公开(公告)号：US20160365181A1

公开(公告)日：2016-12-15

申请号：US15135337

申请日：2016-04-21

Applicant: TDK CORPORATION

Inventor： Kenichi SUZUKI ,  Shogo KADOTA ,  Eiichiro FUKUCHI

IPC: H01F1/03 ,  C22C38/10 ,  H02K1/02

CPC classification number: H01F1/0306 ,  C22C38/10 ,  C22C38/105 ,  H01F1/047 ,  H01F7/021 ,  H01F10/16 ,  H01F10/265 ,  H01F41/18 ,  H02K1/02

Abstract: A permanent magnet having a periodic structure with the concentrations of Fe and T (T is one or more transition metal elements with Co or Ni as necessity) changing alternately, wherein, the concentrations change with a period of 3.3 nm or less and the concentration difference of Fe in the concentration change is 5 at % or more. The permanent magnet has a high saturation magnetization Is and coercivity HcJ and can be prepared even without rare earth element(s) R.

Abstract translation: 具有Fe和T浓度的周期性结构的永磁体（T是一个或多个具有Co或Ni的过渡金属元素，根据需要）交替变化，其中，浓度随着3.3nm以下的周期而变化， 浓度变化中的Fe为5原子％以上。 永磁体具有高的饱和磁化强度Is和矫顽力HcJ，并且即使没有稀土元素也可以制备。

公开(公告)号：US20170047151A1

公开(公告)日：2017-02-16

申请号：US15304193

申请日：2015-03-10

Applicant: TDK CORPORATION

Inventor： Shogo KADOTA ,  Kenichi SUZUKI ,  Yuji UMEDA ,  Ryuji HASHIMOTO ,  Keiji TAKEDA

IPC: H01F1/057 ,  C22C38/00 ,  H01F1/055 ,  B22F3/16 ,  H01F1/058 ,  H01F1/059

CPC classification number: H01F1/057 ,  B22F3/16 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C2202/02 ,  H01F1/0556 ,  H01F1/0557 ,  H01F1/0577 ,  H01F1/058 ,  H01F1/059

Abstract: To provide a permanent magnet which uses Ce of an abundant resource and has a great magnetic anisotropy in rare earth permanent magnets. To obtain a permanent magnet having a high magnetic anisotropy due to the trivalent Ce state by setting the abundance ratio C3/(C3+C4) in the main phase grains to be 0.1≦C3/(C3+C4)≦0.5 where C3 denotes the number of trivalent Ce atoms and C4 denotes the number of tetravalent Ce atoms.

Abstract translation: 提供一种使用丰富资源的Ce并且在稀土永磁体中具有很大的磁各向异性的永磁体。 为了通过将主相晶粒中的丰度比C3 /（C3 + C4）设定为0.1≤C3/（C3 + C4）≤0.5，由于三价Ce状态而获得具有高磁各向异性的永磁体，其中C3表示 三价Ce原子数，C4表示四价Ce原子数。