Invention Grant
- Patent Title: Rare earth magnet
- Patent Title (中): 稀土磁铁
-
Application No.: US12666909Application Date: 2008-06-27
-
Publication No.: US08152936B2Publication Date: 2012-04-10
- Inventor: Taeko Tsubokura , Makoto Iwasaki , Makoto Nakane , Fumitaka Baba
- Applicant: Taeko Tsubokura , Makoto Iwasaki , Makoto Nakane , Fumitaka Baba
- Applicant Address: JP Chuo-ku, Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Chuo-ku, Tokyo
- Agency: Drinker Biddle & Reath LLP
- Priority: JP2007-172789 20070629
- International Application: PCT/JP2008/061704 WO 20080627
- International Announcement: WO2009/004994 WO 20090108
- Main IPC: H01F1/057
- IPC: H01F1/057

Abstract:
There is provided a rare earth magnet with excellent Br and HcJ values. The rare earth magnet according to a preferred embodiment of the invention is characterized by being composed mainly of R (where R is at least one element selected from among rare earth elements including Y), B, Al, Cu, Zr, Co, O, C and Fe, wherein the content of each element is R: 25-34 wt %, B: 0.85-0.98 wt %, Al: 0.03-0.3 wt %, Cu: 0.01-0.15 wt %, Zr: 0.03-0.25 wt %, Co: ≦3 wt % (but not 0 wt %), O: ≦0.2 wt %, C: 0.03-0.15 wt % and Fe: remainder.
Public/Granted literature
- US20100233016A1 RARE EARTH MAGNET Public/Granted day:2010-09-16
Information query
IPC分类: