Thermal conductivity of Al nanoclusters filled mesoporous MCM-41
MCM-41 consists of a hexagonal array of long, unconnected cylindrical pores with diameters that can be tailored within the range 1.6-10nm. As a porous silica nano-material, MCM-41 is thought to have a special thermal conductivity and is a promising porous substrate for mesoporous composites with high or low thermal conductivity. In this paper, the structural unit of MCM-41 is established firstly and the Equilibrium Molecular Dynamics (EMD) simulation is performed to get the shell thermal conductivity of MCM-41. Then, based on one-dimensional heat transfer analysis, the mathematical expression for effective thermal conductivity of Al nanoclusters filled mesoporous MCM-41 is obtained by coupling thermal conduction of Al nanoclusters combined with air in nanopores. Finally the results are obtained, and it turns out that the effective thermal conductivity of Al nanoclusters filled mesoporous MCM-41 depends on the thermal conductivity of shell, thermal conductivity of fillers and the porosity of MCM-41. The effective thermal conductivity increase dramatically with increasing filling ratio of pores as the ratio is great than 90％.
Yanhui Feng Congliang Huang Xinxin Zhang Jing Li Ge Wang Mu Yang Xiubing Huang
Department of Thermal Engineering, University of Science and Technology Beijing，Beijing, 100083, P.R School of Materials Science and Engineering,University of Science and Technology Beijing Beijing, 10
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
1210-1217
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）