Size effect on heat transfer performance of ZnO/Al2O3 interface materials

The aim of this paper is to provide a spanscale method to investigate and estimate the interfacial thermal conductivity (ITC) of ZnO/Al2O3; interface from the nanoscale to the microscale situation based on the non-equilibrium molecular dynamic (NEMD) method. Comparing the simulated with the experimental data, a fitting model of the ITC from the nanoscale to microscale is built to evaluate its changing rule. The results show that the ITC increased until bulking materials from the nanoscale to microscale. The scope of size effect area reduced to 30 nm from 600 nm and 330 nm comparing with each pure material. It means that the size effect of pure ZnO or Al2O3 materials can be avoided by compounding with Al2O3 or ZnO materials. It implies a potential method for electronic material design of packaging or micro/nano manufacturing.