Study on Trap Characteristics of Polypropylene Core-Shell Nanocomposite Dielectrics Based on Constant Temperature Discharge Current
摘要
In order to investigate the effect of Al2O3@SiO2 core-shell nanoparticles addition on trap characteristics of poly-propylene nanocomposite dielectrics, five kinds of polypropylene nanocomposite dielectrics with different core–shell nanoparticles addition amounts were prepared. Their carrier and trap distribution characteristics were analyzed by isothermal discharge current method. The results show that the addition of a small number of core-shell nanoparticles can introduce a large number of new traps, which have a stronger trapping effect on the carrier and reduce the carrier mobility. On the contrary, the addition of a large number of core-shell nanoparticles can weaken the deep trap characteristics, strengthen the shallow trap characteristics, make carrier detachment easier, and significantly increase carrier mobility.