Hostname: page-component-8448b6f56d-m8qmq Total loading time: 0 Render date: 2024-04-23T12:59:49.496Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of heat treatment on the reflective spectrum of zinc oxide powders

Published online by Cambridge University Press:  31 January 2011

M.M. Mikhailov ,
V.V. Neshchimenko ,
Chundong Li ,
Shiyu He  and
Dezhuang Yang
M.M. Mikhailov
Affiliation:
Tomsk University of Control Systems and Radio-electronics, Tomsk 634050, Russia; and Harbin Institute of Technology, Harbin 150001, China
V.V. Neshchimenko*
Affiliation:
Amur State University, Blagoveshchensk, Amur Region 675027, Russia
Dezhuang Yang
Affiliation:
Harbin Institute of Technology, Harbin 150001, China
*
a)Address all correspondence to this author. e-mail: v1ta1y@mail.ru
Get access

Abstract

To determine the optimum baking temperatures for nanopowder introduction, the variation of reflective spectrum of baked zinc oxide powders, which are used as pigments for thermal control coatings of spacecraft, has been investigated over the wavelength range of 0.225–2.5 μm after being baked at temperatures between 400 °C and 850 °C. It has been established that baking temperatures over 750 °C result in a reduction of spectral reflectance in the visible light spectrum region. This is due to the formation of absorption bands of intrinsic point defects and thus increasing the spectral reflectance in the near-infrared region. The optimum temperature is 650 °C at which the bleaching effect was observed long after heat treatment. Moreover, an increase in the reflection coefficient occurs in the regions of 380–450 nm and 1100–2500 nm in this case.

Keywords

DefectsOptical propertiesZn
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 1 , January 2009 , pp. 19 - 23
Copyright
Copyright © Materials Research Society 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Mikhailov, M.M., Sokolovsky, A.N.: Research on radiation stability of the coatings on the base of titanium dioxide modified with nano-powders of Al2O3 and ZrO2. J. Surf. Invest. 8, 79 2006Google Scholar
2.Mikhailov, M.M., Sokolovsky, A.N.: Kinetics of photo-degradation of titanium dioxide pigment modified with nano-powders of Al2O3 and ZrO2. J. Phys. Chem. Mater. Process. 1, 32 2006Google Scholar
3.Mikhailov, M.M., Verevkin, A.S.: Optical properties and radiation stability of thermal control coatings based on doped zirconium dioxide powders. J. Mater. Res. 19, 535 2004Google Scholar
4.Kotov, A.G., Gromov, V.V.: Radiation Chemistry of Heterogeneous Systems Energoisdat Moscow 1988 232Google Scholar
5.Mikhailov, M.M., Sharafutdinova, V.V.: The accumulation of own point defects in the spacecraft thermal control coatings on the base of ZnO due to electron irradiation. Izvestiya Vuzov. Phys. 4, 79 1998Google Scholar
6.Mikhailov, M.M., Sharafutdinova, V.V.: Changes in optical properties of the spacecraft thermal control coatings under the influence of solar wind. Izvestiya Vuzov. Phys. 6, 83 1998Google Scholar
7.Mikhailov, M.M., Sharafutdinova, V.V.: The accumulation of own point defects in zinc oxide powder and eflecting coatings on the base of zinc oxide under electromagnetic radiation imitating the solar spectrum. Izvestiya Vuzov. Phys. 5, 70 1999Google Scholar
8.Mikhailov, M.M., Dvoretsky, M.I.: The analysis of diffuse reflection and absorption spectra of ZnO in adjacent infra-red spectrum area. Izvestiya Vuzov Phys. 7, 86 1988Google Scholar
9.Kutepova, V.P.: Emissive Recombination of Zinc Oxide. Autoreferat of diss. of cand. techn. nauk. /M. MEI, 1981Google Scholar
10.Mikhailov, M.M.: Variation of activation energy of the surface conductivity of polycrystal zinc oxide under electron irradiation. Izvestiya Vuzov. Phys. 7, 94 1984Google Scholar
11.Muller, G.: Phys. Status Solidi B 76, 525 1976Google Scholar