An electron-phonon coupling model for studying the effective thermal conductivity of nanocrystalline materials

2018 3rd International Conference on Insulating Materials, Material Application and Electrical Engineering

材料科学;无线电电子学;电工学

Liu, Yingguang^1 ; Dan, Yaru^1 ; Yan, Jie^1 ; Han, Xiao^1 ; Duan, Congcong^1

Department of Power Engineering, School of Energy and Power Engineering, North China Electric Power University, Baoding

071003, China^1

关键词: Analytical results;    Developed model;    Effective thermal conductivity;    Electron phonon couplings;    Grain interiors;    Grain size;    International researches;    Two Temperature Model;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/452/2/022145/pdf
DOI  :  10.1088/1757-899X/452/2/022145

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The thermal conductivity of Nan crystalline materials has become one of the most advanced topics in international research. In this work, the effective thermal conductivity of NC materials based on the two-temperature model of heat conduction was studied. In the frame work of the developed model, we take the Nan crystalline materials as a composite materials composed by grain interior and grain boundary affect zone. The obtained analytical results showed that: (i) the thermal conductivity increases with the increasing of grain size with respect to the electron-phonon coupling length;