The effect of nano_SiOx partical on high field conduction in low-density polyethylene (LDPE)

High field conduction of the composite of low-density polyethylene (LDPE)/nano SiOx and pure polyethylene is studied at various temperatures in detail, as well as the effect of the contents of nano SiOx on high field conduction. On the base of analysing test data, it can be seen that Schottky effect and Poole-Frenkel effect do not fit all of samples, and the nano SiOx change the high field conduction of LDPE from space charge limited conduction (SCLC) to ion hopping conduction. In addition, the high field conduction of composition is smaller than that of pure LDPE in the same electrical phenomenon by the theory of trap energy level. It points out that the nano SiOx particals change the energy level of trap in LDPE. The density of deep trap in LDPE becomes higher and higher with the content of nano SiOx, which blocks movement of ions, and makes the current smaller.