A contact method of determining the thermal effusivity of solids

Abstract

A contact method of measuring the thermal effusivity of solids, based on periodic heating of the surface of a standard plate, in contact with the solid being investigated, and measuring the temperature oscillations in the plate at various distances from the source, is described. preting the results of remote sensing. The contact method of determining the thermal effusivity of solids proposed in this paper is based on the excitation of plane temperature waves on the surface of a standard plate, which is in contact with the material being investigated, and measuring the temperature oscillations in the plate at different distances from the source. The method belongs to a group of time-varying methods of measuring thermal properties with periodic heating of the sample being investigated (7). It is based on a previously obtained solution of the nonstationary equation of heat conduction for the problem of the propagation of har- eC a C a === λρ λ ρ /,