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

Mesoporous multiphase amorphous–crystalline Bi 2 O 3 nanopowder with the specific surface area of 23 m 2 /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 t...

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Bibliographic Details
Published inTechnical physics letters Vol. 47; no. 11; pp. 823 - 826
Main Authors Sokovnin, S. Yu, Il’ves, V. G.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.11.2021
Springer Nature B.V
Subjects
Annealing
Bismuth oxides
Bismuth trioxide
Classical and Continuum Physics
Droplets
Electron beams
Evaporation
Extrusion
Nanoparticles
Physics
Physics and Astronomy
pulsed electron beam evaporation
nanopowders
bismuth oxide
droplets
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Summary:Mesoporous multiphase amorphous–crystalline Bi 2 O 3 nanopowder with the specific surface area of 23 m 2 /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.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785021080265