Study of P Influenced to Magnetic Characteristics of Mn-Zn Ferrites for Power Applications

Abstract
We examined that influence of P which changes magnetic characteristics of Mn-Zn ferrites for power applications. As quantity of P increase, larger size grains were formed in the microstructure of ferrite and as the result, core loss increased. We found that P had high solubility on ferrite. Therefore, we supposed that P should generate a great deal of liquid phase even if the amount of P is small. Then, the melting point of ferrite-P was relatively low. As the result, we considered that the large grain is caused by liquid phase.