Thermal diffusivity measurement of opaque materials at very high temperature by a modulated technique
Jean-Marc Goyheneche, Michel Laurent, Jean-François Sacadura, Michel Ferri, Christian Fort
A study of the thermal diffusivity measurement of opaque materials up to 2500 K by a modulated technique is presented. A cylindrical sample is symmetrically heated by two xenon arc lamps. Modulation of one of the two lamps causes a periodic change in the sample temperature. An identification technique allows the thermal diffusivity of the material to be evaluated, based on the measurement of shifts between the temperature recorded on each planar side of the sample and the incident flow.