Study of Thermal Properties of Insulating Materials

This paper describes a new method of thermal parameters determination. It is based on the measurement of temperature responses after delivery of heat from a heat source. The method is based on the combination of a step-wise and a ramp-wise heating. It can be used for the study of solid and liquid materials and give new information about temperature dependences of transport and thermal parameters in one step. The measured data are used as input of multi parametric regression method for the determination of transport parameters (the diffusion and relaxation time, and heat absorption coefficient). The thermal parameters (the thermal diffusivity a, thermal conductivity lambda, and specific heat c) can be also determined from the transport parameters. The dependences of all parameters together with the heat source quality coefficient alpha (or the source fractal dimension D) and losses parameter R on temperature from interval 20 degrees C to 33 degrees C were calculated.