| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a Mn-Ni-Zn type ferrite having squareness ratio remarkably increased without lowering the specific resistance and deteriorating other magnetic characteristics when Fe<SB>2</SB>O<SB>3</SB>component is controlled to <50 mol% and Fe<SP>2+</SP>content is decreased. <P>SOLUTION: The Mn-Ni-Zn type ferrite contains ≥45.0 mol% and <50.0 mol% Fe<SB>2</SB>O<SB>3</SB>, ≥0.1 mol% and ≤5.0 mol% NiO and ≥3.0 mol% and <15.5 mol% ZnO and the balance being MnO as base components and each content of P, B, S and Cl contained in the ferrite is controlled respectively to <50 massppm P, <20 massppm B, <30 massppm S and <50 massppm Cl. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
