Heat conductivity of particle stacking structured SiO2 porous film

Zhilin Xia; Yuting Wu

doi:10.1117/12.910379

12 January 2012 Heat conductivity of particle stacking structured SiO₂ porous film

Zhilin Xia, Yuting Wu

Proceedings Volume 8206, Pacific Rim Laser Damage 2011: Optical Materials for High Power Lasers; 82060F (2012) https://doi.org/10.1117/12.910379
Event: Pacific Rim Laser Damage Symposium: Optical Materials for High Power Lasers, 2011, Shanghai, China

Abstract

Particle stacking structured SiO₂ porous films were prepared by sol-gel method. A model has been established to analyze the heat conductivity of these films. It is assumed that the heat energy mainly transfers through particles and their contact points. In particle stacking structured materials, a particle contacts with twelve contiguous particles, and forms twelve heat conduction branches. This model is suit to the conditions that: the size of particles in the porous material is uniform; heat conductivity of particle skeleton is much greater than particle clearance; and all contact area between particles approximately equal. The results show that: heat conductivity of particles stacking porous material is anisotropic, material heat conductivity depends on that of the particle skeleton and the ratio between radiuses of particle contact area and particle itself.

Citation Download Citation

Zhilin Xia and Yuting Wu "Heat conductivity of particle stacking structured SiO₂ porous film", Proc. SPIE 8206, Pacific Rim Laser Damage 2011: Optical Materials for High Power Lasers, 82060F (12 January 2012); https://doi.org/10.1117/12.910379

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