Patent ID: 7481947

Claim:
A ferrite magnetic material, characterized in that: a main constituent has 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 comprises a Ca constituent (0.3 to 3.0% by weight in terms of CaCO 3 ) and/or a Si constituent (0.2 to 1.4% by weight in terms of SiO 2 ); and a second additive comprises at least one of an Al constituent (0.01 to 1.5% by weight in terms of Al 2 O 3 ), a W constituent (0.01 to 0.6% by weight in terms of WO 3 ), a Ce constituent (0.001 to 0.6% by weight in terms of CeO 2 ), a Mo constituent (0.001 to 0.16% by weight in terms of MoO 3 ), and a Ga constituent (0.001 to 15% by weight in terms of Ga 2 O 3 ); and the ferrite magnetic material comprises a main phase of W-type hexagonal ferrite.