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Synthesis and Electrical Conductivity of Nanocrystalline Scandium Fluoride

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Inorganic Materials Aims and scope

Abstract—

Phase-pure ScF3 nanocrystals (ReO3 structure, sp. gr. \(Pm\bar {3}m\)) with an average grain size of ~20 nm and unit-cell parameter a = 4.0054 ± 0.0002 Å were prepared by a mild chemical method (precipitation from aqueous ScCl3 by HF). The nanopowders were cold-pressed into ceramic compacts and their ionic conductivity was measured and determined to be 1.0 × 10–5 S/cm at 673 K. The activation energy for ion transport in the ceramics is 1.09 ± 0.05 eV. The electrical conductivity of nanocrystalline ScF3 exceeds that of microcrystalline and single-crystal scandium fluoride by 25 and 250 times, respectively.

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ACKNOWLEDGMENTS

In this study, we used equipment at the Shared Research Facilities Center, Federal Scientific Research Center “Crystallography and Photonics,” Russian Academy of Sciences.

Funding

This work was supported by the Russian Federation Ministry of Science and Higher Education as part of the state research target for the Crystallography and Photonics Federal Scientific Research Center “Crystallography and Photonics,” Russian Academy of Sciences.

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  1. Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences, 119333, Moscow, Russia

    N. I. Sorokin & I. I. Buchinskaya

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Correspondence to N. I. Sorokin.

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Sorokin, N.I., Buchinskaya, I.I. Synthesis and Electrical Conductivity of Nanocrystalline Scandium Fluoride. Inorg Mater 59, 858–865 (2023). https://doi.org/10.1134/S0020168523080150

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