Simultaneous measurement of heat capacity and thermal conductivity by thermal infrared radiation calorimetry

摘要

Instrumentation based on thermal radiation calorimetry (TRAC) is described. The system in which a disk-shaped specimen and a flat heater are mounted in a vacuum chamber is used. A theoretical formulation of the simultaneous measurement under quasi-steady state is described in detail. The specimens whose surfaces were blackened were used in the measurement. The hemispherical emissivity of the blackening substance was derived from mid- and far-infrared emission spectra. The validity of the calorimetry was confirmed from the results obtained by use of a Pyroceram 9606 specimen.