| 发明名称 |
R-T-B BASED SINTERED MAGNET |
| 摘要 |
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<(O/R)<0.7. |
| 申请公布号 |
US2015235750(A1) |
申请公布日期 |
2015.08.20 |
| 申请号 |
US201314378428 |
申请日期 |
2013.02.13 |
| 申请人 |
TDK CORPORATION |
发明人 |
Miwa Masashi;Nakajima Haruna;Nishikawa Ken-ichi;Hidaka Tetsuya;Hagiwara Jun;Ishizaka Chikara |
| 分类号 |
H01F7/02 |
主分类号 |
H01F7/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An R-T-B based sintered magnet comprising 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 is within a range of 0.41 or more to 0.70 or less. |
| 地址 |
Tokyo JP |
