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Modified effective medium formulation for the thermal conductivity of nanocomposites

Appl. Phys. Lett. 91, 073105 (2007); doi:10.1063/1.2771040

Published 14 August 2007

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Austin Minnich and Gang Chen
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
This letter introduces a modified effective medium formulation for composites where the characteristic length of the inclusion is on the order of or smaller than the phonon mean free path. The formulation takes into account the increased interface scattering in the different phases of the nanocomposite and the thermal boundary resistance between the phases. The interface density of inclusions is introduced and is found to be a primary factor in determining the thermal conductivity. The predictions are in good agreement with results from Monte Carlo simulations and solutions to the Boltzmann equation. ©2007 American Institute of Physics
History: Received 5 July 2007; accepted 20 July 2007; published 14 August 2007
Permalink: http://link.aip.org/link/?APPLAB/91/073105/1
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KEYWORDS and PACS

Keywords
PACS
  • 72.15.Eb
    Electrical and thermal conduction in crystalline metals and alloys
  • 61.72.Qq
    Microscopic defects (voids, inclusions, etc.)
  • 63.22.+m
    Phonons or vibrational states in low-dimensional structures and nanoscale materials
  • 63.20.Dj
    Phonon states and bands, normal modes, and phonon dispersion
  • YEAR: 2007

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
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REFERENCES (12)
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