)0.95(Sm2O3)0.05, and (CeO2)0.90(Sm2O3)0.10 are synthesized, and on their basis, nanoceramic materials with a crystalline cubic structure of fluorite type are obtained, with the grain size of the crystallites of ~68–81 nm (1300°С). Their mechanical and electrophysical properties are studied; it is found that they have an open porosity of 2–6% and predominantly ionic (ti = 0.82–0.71 in the range of 300–700°C) type of electrical conductivity due to the formation of mobile oxygen vacancies during the heterovalent replacement of Се4+ with Sm3+, σ700°C =1.3 × 10–2 S/cm. The studies show the prospects of using the obtained ceramic materials as solid oxide electrolytes of intermediate-temperature fuel cells.
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This work was carried out as part of the State Assignment of the Institute of Silicate Chemistry of the Russian Academy of Sciences (state registration number AAAA-A19-119022290091-8).
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Kalinina, M.V., Duskina, D.A., Kovalko, N.Y. et al. Liquid-Phase Synthesis and Physical and Chemical Properties of Ceramic Electrolyte Nanomaterials in the CeO2–Sm2O3 System for Solid Oxide Fuel Cells. Inorg. Mater. Appl. Res. 11, 1229–1235 (2020). https://doi.org/10.1134/S2075113320050147
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DOI: https://doi.org/10.1134/S2075113320050147