Abstract
To reduce the insulation faults in GIS, it is still important to develop a new material for the epoxy spacer with high thermal and insulating properties. In this paper, six kinds of materials were prepared with different concentrations of 12-21 µm micro-alumina, 30 nm nano-alumina and 10 nm nano-titania fillers, i.e. neat epoxy, micro composite, two kinds of nano-composites, and two types of nano-micro-mixture-composites. Their thermal behavior, dielectric strength, dielectric spectrum were measured and analyzed. It is concluded that nano-filler addition can increase glass transition temperature and breakdown strength.
