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将纳米碳化硅填加到硅橡胶中,可以获得具有非线性电导特性的纳米碳化硅/硅橡胶复合物.本文研究了质量分数分别为5 wt%,15 wt%,30 wt%,45 wt%的纳米碳化硅/硅橡胶复合物的非线性电导特性,建立了电导率与场强的函数关系,分析了复合物的非线性电导机理,并测试了复合物的介电谱特性和击穿特性.为了探讨非线性碳化硅/硅橡胶复合物应用于电缆终端和复合绝缘子以均匀其电场分布的可能性,应用COMSOL Multiphysics软件,对电缆终端和复合绝缘子中的电场分布进行了仿真分析.仿真结果表明,将纳米碳化硅/硅橡胶复合物应用于电缆终端应力锥的绝缘部分,以及应用于复合绝缘子的端部,可以有效地降低其最大场强.
Nano-SiC can be obtained by adding nano-silicon carbide into silicon rubber, and the nano-silicon carbide / silicone rubber composites with nonlinear conductivity can be obtained.In this paper, the composites of 5%, 15%, 30%, 45% , The nonlinear conductivity of the nanocomposite / silicon rubber composites was established. The relationship between the conductivity and the field strength was established. The nonlinear conductance mechanism of the composites was analyzed. The dielectric properties and breakdown properties In order to investigate the possibility of using nonlinear silicon carbide / silicon rubber composites in cable terminations and composite insulators for uniform electric field distribution, the electric field distribution in cable terminations and composite insulators was simulated using COMSOL Multiphysics software. It shows that the application of nano-silicon carbide / silicone rubber composite to the insulation part of cable terminal stress cone and to the end of composite insulator can effectively reduce the maximum field strength.