| 摘要 |
PROBLEM TO BE SOLVED: To obtain an Mn-Zn-based ferrite having high μi on the lower temp. side (>=20 deg.C), maintaining stable magnetic characteristics against a change of the environmental temp. (-10 to +70 deg.C) and suitable for a transformer for communications. SOLUTION: The Mn-Zn-based, ferrite consists of 51-54 mol.% Fe2 O3 , 20-25 mol.% ZnO and the balance manganese oxide, further contains 0.002-0.04 wt.% Cab, 0.002-0.015 wt.% Sin, and 0.02-0.12 wt.% CoO as subsidiary components and has an initial permeability of >=10,000 within the temp. range of -20 to 100 deg.C. |
