Corona ageing tests of RTV and RTV nanocomposite materials

Silicone rubber insulating materials are superior to conventional porcelain materials, whose special water repellency and transfer of water repellency is favorable in power industry. However, two points are concerned in its application, and these are long-term reliability and lack of methods to assess their long-term performance. Corona and arc are important factors that induce degradation of RTV insulating materials during operation. Nanomaterials are used to modify the properties of RTV silicone rubber. Corona aging tests have been conducted, and the results of water repellency and IR analyses show that these nanomaterials can markedly improve its corona aging performance.