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Search for Flux Media for Crystallization of Epitaxial Fluorite Layers

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Abstract

The solubility of CaF2 in different chloride and chloride‒fluoride melts has been studied in order to choose appropriate fluxes for crystallization of epitaxial fluorite layers. It is shown that the advantages of the 0.6NaCl–0.4NaF composition over the well-known CaCl2–CaF2 flux are the high thermal stability, lower (by half) temperature gradient of solubility, and possibility for reducing the growth temperature by 100°С. Seed crystallization of fluorite in the CaF2–(0.6NaCl–0.4NaF) flux has been performed both using the temperature reduction method and under the temperature gradient conditions.

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ACKNOWLEDGMENTS

We are grateful to E.A. Garibin for supplying the CaF2 : Er3+ ceramic sample, V.V. Voronov for performing the X-ray diffraction analysis, A.E. Baranchikov for carrying out the scanning electron microscopy study, and V.N. Kuzin for the help in fabricating a guillotine.

Funding

This study was supported by the Russian Foundation for Basic Research, project no. 2018-18-29-12050-MK.

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Authors and Affiliations

  1. Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991, Moscow, Russia

    V. A. Maslov, E. V. Chernova & P. P. Fedorov

Authors
  1. V. A. Maslov
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  2. E. V. Chernova
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  3. P. P. Fedorov
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Correspondence to P. P. Fedorov.

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Translated by E. Bondareva

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Maslov, V.A., Chernova, E.V. & Fedorov, P.P. Search for Flux Media for Crystallization of Epitaxial Fluorite Layers. Crystallogr. Rep. 65, 647–652 (2020). https://doi.org/10.1134/S106377452004015X

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  • DOI: https://doi.org/10.1134/S106377452004015X

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