A high thermal conducting, electrically insulating, and non-oil bleed liquid thermal gap filler containing aluminum oxide (Al₂O_{310 µm}) and zinc oxide (ZnO_{0.6 µm}) in polydimethylsiloxane (PDMS) has been fabricated. An effective method of mixing 93 wt% filler in 7 wt% PDMS was achieved without surface modification. It was found that the thermal conductivity, hardness, dielectric constant, and dielectric loss tangent values increased with the variation of filler ratio. The S5 hybrid composite exhibits the highest thermal conductivity of 3.38 W/m K, which was 21.1 times higher than that of pure PDMS. The corresponding dielectric constant and dielectric loss were 7.968 and 0.03076 at 1 MHz. TGA results revealed that the variation of Al₂O₃/ZnO filler ratio improved the maximum decomposition temperature of the composite. Furthermore, no oil bleed was observed for the entire composites after 1 month. Thus, fillers with different particle sizes provide more significant filler packing density in the matrix and lower thermal resistance between adjacent conductive filler, resulting in high thermal conductivity composites.

制备了在聚二甲基硅氧烷（PDMS）中包含氧化铝（Al ₂ O _{310 µm}）和氧化锌（ZnO _{0.6 µm}）的高导热，电绝缘且不渗油的液体热间隙填充剂。无需表面改性即可实现将93 wt％填料与7 wt％PDMS混合的有效方法。结果发现，随着填料比的变化，导热系数，硬度，介电常数和介电损耗正切值增加。S5杂化复合材料的最高导热系数为3.38 W / m K，比纯PDMS高21.1倍。1 MHz时相应的介电常数和介电损耗为7.968和0.03076。TGA结果表明Al ₂ O的变化₃ / ZnO填充比提高了复合材料的最高分解温度。此外，在1个月后没有观察到整个复合材料的油渗出。因此，具有不同粒径的填料在基质中提供了更大的填料堆积密度，并在相邻的导电填料之间提供了较低的热阻，从而获得了高导热率的复合材料。