排序方式: 共有17条查询结果,搜索用时 15 毫秒
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M. M. MikhaiIov V. V. Neshchimenko 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2009,3(6):950-955
A comparative analysis of the structure, phase composition, morphology, and diffuse reflection spectra of zirconium dioxide
micro- and nanopowders in the 0.2–2.5 μm range and the changes after irradiation with 100 keV electrons and protons is carried
out. The reflective capability of nanopowders is found to be lower, though the radiation stability higher, as compared to
micropowders. 相似文献
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Yurina V. Yu. Neshchimenko V. V. Chundong Li 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2020,14(2):253-259
Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques - A comparative analysis of the diffuse reflectance spectra in the range from 200 to 2500 nm is carried out on... 相似文献
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In the present article we give the results of measurements of the density jump in a shock wave propagating in water containing air or helium bubbles. We show that the thermal relaxation at the shock front depends on the properties of the gaseous component and the wave intensity. Breakup of the bubbles promotes more rapid temperature equalization between the components of the mixture.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 4, pp. 146–149, July–August, 1976.The authors are grateful to L. P. Gorbachev for valuable comments. 相似文献
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M. M. Mikhailov V. V. Neshchimenko N. V. Dedov Chundong Li Shiyu He 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2011,5(6):1152-1161
The effect of the modification of ZnO powders by ZrO2 and Al2O3 nanoparticles with a concentration of 1–30 wt % is investigated by diffuse reflectance spectra within the wavelength range
0.2 to 2.5 μm before and after 100 keV proton and electron irradiation. It has been established that the introduction of nanoparticles
enhances the optical stability of the pigments under proton irradiation, but reduces it under electron irradiation. Samples
modified by 5 wt % of ZrO2 nanoparticles have the highest stability of optical properties after proton exposure. The degradation of optical properties
under electron irradiation is not high for this concentration of nanoparticles. A decrease in the absorption of pigments modified
with nanoparticles after proton exposure is determined by a decrease in the intensity of bands located in the UV and visible
regions. After electron exposure the absorption bands have a high intensity in the whole spectrum range. 相似文献
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M. M. Mikhailov V. V. Neshchimenko Chundong Li Bang-Jiao Ye 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2012,6(1):6-11
The modifying effect of Al2O3, Al2O3 · CeO2, ZrO2, ZrO2 · Y2O3 nanopowders on the photoluminescence spectra of ZnO powder in the 360–660 nm range is investigated. It is found that the
introduction of nanoparticles causes a decrease in the ultraviolet band intensity and an increase in the visual spectral band
intensity. The change in the intensity of elementary components of the visible range band during modification seems to be
explained by the emergence of oxygen and zinc vacancies (V
O+ and V
Zn−) and interstitial oxygen ions (O
i
−). 相似文献
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M. M. Mikhailov V. V. Neshchimenko Lee Chundong T. A. Utebekov 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2017,11(4):827-831
A comparative analysis of the structure, phase composition, morphology, and diffuse reflection spectra in the region of 0.2–2.5 μm is carried out. Their changes arising from the bombardment of microand nanopowders of yttrium oxide with 100-keV protons and 100-keV electrons is examined. It is found that the reflectance of the nanopowders in the near-IR (infrared) region is less than that of the micropowders and, upon electron bombardment, their radiation resistance is slightly larger as compared to the micropowders. 相似文献
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M. M. Mikhailov V. V. Neshchimenko Chundong Li Bang-Jiao Ye 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2013,7(6):1086-1091
The photoluminescence spectra of initial ZnO powder and that modified by Al2O3, Al2O3 · CeO2 nanopowders are investigated in the range 360–660 nm before and after 100-keV proton irradiation. It is found that the introduction of nanoparticles causes a decrease in the UV-band intensity and a change in the luminescence bands in the visual spectrum due to V O + oxygen vacancies, O int - interstitial oxygen, and V Zn - zinc vacancies. Luminescence quenching in the UV and visible spectra occurs under the effect of protons. The decomposition of the spectra into elementary defects and analysis of changes in their integrated intensity during modification and irradiation of the powders are carried out. 相似文献