| 摘要 |
A ferrite magnetic material comprising a main phase of W-type is provided which has magnetic properties improved through the optimization of additives. The ferrite magnetic material comprises a main constituent having a compound represented by composition formula AFe 2+ a Fe 3+ b O 27 (wherein A comprises at least one element selected from Sr, Ba and Pb; 1.5‰¤a‰¤2.1; and 12.9‰¤b‰¤16.3), a first additive containing a Ca constituent (0.3 to 3.0 wt% in terms of CaCO 3 ) and/or a Si constituent (0.2 to 1.4 wt% in terms of SiO 2 ), and a second additive containing at least one of an Al constituent (0.01 to 1.5 wt% in terms of Al 2 O 3 ), a W constituent (0.01 to 0.6 wt% in terms of WO 3 ), a Ce constituent (0.001 to 0.6 wt% in terms of CeO 2 ), a Mo constituent (0.001 to 0.16 wt% in terms of MoO 3 ), and a Ga constituent (0.001 to 15 wt% in terms of Ga 2 O 3 ). |
