Size Effects of Heat Conduction for Silicon Nanograins

Ya Fen Han; Hai Dong Liu

doi:10.4028/www.scientific.net/AMM.633-634.34

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 633-634Size Effects of Heat Conduction for Silicon...

Size Effects of Heat Conduction for Silicon Nanograins

Abstract:

The structure model of silicon nanograins was built. And then based the modification of the mean free path of phonons according to the size of nanograins, the expression of thermal conductivity in nanograins was obtained according to the phonon kinetic theory. The dependence of the thermal conductivity of silicon nanograins on size was investigated. The results showed that thermal conductivity of nanograins decrease with the reduction of characteristic sizes when the characteristic sizes of nanograins are comparable to or smaller than the phonon mean free path.

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Periodical:

Applied Mechanics and Materials (Volumes 633-634)

Pages:

34-37

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.633-634.34

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Online since:

September 2014

Authors:

Ya Fen Han*, Hai Dong Liu

Keywords:

Nanograins, Phonon, Size Effects, Thermal Conductivity

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