Insulation properties of nano- and micro-filler mixture composite

This paper presents the electrical insulation properties of a newly-developed composite material comprising a nano- and micro-filler mixture. The filler mixture composite was made by dispersing layered silicate fillers and silica fillers in epoxy resin. The filler mixture composite had the same low thermal expansion as aluminum. Moreover, comparison with other composites demonstrated the effects of the filler mixture. The filler mixture composite showed excellent insulation breakdown properties in needle-plate electrode geometry. Microscope observation indicated a densely-packed structure of the filler mixture composite. The morphological feature seems to have an impact on the improvement of insulation breakdown properties.