| 发明名称 |
R-T-B BASED SINTERED MAGNET AND MOTOR |
| 摘要 |
The present invention provides an R-T-B based sintered magnet that inhibits the demagnetization rate at high temperature even when less or no heavy rare earth elements such as Dy, Tb and the like are used. The R-T-B based sintered magnet includes R2T14B crystal grains and two-grain boundary parts between the R2T14B crystal grains. Two-grain boundary parts formed by R—Co—Cu-M-Fe phase exist, and M is at least one selected from the group consisting of Ga, Si, Sn, Ge and Bi. |
| 申请公布号 |
US2016196904(A1) |
申请公布日期 |
2016.07.07 |
| 申请号 |
US201414909606 |
申请日期 |
2014.08.08 |
| 申请人 |
TDK CORPORATION |
发明人 |
KANADA Isao;ONO Hiroyuki;KATO Eiji;MIWA Masashi |
| 分类号 |
H01F1/055;C22C38/14;C22C38/00;C22C38/06;C22C38/02;C22C38/16;C22C38/10 |
主分类号 |
H01F1/055 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An R-T-B based sintered magnet comprising R2T14B crystal grains and two-grain boundary parts between the R2T14B crystal grains,
wherein two-grain boundary parts formed by R—Co—Cu-M-Fe phase exist, and M is at least one selected from the group consisting of Ga, Si, Sn, Ge and Bi. |
| 地址 |
Tokyo JP |
