| 摘要 |
PURPOSE:To obtain a Mn-Zn based ferrite high in permeability and excellent in temp. characteristics by restricting the composition of the Mn-Zn based ferrite and specifying initial permeability and the rate of change thereof. CONSTITUTION:The Mn-Zn based-ferrite contains 52.5-53.0mol.% Fe2O3, 22-25mol.% ZnO and balance MnO and is >=8000 in initial permeability mu at -200-100 deg.C and <=70% in rate of change. In the ferrite, it is the reason why restricting the component that the initial permeability nearly at room temp. can not attain >=8000 since the secondary peak (Ts) becomes minus side due to the temp. characteristics of the initial permeability when Fe2O3 is >=53mol.% and when Fe2O3 is <=52.5mol.%, the secondary peak is in high temp. side and the initial permeability mu in the minus side can not attain >=8000. |
