Polymeric insulating materials like an epoxy resin due to their excellent electric performance and a maintenance performance are commonly applied to various power equipment. Additives and fillers are traditionally added into the epoxy resin to improve the mechanical and thermal properties. The epoxy/hollow particle composites have been developed to produce the composite material which has new function like the low dielectric constant, the lightweight, and the high heat insulation. To understand the basic electrical properties of epoxy/hollow silica composites, the capacitance measurement, the breakdown test and the partial discharge measurements were performed. The breakdown strength of the epoxy/hollow silica composites and the breakdown strength of the epoxy/no hollow silica (normal silica) composites were almost the same regardless of the applied voltage waveform. The AC breakdown voltage at the 0‐peak of the epoxy/hollow silica composites also agreed with the DC breakdown voltage of that. Furthermore, the PDIV of the epoxy/hollow silica composites was almost the same compared to that of epoxy/normal silica composites. The continuous partial discharge in the hollow region did not cause the breakdown, and the existence of the interface between the silica particle and the epoxy resin might lead to the breakdown.

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空心二氧化硅的添加对环氧/空心二氧化硅复合材料基本电学特性的影响

诸如环氧树脂的聚合物绝缘材料由于其优异的电性能和维护性能而被普遍应用于各种电力设备。传统上，将添加剂和填料添加到环氧树脂中以改善机械性能和热性能。已经开发出环氧/空心颗粒复合材料以生产具有低介电常数，轻质和高隔热性等新功能的复合材料。为了了解环氧/空心二氧化硅复合材料的基本电性能，进行了电容测量，击穿测试和局部放电测量。不管施加的电压波形如何，环氧/空心二氧化硅复合材料的击穿强度和环氧/无空心二氧化硅（普通二氧化硅）复合材料的击穿强度几乎相同。环氧/空心二氧化硅复合材料在0峰的交流击穿电压也与直流击穿电压一致。此外，环氧/空心二氧化硅复合材料的PDIV与环氧/普通二氧化硅复合材料的PDIV几乎相同。在中空区域的连续局部放电不会引起击穿，并且二氧化硅颗粒和环氧树脂之间的界面的存在可能导致击穿。环氧/空心二氧化硅复合材料的PDIV与环氧/普通二氧化硅复合材料的PDIV几乎相同。在中空区域的连续局部放电不会引起击穿，并且二氧化硅颗粒和环氧树脂之间的界面的存在可能导致击穿。环氧/空心二氧化硅复合材料的PDIV与环氧/普通二氧化硅复合材料的PDIV几乎相同。在中空区域的连续局部放电不会引起击穿，并且二氧化硅颗粒与环氧树脂之间的界面的存在可能导致击穿。