Effects of WO3 substitution on electromagnetic properties of NiCuZn ferrite

The effects of WO3 addition on the electromagnetic properties of NiCuZn ferrite prepared by usual ceramic technology were investigated. Experimental results show that the substitution of W6+ ions in NiCuZn ferrite can improve not only electromagnetic properties but also microstructures of sintered ceramic. Along with the reduction of average grain size, pores at grain boundaries decrease with the increasing WO3 contents. The real part of complex permittivity ε′ and the bulk density increase with the increasing amount of W6+ ions. Meanwhile, the resonance frequency increases on the condition of deterioration of the real part of complex permeability μ′.