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Synthesis of Calcium Fluoride Nanoparticles in a Microreactor with Intensely Swirling Flows

  • INORGANIC MATERIALS AND NANOMATERIALS
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Abstract

Calcium fluoride powders were prepared by reacting solutions of calcium nitrate (\({{c}_{{{\text{Ca}}{{{({\text{N}}{{{\text{O}}}_{{\text{3}}}})}}_{{\text{2}}}}}}}\) = 0.3846 mol/L) and potassium fluoride (cKF = 0.7692 mol/L) in a microreactor with intensely swirling flows at a reagent flow rate of 2.1–3.2 L/min. Colloidal solutions were thus prepared, whose settling yielded CaF2 powders with a mean size of coherent scattering domains of about 40 nm. The particles had no crystallographic faceting. An increase in reagent flow rate prevented the formation of agglomerates and improved the grain-size uniformity of the powder.

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ACKNOWLEDGMENTS

The facilities of the Shared Facilities Center of the Prokhorov General Physics Institute of the Russian Academy of Sciences and the Shared Facilities Center of the Kurnakov Institute of the Russian Academy of Sciences were used.

Funding

The work was in part supported by the Ministry of Science and Higher Education of the Russian Federation (project no. 0097-2019-0017) and in part supported by the Russian Foundation for Basic Research (project no. 18-29-12050-MK).

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Authors and Affiliations

  1. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, 199034, St. Petersburg, Russia

    R. Sh. Abiev, A. V. Zdravkov & Yu. S. Kudryashova

  2. St. Petersburg State Institute of Technology, 190013, St. Petersburg, Russia

    R. Sh. Abiev

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

    A. A. Alexandrov, S. V. Kuznetsov & P. P. Fedorov

  4. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia

    A. A. Alexandrov

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  1. R. Sh. Abiev
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Correspondence to P. P. Fedorov.

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Translated by O. Fedorova

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Abiev, R.S., Zdravkov, A.V., Kudryashova, Y.S. et al. Synthesis of Calcium Fluoride Nanoparticles in a Microreactor with Intensely Swirling Flows. Russ. J. Inorg. Chem. 66, 1047–1052 (2021). https://doi.org/10.1134/S0036023621070020

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