| 摘要 |
PROBLEM TO BE SOLVED: To increase the strength of an iron-based powder-compact magnetic core.SOLUTION: The Fe-based powder-compact magnetic core is formed by compacting powder of Fe particles each having an insulating layer on its surface. The insulating layer has an oxide including an element selected from a group of elements lower than Fe oxide in formation free energy. In the magnetic core, a metal or intermetallic compound which includes the element selected from the group of elements lower in formation free energy fills between the Fe particles. The method of manufacturing the Fe-based powder-compact magnetic core comprises the steps of: preparing a precursor by mixing and compacting powder of a starting raw material having Fe particles each having Fe oxide on its surface and particles each including an element selected from a group of elements lower than the Fe oxide in formation free energy, and/or a starting raw material having Fe particles each having Fe oxide on its surface, and a metal or intermetallic compound on the surface of the Fe oxide, provided that the metal or intermetallic compound includes an element selected from the group of elements lower in formation free energy; and performing a heat treatment on the precursor. |
