Abstract
This paper focuses on the insulation properties of nanocomposites, which are evaluated under divergent and homogeneous electric fields. Epoxy nanocomposites were made by dispersing nano-fillers. Various kinds of nano-fillers were used, such as layered silicate, silica and titania. Insulation breakdown tests by needle-plate and plate-plate electrode configuration were conducted on the nanocomposites. The insulation properties of nanocomposites are superior to those of the base epoxy resin under a divergent electrical field. In particular, the nanocomposite containing TiO2 nano-fillers shows unique properties. However, there was no significant difference between the base epoxy resin and the nanocomposites under homogeneous electric fields.
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