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Modification of the Cationic Composition of LiNbO3 and LiTaO3 Nanopowders in Calcium-Containing Chloride Melts

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Abstract

The ionic compositions of lithium metaniobate and metatantalate nanopowders are modified in calcium-containing chloride melts. The reaction products are studied by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and elemental chemical analysis. The results of the studies show that the surface layer of the modified small-size particles of the lithium niobate or lithium tantalate powders is enriched in calcium metaniobate or metatantalate (CaNb2O6 or CaTa2O6) formed due to the isomorphic heterovalent substitution of calcium ions for lithium ions in molten LiCl–CaCl2 and KCl–CaCl2 mixtures at 700 and 750°C.

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ACKNOWLEDGMENTS

The authors are grateful to A.A. Pankratov and N.I. Moskalenko (Center for Collective Use “Composition of Matter” at the Institute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences) for the analysis of the composition and morphology of the modified oxide products.

Funding

This work was supported in part by the Russian Foundation for Basic Research, project no. 18-03-00475a.

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Authors and Affiliations

  1. Institute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia

    V. A. Khokhlov, N. A. V’yugin, V. N. Dokutovich, I. D. Zakir’yanova & B. D. Antonov

  2. Ural Federal University, Yekaterinburg, Russia

    V. A. Khokhlov & I. D. Zakir’yanova

Authors
  1. V. A. Khokhlov
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  2. N. A. V’yugin
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  3. V. N. Dokutovich
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  4. I. D. Zakir’yanova
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  5. B. D. Antonov
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Corresponding author

Correspondence to V. A. Khokhlov.

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Translated by E. Yablonskaya

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Khokhlov, V.A., V’yugin, N.A., Dokutovich, V.N. et al. Modification of the Cationic Composition of LiNbO3 and LiTaO3 Nanopowders in Calcium-Containing Chloride Melts. Russ. Metall. 2020, 144–149 (2020). https://doi.org/10.1134/S0036029520020081

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