On the Radiation Stability of ZnO Powders Modified with Own Nanoparticles

M. M. Mikhailov; Михайлов М. М.; S. A. Yuryev; Юрьев С. А.; A. N. Lapin; Лапин А. Н.; V. A. Goronchko; Горончко В. А.

doi:10.31857/S1028096023090078

On the Radiation Stability of ZnO Powders Modified with Own Nanoparticles

Autores: Mikhailov M.¹, Yuryev S.¹, Lapin A.¹, Goronchko V.¹
Afiliações:
1. Tomsk State University of Control Systems and Radioelectronics
Edição: Nº 9 (2023)
Páginas: 52-57
Seção: Articles
URL: https://journals.rcsi.science/1028-0960/article/view/137812
DOI: https://doi.org/10.31857/S1028096023090078
EDN: https://elibrary.ru/ZMCKHS
ID: 137812

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Resumo

Changes in the diffuse reflectance spectra (∆ρ_λ) and integral absorption coefficient (Δа_s) in the range of 0.2–2.5 µm were studied after modification of zinc oxide powders with few µm particles (mZnO) via own nZnO nanoparticles of various concentrations in the range of 0.1–10.0 wt %. A decrease in the reflection coefficient (ρ) in the range of 0.4–1.0 µm and its increase in the range of 1.0–2.5 µm in the modified mZnO/nZnO powders was established. Electron irradiation (Е = 30 keV, F = 2 × 10¹⁶ cm^–2) of mZnO, nZnO, and mZnO/nZnO powders with different concentrations of nanoparticles showed that the optimal concentration of nanoparticles is 5 wt %. The radiation stability of the modified powder at this concentration increased by a factor of 2.95, the radiation stability of a nanopowder is more than 2 times higher than that of a powder with particles a few microns in size. When irradiated with electrons all three types of powders form their own point defects, which absorb in the visible region, and free electrons, which absorb in the near-IR region.

Palavras-chave

zinc oxide, powders, nanoparticles, modification, optical properties, absorption spectrum, reflection spectrum.

Bibliografia

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