A Dynamic Thermoradiometer for Measuring Thermal Radiation of Materials

A method for measuring the thermal-radiation characteristics of materials, which uses the concept of a dynamic calorimeter with a solid absorber, is considered. A thin disk with a high thermal conductivity is heated by an external radiation source, and the difference in the rate of its temperature change is measured in the presence and in the absence of a sample. The method allows the simultaneous measurement of the reflection and radiation coefficients over a wide temperature range. The results of the measurements of the thermal-radiation characteristics of the reference materials under equilibrium conditions and in the dynamic heating mode are presented.