Invention Application
- Patent Title: R-T-B BASED SINTERED MAGNET
- Patent Title (中): 基于R-T-B的烧结磁体
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Application No.: US14378428Application Date: 2013-02-13
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Publication No.: US20150235750A1Publication Date: 2015-08-20
- Inventor: Masashi Miwa , Haruna Nakajima , Ken-ichi Nishikawa , Tetsuya Hidaka , Jun Hagiwara , Chikara Ishizaka
- Applicant: TDK CORPORATION
- Applicant Address: JP Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Tokyo
- Priority: JP2012-028961 20120213; JP2012-078548 20120330
- International Application: PCT/JP2013/054064 WO 20130213
- Main IPC: H01F7/02
- IPC: H01F7/02
Abstract:
The present invention provides an R-T-B based sintered magnet including R2T14B crystal grains wherein; a grain boundary is formed by two or more adjacent R2T14B crystal grains, an R—O—C concentrated part, in which concentrations of R, O and C are higher than those in the R2T14B crystal grains respectively, is in the grain boundary, and a ratio (O/R) of O atom to R atom in the R—O—C concentrated part satisfies the following formula (1): 0.4
Public/Granted literature
- US09773599B2 R-T-B based sintered magnet Public/Granted day:2017-09-26
Information query
