Theory of Thermal Conduction in Thin Ceramic Films

被引：0
作者：
P. G. Klemens
机构：
[1] University of Connecticut,Department of Physics
来源：
International Journal of Thermophysics | 2001年 / 22卷
关键词：
graphene; lattice defects; oxides; phonons; pores; thermal radiation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The theory of heat conduction in ceramics by phonons, and at high temperatures also by infrared radiation, is reviewed. The phonon mean free path is limited by three-phonon interactions and by scattering of various imperfections. Point defects scatter high-frequency phonons; extended imperfections, such as inclusions, pores, and grain boundaries, affect mainly low-frequency phonons. Thermal radiation is also scattered by imperfections, but of a larger size, such as splat boundaries and large pores. Porosity also reduces the effective index of refraction. For films there are also external boundaries, cracks, and splat boundaries, depending on the method of deposition. Examples discussed are cubic zirconia, titanium oxide, and uranium oxide. Graphite and graphene sheets, with two-dimensional phonon gas, are discussed briefly.
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页码：265 / 275
页数：10
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