公开(公告)号：US20130093552A1

公开(公告)日：2013-04-18

申请号：US13806762

申请日：2010-12-24

Applicant: Qingkai Wang ,  Yongjiang Yu ,  Ning Guo

Inventor： Qingkai Wang ,  Yongjiang Yu ,  Ning Guo

IPC: H01F1/01

CPC classification number: H01F1/01 ,  B22F2201/013 ,  B22F2998/10 ,  B22F2999/00 ,  C22C28/00 ,  C22C33/02 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0577 ,  H01F7/021 ,  H01F41/0273 ,  B22F9/04 ,  B22F2009/044 ,  B22F3/02 ,  B22F3/10 ,  B22F2202/05

Abstract: A neodymium-iron-boron (NdFeB) magnet having gradient coercive force and its preparation method are disclosed. The NdFeB magnet includes at least two NdFeB material layers having different coercive force, including an exterior layer having high coercive force and at least a medial layer having low coercive force. The exterior layer is connected to the medial layer via a sintered layer along an orientation direction. The NdFeB magnet has high magnetic properties and high resistance to magnetism loss.

Abstract translation: 公开了一种具有梯度矫顽力的钕铁硼（NdFeB）磁体及其制备方法。 NdFeB磁体包括具有不同矫顽力的至少两个NdFeB材料层，包括具有高矫顽力的外层和至少具有低矫顽力的中间层。 外层通过沿着取向方向的烧结层连接到中间层。 NdFeB磁体具有高的磁性能和高的磁损耗。