Theoretical-Experimental Determination of the Temperature Dependence of the Integral Emissivity of an Alumina Ceramic

Optical parameters (the absorption index and scattering index) of an alumina ceramic are determined in the wavelength range 1 – 20 μm based on measurements of the total reflection coefficients of layers of different thicknesses. The measurement data is used to determine the spectral emissivity of ar...

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Bibliographic Details
Published in:Refractories and industrial ceramics 2015-01, Vol.55 (5), p.424-427
Main Authors: Mironov, R. A., Zabezhailov, M. O., Borodai, S. P.
Format: Article
Language:English
Subjects:
Aluminum oxide
Ceramic materials
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Glass
Materials Science
Natural Materials
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Summary:Optical parameters (the absorption index and scattering index) of an alumina ceramic are determined in the wavelength range 1 – 20 μm based on measurements of the total reflection coefficients of layers of different thicknesses. The measurement data is used to determine the spectral emissivity of arbitrarily thick layers of the material. Literature data on the temperature dependence of the absorption index of sapphire is used to model the temperature dependence of the spectral and integral emissivities of the alumina ceramic. The information obtained from the study can be used in thermophysical calculations.
ISSN:1083-4877
1573-9139
DOI:10.1007/s11148-015-9738-z