M. M. Mikhailov, V. V. Neshchimenko, S. A. Yuriev, A. N. Lapin, V. A. Goronchko, A. N. Dudin, V. Yu. Yurina
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引用次数: 0
Abstract
The effect of modifying ZnO powders with MgO nanoparticles (with a concentration of 0.1–10 wt %) on their diffuse reflectance spectra in the region of 0.2–2.5 μm before and after irradiation with 30 keV electrons was studied. Modification of ZnO powder was carried out by MgO nanopowder with a concentration from 0.1 to 10 wt % using a solid-state method at a heating temperature of 650°C. X-ray diffraction analysis showed that with this modification method there is no formation of additional phases. It was shown that zinc oxide structure symmetry belongs to the P 63mc space group; magnesium oxide, to the Fm–3m space group. The spectral reflectance of such powders in the visible region is over 90%. Under irradiation of original and modified ZnO powders, as well as the MgO nanopowder, by 30 keV electrons, a decrease in their reflectance is recorded in the entire studied region of the spectrum. It was established that modification with MgO nanoparticles at a concentration of 3 wt % leads to an increase in radiation resistance by a factor of 1.32 compared to unmodified samples. This effect is determined by the sink of radiation defects on the large specific surface area of nanoparticles.
期刊介绍：
Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques publishes original articles on the topical problems of solid-state physics, materials science, experimental techniques, condensed media, nanostructures, surfaces of thin films, and phase boundaries: geometric and energetical structures of surfaces, the methods of computer simulations; physical and chemical properties and their changes upon radiation and other treatments; the methods of studies of films and surface layers of crystals (XRD, XPS, synchrotron radiation, neutron and electron diffraction, electron microscopic, scanning tunneling microscopic, atomic force microscopic studies, and other methods that provide data on the surfaces and thin films). Articles related to the methods and technics of structure studies are the focus of the journal. The journal accepts manuscripts of regular articles and reviews in English or Russian language from authors of all countries. All manuscripts are peer-reviewed.
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