The tracking and erosion performance of silicone rubber incorporated with novel TiO₂@SiO₂ core-shell nano fillers under the IEC 60587 standard

Abstract

In last two decades a promising performance improvement in the electrical insulation materials has been reported by many researchers using different nano fillers (NFs). In recent years another type of NFs called core-shell type nano fillers have shown even more attention than ordinary NFs. The coreshell NFs are a combination of nano particle core coated with outer nano layer of different material. The core-shell NFs combine the beneficial properties of two material with in one NF. Recently a few studies have reported a considerable improvement in the dielectric properties of epoxy by utilising TiO 2 @SiO 2 core-shell NFs. The TiO 2 @SiO 2 particles have a core of TiO 2 coated with an out layer of SiO 2 at nano level. This study investigates the improvement in tracking performance of silicone rubber (SiR) using TiO 2 @SiO 2 core-shell nano particles which has not been reported previously. The tracking immunity of low (below 1%) and high (above 1%) filler concentrations of nano TiO 2 @SiO 2 incorporated into SiR was investigated according to IEC 60587. The results showed that an optimum percentage of 0.6 wt% of TiO 2 @SiO 2 imparts best immunity to silicone rubber against tracking.

Tailoring the properties of epoxy/silicone blends for high-voltage capacitor applications

“…To modify the dielectric characteristics of epoxy resin, a range of nanoparticles have been utilized, including ZnO, Al 2 O 3 , SiO 2 , TiO 2 , BN, AlN, and other fillers. In [14,[30][31][32][33], the study looked at the dielectric characteristics of epoxy nanocomposite with low inorganic nano-filler concentrations. The permittivity of the interphase between the polymer and nanoparticles in a nanocomposite has a major influence on the electric field distribution and AC breakdown strength of the nanocomposite, according to [30].…”