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Synthesis of Hexagonal Boron Nitride Coatings Using Concentrated Solutions of Alkali Metal Borates

Abstract

Continuous nanocrystalline coatings of hexagonal boron nitride (h-BN) with a thickness of ~1000‒350 nm are prepared from highly concentrated aqueous solutions of lithium and sodium borates, which display good film-forming properties. The borate solutions were applied on silicon substrates by spin coating followed by drying in air and treatment in ammonia at a temperature of 1300°C. This method is deemed promising for creating protective coatings (e.g., for protecting carbon products from oxidation at elevated temperatures).

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Funding

I.N. Volkov is grateful to the Ministry of Education and Science of Russian Federation for support of the structural investigation part of this work (program K2A-2018-039 for increasing the competitiveness of National University of Science and Technology “MISiS”).

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Correspondence to A. T. Matveev.

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The authors declare that they have no conflict of interest.

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Translated by A. Kukharuk

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Volkov, I.N., Koval’skii, A.M., Ermekova, Z.S. et al. Synthesis of Hexagonal Boron Nitride Coatings Using Concentrated Solutions of Alkali Metal Borates. Tech. Phys. Lett. 47, 122–125 (2021). https://doi.org/10.1134/S1063785021020152

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Keywords:

  • boron nitride
  • borate solutions
  • h-BN coatings.