Evaluating nano composites for high voltage applications

A thermal model developed in this paper provides a plausible explanation to the improved corona resistance performance of nanocomposites. The model calculates the localized temperatures for different filler concentrations. Lower localized temperatures are achieved even at low nanofiller concentrations due to well dispersed nanofillers. This leads to better heat dissipation from the sample surface which is instrumental in higher discharge endurance of epoxy nanocomposites. Mechanical testing of the samples is conducted to evaluate the tensile strength and the stiffness (Young´s modulus) of the samples. The results showed that the nanocomposites demonstrated an equivalent tensile strength as the microcomposites while retaining the flexibility of the unfilled sample.