Abstract
We propose a method of measuring some thermophysical properties of solid materials, by utilization of periodic heat source. A thermal flux is provocated in limited solids by sinusoïdal thermal causes, applied on surface. We determine effusivity of an unknown sample showing at mean a plane face, by simple contact with the measuring apparatus. Inserting detectors in the material, we can obtain diffusivity. Then calculatus gives conductivity and specific heat. Influence of thermal contact resistances and finite dimensions of thermal source are examined. We describe apparatus and optimal experimental conditions. We apply this method in a suitable temperature interval between 20 and 100°C to different samples: marble, alumina, boron nitride, then to a good thermal conductor material: beryllium oxide.
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