Effects of Nano-A1N on Dielectric Properties of Epoxy Resin Composites

The high thermal conductivity of epoxy resin/nanometer A1N composite can reduce the failure of superconducting insulation system. In this paper, nano A1N/ epoxy resin composites with different contents of 0%, 0.1%, 0.3%, 0.5% and 1% were prepared, and the dielectric properties of the composites were measured. The results showed that the doping of a certain content of nanometer A1N would increase the dielectric constant of the epoxy resin composite, but had little effect on the dielectric loss. Moreover, doping with appropriate amount of nano-AIN could improve the electrical tree resistance of the epoxy resin and its insulation breakdown performance.