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首页> 外文期刊>IEEE Transactions on Dielectrics and Electrical Insulation >Nonlinear conduction and surface potential decay of epoxy/SiC nanocomposites
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Nonlinear conduction and surface potential decay of epoxy/SiC nanocomposites

机译：环氧/ SiC纳米复合材料的非线性导电和表面电势衰减

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摘要

The nonlinear conduction of polymeric insulation may solve the surface charge accumulation, avoiding the distortion of electric field and the flashover phenomenon. As the silicon carbide (SiC) powder is usually used to improve the nonlinear conduction of polymer composites, the epoxy/SiC nanocomposites are prepared and the dc conductivity, permittivity and isothermal surface potential decay characteristics are investigated. The experimental results show that the conduction of high filler loading is field dependent and is attributed to a new conduction mechanism. The permittivity is closely related to the interaction zone around nanoparticles. The isothermal surface potential decay characteristics are greatly affected by the charging polarity, charging level and filler loading. The investigation indicates that the nonlinear conduction plays an important role in the surface potential decay.
机译：聚合物绝缘的非线性传导可以解决表面电荷的积累，避免了电场畸变和闪络现象。由于通常使用碳化硅（SiC）粉末来改善聚合物复合材料的非线性传导，因此制备了环氧/ SiC纳米复合材料，并研究了直流电导率，介电常数和等温表面电势衰减特性。实验结果表明，高填充载荷的传导与电场有关，并归因于一种新的传导机制。介电常数与纳米颗粒周围的相互作用区域密切相关。等温表面电势衰减特性受充电极性，充电水平和填充剂负载的影响很大。研究表明，非线性传导在表面电势衰减中起重要作用。

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