| 摘要 |
PROBLEM TO BE SOLVED: To obtain Mn-Zn based oxide magnetic material of high permeability and low loss, by uniformly enlarging crystal grain diameter and forming a grain boundary layer of high resistance. SOLUTION: In high permeability oxide magnetic material, Fe2O3 of 52-53 mol%, MnO of 24-28 mol%, and ZnO of 19-24 mol% are contained as main components, impurity SiO2 is restrained lower than or equal to 0.01 wt.%, and CaO of 0.01-0.10 wt.% and Ta2O5 of 0.005-0.08 wt.% are contained as subcomponent. In this case, mean crystal grain diameter is made 13-32 μm, and mean pore diameter is made 0.8-1.7 μm. |
