Temperature Dependence of the Mie Scattering and Absorption Cross Sections for Aluminum Oxide

Abstract

The temperature dependence of the scattering and absorption cross sections for electromagnetic radiation incident upon spherical particles of aluminum oxide is calculated from the Mie theory for a temperature range from 1200°C to 2020°C.The calculations are based on the recent measurements of the absorption coefficient by Gryvnak and Burch. The results are given for particle radii from 0.1 μ to 10 μ and a range of wavelengths from 0.5 μ to 6 μ. At a wavelength of 2 μ the efficiency factor for absorption increases by a factor of 40 as the temperature increases from 1200°C to 2020°C.