The effect of ionizing and displacive radiation on the thermal conductivity of alumina
The effect of ionizing and displacive radiation on the thermal conductivity of alumina
复制标题
电离辐射和位移辐射对氧化铝导热系数的影响
DOI：
10.1063/1.353130
复制
发表时间：
1993
影响因子：
3.2
通讯作者：
D. P. White
中科院分区：
文献类型：
--
作者：
D. P. White
研究了电离辐射和位移辐射对氧化铝高温导热性能的影响。用几种散射机制的声子散射弛豫时间确定了它们对导热系数的影响。所考虑的散射机制是激发到导带中的电子、空位、铝沉淀物和空穴的散射。研究发现，在电导率和介电损耗正切大幅度增加的辐照条件下，声子-电子散射对热导率的影响不大。讨论了空位、铝沉淀和空洞引起的散射导致导热系数显著降低的条件。
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.