A Prediction Model of Thermal Conductivity for Composite Materials with Nanoparticles

摘要

In this study, the transport theorem of phonons and electrons is utilized to create a model to predict the thermal conductivity of composite materials with nanoparticles. By observing or assuming the particle displacement in the matrix, a physical model between particles and matrix can be built. The composite material then can be divided into several regions. The regions construct the thermal resistance network. In each region, the phonon or electron scattering caused by boundaries, impurities, or U-process was taken into account to calculate the thermal conductivity. The overall thermal conductivity then can be derived from the thermal resistance network. The model is used to predict the thermal conductivity for several composite materials with nanoparticles. The results show a pretty good agreement with previous studies in literatures. Based on the model, some discussions about particle size are also made.