以双组分室温硫化硅橡胶为基体树脂,Al_2O_3与Al(OH)_3为填料制备有机硅导热垫片。对垫片的导热性能、力学性能进行测试,并对影响渗油的因素进行分析。结果表明,随着填料量的增大,有机硅导热垫片的硬度、导热系数增大,渗油量减少;相同填料添加量时,官能团r[r=n(SiVi)/n(Si-H)]对渗油的影响较大,4种不同r值树脂制备垫片的渗油量随着r值增大而增大,当r=3.25时,甚至出现交联不完全现象;官能团比例相同时,交联密度较大的垫片,渗油量较小。 Two-component room-temperature vulcanized silicone rubber as matrix resin, Al 2 O 3 and Al (OH) 3 as fillers to prepare silicone thermal pad. Gasket thermal conductivity, mechanical properties of the test, and the factors that affect the oil leakage analysis. The results showed that the hardness and thermal conductivity of the silicone thermal pad increased, and the amount of oil leakage decreased with the increase of the filler content. When the same filler was added, the functional group r [r = n (SiVi) / n )] Had a greater influence on the oil leakage. The oil leakage of the four kinds of gasket with different r values ​​increased with the increase of r value, and even when r = 3.25, the phenomenon of incomplete crosslinking occurred. At the same time, cross-linked larger density gasket, less oil infiltration.