Abstract—
We have synthesized and investigated sodium sulfate-based materials with Na+ ion conductivity: Na2SO4, Na2SO4:3.5% Yb, and Na3Ga(SO4)3. The addition of Yb3+ heterovalent cations leads to a considerable increase in the electrical conductivity of Na2SO4 (by ~240 times at 573 K) as a result of sodium vacancy formation and stabilization of the high-temperature (hexagonal) phase (sp. gr. P63/mmc). The sodium vacancy concentration and mobility in the (Na0.895Yb0.035)2SO4 solid solution are nvac = 7.93 × 1020 cm−3 and μvac = 2.7 × 10−5 cm2/(V s) (573 K), respectively.
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ACKNOWLEDGMENTS
In this study, we used equipment at the Shared Research Facilities Center, Prokhorov General Physics Institute of the Russian Academy of Sciences, and the Shared Research Facilities Center, Shubnikov Institute of Crystallography, Crystallography and Photonics Federal Research Center, Russian Academy of Sciences.
Funding
This work was supported by the Prokhorov General Physics Institute of the Russian Academy of Sciences, and the Shubnikov Institute of Crystallography, Crystallography and Photonics Federal Research Center, Russian Academy of Sciences.
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Sorokin, N.I., Proydakova, V.Y., Voronov, V.V. et al. Electrical Conductivity of Sodium Sulfate-Based Phases. Inorg Mater 58, 806–813 (2022). https://doi.org/10.1134/S0020168522080118
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DOI: https://doi.org/10.1134/S0020168522080118