基于铜粉的导热导电硅脂制备及性能研究
Preparation and Properties of Thermal and Electrical Conductive Silicone Grease Based on Copper Powder

以球形铜粉、氧化锌为功能填料，然后以二甲基硅油为基体，制备导热导电硅脂，并研究了铜粉与氧化锌不同复配比例对其性能的影响。结果表明，以球形铜粉为主填料，可构建高效导热、导电网链，同时引入一定量的小粒径氧化锌，能优化导热网络，进一步增强导热性能，并提升体系的稳定性。当铜粉与氧化锌比例为2:1时，所制备的导热导电硅脂具有良好的综合性能，导热系数达到2.5 W/m？K，体积电阻率为1.32 Ω？cm，黏度为287 Pa？s且油离度为0.2%。
Thermal and electrical conductive silicone grease was prepared by using spherical copper powder and ZnO as functional fillers and dimethyl silicone oil as matrix. The effect on properties of silicone grease by different proportions of copper powder and ZnO was studied. The result showed that the spherical copper powder as the main filler could build an efficient thermal and electrical conductive network. Then adding a certain amount of small particle size ZnO could promote thermal conduction, further enhancing the stability of silicone grease. When the proportion of copper powder to ZnO was 2:1, the silicone grease reached good comprehensive properties, the thermal conductivity was 2.5 W/m？K, the volume resistivity was 1.32 Ω？cm, the viscosity was 287 Pa？s and the oil dispersion was 0.2%.