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Effects of nano-filler size, the degree of dispersion and coupling agents on tree breakdown time were investigated on epoxy/silica nanocomposites. As a result, it was found that tree breakdown time is prolonged, as the size of fillers size decreases, the degree of filler dispersion increases and coupling agents are added. Optimum size of nano fillers is obtained to be around 10 nm.
Epoxy/silica nanocomposites were investigated to clarify the effects of coupling agents and the degree of filler dispersion as for treeing breakdown V-t characteristics and PD (partial discharge) resistance performances. In the former case, it was clarified that homogeneous dispersion is critical to obtain satisfactory V-t characteristics, and that the addition of silane coupling agent would help...
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