Pressure dependence of thermal conductivity for lithium fluoride to 36 GP
POSTER
Abstract
Room-temperature measurements of the thermal conductivity of single-crystal LiF compressed in a diamond-anvil cell show an increase from k = 12.8 (+/- 1.3) Wm-1K-1 to 38.5 (+/- 5.2) Wm-1K-1 from 0-36 GPa. Our time-domain thermal reflectance (TDTR) experiments imply a compression dependence of (∂logk/∂logr)T = 3.8 for LiF, in general agreement with theoretical expressions for phonon scattering in dielectrics. Lithium fluoride is commonly used as a window material in dynamic compression experiments, and our thermal conductivity measurements provide new constraints on the corrections that need to be applied to shock temperatures measured on opaque samples.
Presenters
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Mercedes M Vasquez
University of California, Berkeley
Authors
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Mercedes M Vasquez
University of California, Berkeley
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Chris P McGuire
Lawrence Livermore National Laboratory
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Suixuan Li
University of California, Los Angeles
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Yongjie Hu
University of California, Los Angeles