Method for producing Mn-Zn ferrite

摘要

The present invention provides a Mn-Zn ferrite which is low in the loss in the frequency range between a few 10 kHz and a few 100 kHz and high in the saturation magnetic flux density in the vicinity of 100°C. The present invention comprises the steps of compacting a powder having a specific surface area (based on the BET method) of 2.0-5.0 m 2 /g and a 50% particle size of 0.7-2.0 µm into a compacted body having a predetermined shape and obtaining a sintered body by sintering the compacted body. Preferably, the Mn-Zn ferrite comprises 54-57 mol-% Fe 2 O 3 , 5-10 mol-% ZnO, more than 0 to 4 mol-% NiO, and the balance substantially being MnO as main constituents.