发明名称 |
FERRITE MAGNETIC MATERIAL AND FERRITE SINTERED MAGNET |
摘要 |
<p>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 ).</p> |
申请公布号 |
EP1693355(A1) |
申请公布日期 |
2006.08.23 |
申请号 |
EP20040820231 |
申请日期 |
2004.12.08 |
申请人 |
TDK CORPORATION |
发明人 |
MINACHI, YOSHIHIKO;NAGAOKA, JUNICHI;KURASAWA, SYUNSUKE;ITO, NOBORU;MURASE, TAKU;MASUDA, TAKESHI;TAKAGAWA, KENYA;UMEDA, HIDENOBU |
分类号 |
C04B35/26;C01G49/00;C04B35/632;H01F1/10;H01F1/11 |
主分类号 |
C04B35/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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