The Boltzmann Equation Of Phonon Thermal Transport Solved In the Relaxation Time Approximation – II – Data Analysis

As discussed in a previous paper [1], the thermal transport in dielectric solids can be obtained by using the Boltzmann equation of an assembly of phonons subjected to a thermal gradient. Solving this equation in the framework of the relaxation time approximation, from the phonon distribution that we obtain, the thermal conductivity of the solid can be easily given. Here we use such an approach to analyse the data of the thermal conductivities of some dielectric materials.