| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method which can manufacture a powder magnetic core having high magnetic flux density and mechanical strength as well as low iron loss, and the powder magnetic core with high performance obtained from such manufacturing method. SOLUTION: The manufacturing method for a powder magnetic core comprises: a molding step where an iron-based soft magnetic powder for a powder compact having a phosphate chemical coating is compacted on the iron-based soft magnetic powder; and an oxidation step where the powder compact obtained at the molding step is contacted with oxygen and water having a saturated vapor pressure. COPYRIGHT: (C)2012,JPO&INPIT |
