Reducing dielectric losses in MnZn ferrites by adding TiO2 and MoO3

We investigated the complementary effects of TiO₂ and MoO₃ additives on the magnetic properties, the core loss, and the dielectric properties of MnZn ferrites. We analyzed the composition factors influencing the permeability of MnZn ferrites. A high initial permeability base ZnO-MnO-Fe₂O₃ composition ratio was selected. Electrical and dielectric analyses indicated that the introduction of TiO₂ can improve the high-frequency loss properties of MnZn ferrite cores, but such introduction will also have a negative effect on the magnetic properties of the sintered samples. Introduction of MoO₃ can alleviate the negative influence of TiO₂ and also reduce the internal polarization intensity. As a result, the dielectric constant and corresponding dielectric loss may be reduced. We give experimental results in the paper.