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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Phonon Transport in Nanoporous Solids and Porous Crystals

Get access (open in a dialog) DOI: 10.1615/IHTC12.3200
12 pages

要約

The low phonon thermal conductivity of pore or "cage" containing crystalline solids (porous crystals) and nanoporous solids is addressed. The conductivity of zeolites is examined using a Green-Kubo formalism in classical molecular dynamics simulations and the conductivity of porous silicon is described using a phenomenological scattering (Boltzmann) treatment. The high-scattering, minimum conductivity limit is also discussed. For the zeolites, the effect of the cages on the structural statics and dynamics is shown to increase phonon scattering and decrease thermal conductivity. The pore scattering and the pore randomness cause the very low thermal conductivity of high porosity porous silicon.