Microstructure and Temperature Dependence of Magnetic Properties of MnZnTiSn Ferrites for Power Applications

MnZnTiSn ferrties, prepared via the conventional ceramic process, by sintering at 1360 degrees C in N(2)-O(2) atmosphere with 4% oxygen, were characterized in terms of microstructures, magnetic properties and dc resistivity. Experimental results showed that TiSn-substitution remarkably improved magnetic properties and temperature stabilities of the MnZn ferrite ceramics. The effects of Ti(4+) and Sn(4+) substitution had certain synergistic effect. The sample, substituted with 0.2 mol% Ti(4+) and 0.1 mol% Sn(4+), possessed maximum density and initial permeability, together with minimum core loss, residual magnetic flux density and coercive force.