Measurement of the thermal conductivity and thermal diffusivity of natural rocks at low temperature

A method for measuring the thermal characteristics of natural rocks at low temperature is developed. The advantage of the experimental technique is that both thermal conductivity and thermal diffusivity are obtained from the same run by interpreting two parts of the temperature profiles. The quasi-steady state is used for thermal conductivity, and the thermal diffusivity is obtained from the asymptotic transient state (Fourier transient state).