The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2013
Filed:
Aug. 02, 2007
Hiroyuki Mitani, Kobe, JP;
Nobuaki Akagi, Takasago, JP;
Hirofumi Houjou, Takasago, JP;
Chio Ishihara, Matsudo, JP;
Makoto Iwakiri, Matsudo, JP;
Sohei Yamada, Kosai, JP;
Yasukumi Mochimizo, Kosai, JP;
Hiroyuki Mitani, Kobe, JP;
Nobuaki Akagi, Takasago, JP;
Hirofumi Houjou, Takasago, JP;
Chio Ishihara, Matsudo, JP;
Makoto Iwakiri, Matsudo, JP;
Sohei Yamada, Kosai, JP;
Yasukumi Mochimizo, Kosai, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
An iron-based magnetic powder for dust cores has layers of phosphoric acid-based film and silicone resin film sequentially formed on the surface thereof. The phosphoric acid-based film contains at least one element selected from the group consisting of Co, Na, S, Si, and W. The iron-based powder effectively keeps insulation among iron powder particles, excels in mechanical strength even though the amount of insulating material is reduced due to achieve high-density forming, and exhibits good thermal stability necessary for electrical insulating properties even after high-temperature heat treatment.