Electrical and magnetic properties of ZrO2-doped lithium-titanium-zinc ferrite ceramics

Abstract This report documents the effect of 0–3 wt% ZrO 2 additive on the electrical and magnetic properties of LiTiZn ferrite. Ferrite powder of Li 0.65 Fe 1.6 Ti 0.5 Zn 0.2 Mn 0.05 O 4 composition was synthesised at 900 °C for 4 h in air. Ferrite ceramics doped with ZrO 2 were sintered at 1010 °C for 2 h in air. A spreading resistance analysis showed that LiTiZn ferrites exhibited nonuniform distribution of depth DC resistivity, which varied in the range of (0.25–2.3) × 10 9  Ω⋅cm depending on the amount of additive. Zirconia also affected the magnetic properties of ferrite so that the magnetisation increased and the initial permeability decreased as the ZrO 2 content increased. In addition, the Curie temperature varied. The permeability spectra measured in the frequency range from 10 MHz to 18 GHz changed depending on the zirconia content.