| 摘要 |
PROBLEM TO BE SOLVED: To provide an Mn-Zn soft ferrite having excellent initial permeability (μi) and factor of merit in a high frequency wave zone of 500kHz to 1MHz. SOLUTION: This ferrite consists of the fundamental component constitution of MnO of 20 to 30mol%, ZnO of 18 to 25mol% and the remaining part consisting of Fe2 O3 , and it contains SiO2 of 0.005 to 0.02wt.%, CaO of 0.005 to 0.20wt.%, SnO2 of 0.5 to 7wt.% and/or TiO of 0.25 to 4wt.%. The ferrite is an Mn-Zn soft ferrite having a DC specific resistance of 30Ω/cm or higher and the dielectric constant of 100,000 or smaller at 1kHz, its initial permeability (μi) at 500kHz becomes 6000 or higher, and the factor of merit becomes 1 or higher. |
