发明名称 |
Iron nitride magnetic powder and method of producing the powder |
摘要 |
An iron nitride magnetic powder consisting primarily of Fe<SUB>16</SUB>N<SUB>2 </SUB>phase whose average particle diameter determined by particle size measurement using a TEM micrograph is 20 nm or less and whose geometric standard deviation of the particle diameter is 1.4 or less. The iron nitride magnetic powder can be obtained by a method of producing an iron nitride magnetic powder consisting primarily of Fe<SUB>16</SUB>N<SUB>2 </SUB>phase includes a step of, at the time of producing an iron nitride magnetic powder consisting primarily of Fe<SUB>16</SUB>N<SUB>2 </SUB>phase by subjecting a reduced powder obtained by reduction of iron oxide to ammonia treatment, using goethite containing Al in solid solution as the iron oxide.
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申请公布号 |
US7332220(B2) |
申请公布日期 |
2008.02.19 |
申请号 |
US20050064939 |
申请日期 |
2005.02.25 |
申请人 |
DOWA MINING CO., LTD. |
发明人 |
MASADA KENJI;AMINO TAKAFUMI;NAGATOMI AKIRA |
分类号 |
B32B5/16;G11B5/706;C01B21/06;H01F1/04;H01F1/047;H01F1/06;H01F1/20 |
主分类号 |
B32B5/16 |
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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