Roles of Fillers on Properties of Nano-TiO2 and Micro-SiO2 Filler Mixed Composites

Practical application is a primary concern in recent nanocomposite research. In an effort to use nanocomposites as insulating materials for heavy electric apparatus, titania nano-filler and silica micro-filler mixed composites were newly prepared for this study. These composites had the same low thermal expansion as aluminum and insulation breakdown properties superior to those of conventional insulating materials. Experimental results demonstrated that the titania nano-fillers enhance insulation breakdown properties and silica micro-fillers decrease thermal expansion. Moreover, these composites show synergy effects of filler mixture on insulation breakdown properties.