Influence of PbO and TiO2 additives on the microstructure development and magnetic properties of Ni–Zn soft ferrites

This paper focuses on the effect of PbO and TiO2 on the magnetic properties and microstructural development of Fe2Ni0.64Zn0.36O4 soft ferrite. Ferrite was added to these oxides, ranging from 0 to 3.2 wt% in steps of 0.4 wt%. The results showed that with increasing the amount of PbO up to a certain percentage, relative density, grain size and magnetic permeability increase and then decrease. This additive caused to increase DC-resistivity, power loss and decrease in magnetic permeability and saturation magnetization. TiO2 revealed no considerable effect on the grain growth and densification. In contrast this additive due to the doping of the high valent Ti4+ ions to the lattice affects the magnetic and electrical properties noticeably. TiO2 improved the loss properties (up to 1.2 wt%) and magnetic permeability (up to 2.0 wt%) but reduced the saturation magnetization, and DC-resistivity of ferrite.