The Pressure and Temperature Dependence of Thermal Conductivity for Nonmetal Crystals

The pressure (p) and temperature (T) dependences of thermal conductivity (k) for nonmetal crystals are discussed. The equations KT=A+Bp at low pressures and kp＝A1+B1/T at low temperatures that fitted from experimental data are developed in theory, where A, B, A1 and B1 are fitting constants and the subscripts T and p refer isothermal and isobaric, respectively. The calculated results are in good accord with the experimental result. The responses of k under high pressure-high temperature and shock compressions are discussed as well.