| 摘要 |
PURPOSE:To obtain a low-loss Mn-Zn ferrite which can reduce power loss drastically by using specific Fe2O3, MnO, and ZnO as basic components and then adding calcium, germanium, and tantalum oxides to the basic components as by-products. CONSTITUTION:A raw material with basic components which are Fe2O3 51.5-54.5mol.%, MnO: 30-40mol.%, and ZnO: 6-18mol.% is mixed as a final composition and then tentative baking is performing within atmosphere. 0.02-0.20wt.% calcium oxide which is converted to CaO, 0.03-0.40wt.% germanium oxide which is converted to GeO2, and 0.01-0.10wt.% tantalum oxide which is converted to Ta2O5 are added and mixed to the tentatively baked powder as sub- components. Furthermore. 0.01-0.60wt.% titanium oxide which is converted to TiO2 or 0.005-0.040wt.% silicon oxide which is converted to SiO2 or both of these are added and mixed, thus obtaining Mn-Zn soft ferrite with an extremely small power loss under a high magnetic field. |
