Abstract
Methods of X-ray diffraction analysis, impedance spectroscopy, and scanning electron microscopy were used to examine how thermal treatment modes affect the transport properties and microstructure of a lithium-conducting oxide ceramic of composition Li0.33La0.56TiO3, produced from powders synthesized by the sol-gel method. It was found that the cubic structure of Li0.33La0.56TiO3 can be stabilized as a result of quenching after the high-temperature of sintering at 1150°C. The conditions were determined in which Li0.33La0.56TiO3 ceramic samples can be obtained with bulk ion conductivity of ∼1 × 10−3 S cm−1 at 20°C, which corresponds to the maximum values for the ceramic based on lithium-lanthanum titanate.
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Acknowledgments
The electron-microscopic measurements were made with the equipment of the Collective Use Center at the Institute of Chemistry and Technology of Rare Elements and Mineral Resources, Kola Scientific Center, Russian Academy of Sciences.
Funding
The study was in part financially supported by Program no. 55 of the Presidium of the Russian Academy of Sciences “Arctic: scientific foundations of its exploration, preservation, and development.”
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Russian Text © The Author(s), 2019, published in Zhurnal Prikladnoi Khimii, 2019, Vol. 92, No. 10, pp. 1254–1262.
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Kunshina, G.B., Shcherbina, O.B. & Ivanenko, V.I. Study of Transport Properties and Microstructure of Lithium-Conducting Li0.33La0.56TiO3 Ceramic. Russ J Appl Chem 92, 1351–1358 (2019). https://doi.org/10.1134/S1070427219100045
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DOI: https://doi.org/10.1134/S1070427219100045