FRONT-SURFACE TECHNIQUE FOR THERMAL CONDUCTIVITY MEASUREMENT OF COMPOSITES

This paper has suggested a new method, front surface technique.It is a transient-state technique for the measurement of thermal conductivity of heterogenous and anisotropic composites.In this method the front surface of a cylindrical shaped specimen(diameter 10 mm,length 10-20 mm) is subjected to a burst of radiant energy coming from a laser. The resulting temperature change of the front surface of the specimen is recorded and thermal conductivity is computed from the temperature change of the front surface. This rrythod is developed on the basis of the Parker's method and has many advantages such as suitable size of specimen, fast sped of measurement and wide range of application etc, Theoretical model, formulas and the measuring results have been described in present paper.