Dielectric spectrum analysis of compound dielectric with nano Fe ₃O ₄ modified and low density polyethylene

Nano Fe ₃O ₄ is a typical paramagnetic material, and its doping into low density polyethylene(LDPE) may affect the magnetic, dielectric and other properties of the LDPE matrix. To research the influence of doping nano Fe ₃O ₄ on the dielectric properties of LDPE, we prepared Fe ₃O ₄ ferrite nanoparticles used for preparation of polyethylene(PE) composite by the chemical co-precipitation method and modified by different methods, and prepared the nano Fe ₃O ₄ and LDPE composite materials with different mass fractions from 0.25% to 1% by melt blending. Moreover, we investigated the relationship of permittivity and dissipation factors dependence of frequency by broadband dielectric spectrometer. The conclusions can be drawn that doping Fe ₃O ₄ and magnetization will affect permittivity and dissipation factors, and the influential degree is related to the doping methods and quality percentage of Fe ₃O ₄ ferrite nanoparticles.