Invention Grant
- Patent Title: Ferrite magnet
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Application No.: US16302704Application Date: 2017-05-19
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Publication No.: US11569013B2Publication Date: 2023-01-31
- Inventor: Junnichi Nagaoka , Hitoshi Taguchi
- Applicant: TDK CORPORATION
- Applicant Address: JP Tokyo
- Assignee: TDK CORPORATION
- Current Assignee: TDK CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JPJP2016-101518 20160520,JPJP2016-101520 20160520
- International Application: PCT/JP2017/018857 WO 20170519
- International Announcement: WO2017/200091 WO 20171123
- Main IPC: H01F1/11
- IPC: H01F1/11 ; H01F1/03 ; C01G49/00 ; C01G51/00 ; C04B35/26 ; H01F1/10 ; C04B35/626

Abstract:
This ferrite magnet has a magnetoplumbite structure and is characterized in that, when representing the composition ratios of the total of each metal element A, R, Fe and Me with expression (1) A1-xRx(Fe12-yMey)z, the Fe2+ content (m) in the ferrite magnet is greater than 0.1 mass % and less than 5.4 mass % (in expression (1), A is at least one element selected from Sr, Ba, Ca and Pb; R is at least one element selected from the rare-earth elements (including Y) and Bi, and includes at least La, and Me is Co, or Co and Zn). The invention makes it possible to achieve a ferrite magnet with increased Br.
Public/Granted literature
- US20190122792A1 FERRITE MAGNET Public/Granted day:2019-04-25
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