Study on preparation and dielectric properties of Nano-Ag/Epoxy Resin composite

Nano-Ag can be prepared through ultraviolet radiation reduction reaction and then the influence on nano-Ag particles by protecting agent, intensity of radiation and mixture ration is studied. The TEM result shows that Ag particles are dispersed evenly and the particle size is about 20 nm. Nano-dielectric with nano-Ag in epoxy resin is prepared successfully. The dielectric property of the composite is discussed. The result is that resistivity (rho v ) and breakdown electric-field intensity (E b ) in room temperature of the composite are improved; the dielectric loss (tandelta) is reduced and the permittivity (epsiv r ) changes little. It can be seen that the dielectric property of base polymer material is improved by adding nano-Ag particles. This phenomenon is explained by Coulomb block effect