| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a dust core having a high electric resistivity and a high flux density. <P>SOLUTION: A dust core contains at least composite magnetic particles 1. The composite magnetic particles 1 includes core particles 2 mainly composed of iron, and an insulating coating layer 3 formed on the core particles 2. The insulating coating layer 3 at least has an inner layer 3a formed on the core particles 2, and an outermost layer 3b formed on the inner layer 3a, and the outermost layer 3b contains iron oxide. <P>COPYRIGHT: (C)2012,JPO&INPIT |
