Apparatus for the Measurement of the Thermal Diffusivity of Solids at High Temperatures

Abstract

An apparatus is described for measuring the thermal diffusivity of solids in the temperature range 30°–1000°C. It employs a method in which the dispersion and the attenuation of a thermal wave, propagated through the solid, are measured. The theory underlying this method is presented, and results are given of measurements on Armco iron and germanium.