TITLE

Determination of the intrinsic temperature dependent thermal conductivity from analysis of surface temperature of laser irradiated materials

AUTHOR(S)
Elhadj, Selim; Matthews, Manyalibo J.; Yang, Steven T.; Cooke, Diane J.; Stolken, James S.; Vignes, Ryan M.; Draggoo, Vaughn G.; Bisson, Scott E.
PUB. DATE
February 2010
SOURCE
Applied Physics Letters;2/15/2010, Vol. 96 Issue 7, p071110
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An experimental and analytical approach is described to determine the temperature dependent intrinsic lattice thermal conductivity, k(T), for a broad range of materials. k(T) of silica, sapphire, spinel, and lithium fluoride were derived from surface temperature measurements. Surfaces were heated from room temperature up to 3000 K using a CO2-laser irradiance ≤5 kW/cm2. The solution of the nonlinear heat flow equation was used to extract parameters of k(T)=A×T[variant_greek_epsilon], where -1.13≤[variant_greek_epsilon]≤0 depending on the material. Results generally show good agreement with reported k(T). Below evaporation, the phonon-only k remains the dominant heat transport mechanism during laser heating.
ACCESSION #
48199504

 

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