发明名称 |
POWDER FOR MAGNETIC CORE, POWDER MAGNETIC CORE, AND THEIR PRODUCTION METHODS |
摘要 |
<p>A method for producing a powder for a magnetic core, in which an alkoxide film formation step and a silicone resin film formation step are carried out to form an insulation film composed of an alkoxide film and a silicone resin film on the surface of a pure iron powder, wherein the alkoxide film formation step comprises immersing a pure iron powder in an alkoxide-containing solution which is prepared by mixing a Si alkoxide having at least one organic group having a polar group comprising at least one of N, P, S and O atoms and an Al alkoxide with a dehydrated organic solvent, and drying to remove the dehydrated organic solvent, thereby forming an alkoxide film comprising an Al-Si-O type composite oxide on the surface of the pure iron powder; and the silicone resin film formation step comprises immersing the pure iron powder having the alkoxide film formed thereon in a silicone resin-containing solution which is prepared by mixing a silicone resin with an organic solvent, and drying to remove the organic solvent, thereby forming a silicone resin film on the alkoxide film.</p> |
申请公布号 |
EP2221836(B1) |
申请公布日期 |
2015.07.29 |
申请号 |
EP20080845521 |
申请日期 |
2008.10.30 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
TAJIMA, SHIN;TANI, MASAAKI;OKAMOTO, DAISUKE;HOSHINA, EISUKE;KISHIMOTO, HIDEFUMI;ICHIGOZAKI, DAISUKE |
分类号 |
H01F1/24;B22F1/00;B22F1/02;B22F3/00;C21D6/00;H01F1/26;H01F41/02 |
主分类号 |
H01F1/24 |
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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