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Formation of Droplets during Annealing of Bi2O3 Nanopowder Obtained by Pulsed Electron Beam Evaporation in Vacuum

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Abstract

Mesoporous multiphase amorphous–crystalline Bi2O3 nanopowder with the specific surface area of 23 m2/g is obtained using pulsed electron beam evaporation in vacuum. The influence of thermal annealing (200–300°C) of the powder in air has been investigated. Droplets 2–5 nm in size are formed on the surface of all large nanoparticles comprising the framework of 3D agglomerates of the nanopowder due to extrusion of liquid bismuth from bulk upon cooling.

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ACKNOWLEDGMENTS

We are grateful to V.S. Gaviko (M.N. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences) for recording thermograms and to A.M. Murzakaev and T.M. Demina (Institute of Electrophysics, Ural Branch, Russian Academy of Sciences) for microscopic and texture investigations.

Funding

This study was supported in part by the Russian Foundation for Basic Research and Czech Science Foundation within the framework of research project no. 20-58-26002.

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Authors and Affiliations

  1. Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, 620016, Yekaterinburg, Russia

    S. Yu. Sokovnin & V. G. Il’ves

  2. Ural Federal University Named after the First President of Russia B.N. Yeltsin, 620002, Yekaterinburg, Russia

    S. Yu. Sokovnin

Authors
  1. S. Yu. Sokovnin
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  2. V. G. Il’ves
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Correspondence to S. Yu. Sokovnin.

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The authors declare that they have no conflicts of interest.

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Translated by A. Sin’kov

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Sokovnin, S.Y., Il’ves, V.G. Formation of Droplets during Annealing of Bi2O3 Nanopowder Obtained by Pulsed Electron Beam Evaporation in Vacuum. Tech. Phys. Lett. 47, 823–826 (2021). https://doi.org/10.1134/S1063785021080265

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  • DOI: https://doi.org/10.1134/S1063785021080265

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