Article - Open Access
Journal of Applied Physics
American Institute of Physics
The effects of ionizing and displacive radiation on the thermal conductivity of alumina at high temperatures have been studied. The phonon scattering relaxation times for several scattering mechanisms have been used to determine the effect on the thermal conductivity. The scattering mechanisms considered are scattering by electrons excited into the conduction band, vacancies, aluminum precipitates, and voids. It is found that under irradiation conditions where the electrical conductivity and dielectric loss tangent are greatly increased there is not a significant decrease in the thermal conductivity due to phonon-electron scattering. The conditions under which the scattering due to vacancies, aluminum precipitates, and voids each produces a significant reduction in the thermal conductivity are discussed.
White, D. P.
(1993). The Effect of Ionizing and Displacive Radiation on the Thermal Conductivity of Alumina. Journal of Applied Physics, 73(5), 2254-2258.
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Copyright 1993 AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in J. Appl. Phys. 73, 2254 (1993) and may be found at http://dx.doi.org/10.1063/1.353130