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王琦,王函,李森,郭钊颖.氮化铝基导热复合材料的制备及性能研究[J].稀有金属材料与工程(英文),2020,49(2):629~633.[Qi Wang,Han Wang,Sen Li and Zhaoying Guo.Preparation and Properties of AlN-Based Thermal Conductive Composites[J].Rare Metal Materials and Engineering,2020,49(2):629~633.]
Preparation and Properties of AlN-Based Thermal Conductive Composites
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Received:April 01, 2019  Revised:May 08, 2019
Key words: Aluminum Nitride  Thermal Conductive Composites  Thermal Conductivity
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Qi Wang,Han Wang,Sen Li and Zhaoying Guo  
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      In this study, thermal conductive composites with various filling fraction were prepared using angular and spherical AlN powders as fillers and PDMS as organic matrix. The influence of particle morphology, filling fraction and surface treatment on the viscosity and thermal conductivity of composites were deeply investigated. The results indicated that the AlN spherical powders could significantly reduce the viscosity of composites compared with the AlN angular powders, which was in favor of obtaining higher filling fraction and larger composite thermal conductivity. In addition, the surface treatment of AlN powders with KH570 were beneficial to reduce the interface thermal resistance and improve the composite thermal conductivity. When the concentration of KH570 was 2.0wt%, a highest composite thermal conductivity were obtained, which was ~22.5% higher than that of untreated fillers.