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Temperature Dependence of the Thermal Diffusivity/Conductivity of Aluminum Nitride
Author(s) -
Jackson T. Barrett,
Donaldson Kimberly Y.,
Hasselman D. P. H.
Publication year - 1990
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1990.tb07622.x
Subject(s) - thermal diffusivity , laser flash analysis , thermal conductivity , materials science , thermal conductivity measurement , atmospheric temperature range , thermal conduction , nitride , crystallite , aluminium , range (aeronautics) , thermodynamics , thermal , conductivity , analytical chemistry (journal) , condensed matter physics , chemistry , composite material , metallurgy , physics , layer (electronics) , chromatography
The temperature dependence of the thermal conductivity of a polycrystalline AIN was measured using the flash‐diffusivity technique over a range of experimental conditions. Thermal conductivity data from room temperature to 300°C, obtained with attenuated laser pulse energies to minimize the specimen temperature increase, were found to be inversely proportional to the absolute temperature, as expected from theory. For high pulse energies, the experimental data deviated significantly from expected behavior. This latter effect is offered as an explanation for the anomalously low temperature dependence for the thermal conductivity reported in the literature.