METHODS AND AN APPARATUS FOR HETEROGENEITY CHARACTERIZATION AND DETERMINATION OF THERMAL CONDUCTIVITY OF MATERIALS

摘要

The methods of heterogeneity characterization and determination of thermal conductivity of materials provides for heating a surface of the heterogeneous solid samples during the movement of the samples relative to a heating source and a temperature recording unit. Prior to the measurements the measurement parameters are adjusted so as to provide the best spatial resolution and a required uncertainty of the measurements. Distributions of initial temperature on the surface of the samples before and after heating are measured and heterogeneity of the samples is estimated on the basis of the temperature change along the line of the temperature recording unit movement. Thermal conductivity of homogeneous regions of the samples is determined using solution of the coefficient inversed problem with the measured temperatures.