Thermal conductivity measurements of anisotropic bulk samples using the 3ω method
AuthorAthanasopoulos, G. I.
PublisherAffiliation: Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, Nicosia, 1678, Cyprus
Affiliation: Materials Science and Technology Department, University of Crete, P.O. Box 2208, Heraklion Crete 710 03, Greece
Correspondence Address: Athanasopoulos, G. I.
Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, Nicosia, 1678, Cyprus
SourceProceedings of the 30th International Thermal Conductivity Conference and the 18th International Thermal Expansion Symposium, Thermal Conductivity 30/Thermal Expansion 18
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The 3ω method has been applied to measure the anisotropic thermal conductivity of single crystals of SiO2 (quartz) and La 14-yCayCu24O41 (y = 9 and 10). A two-dimensional heat conduction model along with properly oriented metal heater strips have been employed to determine the in-plane and cross-plane thermal conductivity of these dielectric bulk oxides in the temperature range of 90-300 K. In addition, 3ω measurements on a single crystal of SiO2 (0001) using heaters of different width (12 μm and 32 μm) resulted in the same thermal conductivity value.
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