公开(公告)号：EP2415057B1

公开(公告)日：2013-05-01

申请号：EP10758035.9

申请日：2010-03-26

Applicant: BYD Company Limited

Inventor： GONG, Qing ,  DU, Xin ,  CHENG, Xiaofeng

IPC: H01F1/057 ,  H01F41/02 ,  C22C38/00 ,  C22C38/10 ,  C22C1/04

CPC classification number: H01F1/0579 ,  B22F2998/10 ,  B22F2999/00 ,  B82Y25/00 ,  C22C1/0441 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F41/0266 ,  B22F1/0003 ,  B22F3/02 ,  B22F3/10 ,  B22F2003/248 ,  B22F2202/05 ,  B22F3/1007 ,  B22F2201/20 ,  B22F2201/10

公开(公告)号：EP2436016A1

公开(公告)日：2012-04-04

申请号：EP10780039.3

申请日：2010-05-17

Applicant: BYD Company Limited

Inventor： GONG, Qing ,  ZHANG, Zhiqiang ,  ZHANG, Surong ,  DU, Xin ,  CHENG, Xiaofeng

IPC: H01F1/057 ,  H01F1/08

CPC classification number: H01F1/0577 ,  B22F3/087 ,  B22F2998/10 ,  B22F2999/00 ,  H01F1/11 ,  H01F41/0266 ,  B22F1/0003 ,  B22F3/1007 ,  B22F2003/248 ,  B22F2201/20

Abstract: A permanent magnetic material comprising a Nd-Fe-B alloy and an additive including at least a cobalt ferrite, and a method for preparing the permanent magnetic material are provided. The method comprises the following steps: mixing the Nd-Fe-B alloy and the additive including at least a cobalt ferrite to obtain a mixture; magnetically orienting and pressing the mixture in a magnetic field; and sintering and tempering the mixture in vacuum or under the protection of inert gas.

Abstract translation: 提供包含Nd-Fe-B合金和至少包含钴铁氧体的添加剂的永磁材料，以及制备该永磁材料的方法。 该方法包括以下步骤：将Nd-Fe-B合金和至少包含钴铁氧体的添加剂混合以获得混合物; 在磁场中使混合物磁性定向并挤压; 并在真空下或在惰性气体保护下烧结和回火该混合物。

公开(公告)号：EP2415057A1

公开(公告)日：2012-02-08

申请号：EP10758035.9

申请日：2010-03-26

Applicant: BYD Company Limited

Inventor： GONG, Qing ,  DU, Xin ,  CHENG, Xiaofeng

IPC: H01F1/057 ,  H01F41/02

CPC classification number: H01F1/0579 ,  B22F2998/10 ,  B22F2999/00 ,  B82Y25/00 ,  C22C1/0441 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F41/0266 ,  B22F1/0003 ,  B22F3/02 ,  B22F3/10 ,  B22F2003/248 ,  B22F2202/05 ,  B22F3/1007 ,  B22F2201/20 ,  B22F2201/10

Abstract: A composite magnetic material and a method for preparing the same are provided. The composite magnetic material comprises Nd-Fe-B alloy and Fe-base soft magnetic alloy having the general formula of Fe
100-x-y-z A
x R
a Si
y B
z , wherein A is at least one element selected from Cu and Au, R is at least one element selected from the group consisting of Ti, Zr, Hf, Mo, Nb, Ta, W and V, x ranges from 0 to 3, y ranges from 0 to 20, a ranges from 0 to 10, and z ranges from 2 to 25. The magnetic energy product and the residual magnetism of the composite magnetic material are both improved.

公开(公告)号：EP2436016B1

公开(公告)日：2017-03-29

申请号：EP10780039.3

申请日：2010-05-17

Applicant: BYD Company Limited

Inventor： GONG, Qing ,  ZHANG, Zhiqiang ,  ZHANG, Surong ,  DU, Xin ,  CHENG, Xiaofeng

IPC: H01F1/057 ,  H01F1/08 ,  H01F41/02

CPC classification number: H01F1/0577 ,  B22F3/087 ,  B22F2998/10 ,  B22F2999/00 ,  H01F1/11 ,  H01F41/0266 ,  B22F1/0003 ,  B22F3/1007 ,  B22F2003/248 ,  B22F2201/20

公开(公告)号：EP2478528A1

公开(公告)日：2012-07-25

申请号：EP10816636.4

申请日：2010-07-30

Applicant: BYD Company Limited

Inventor： GONG, Qing ,  DENG, Xiaoxia ,  DU, Xin

IPC: H01F1/053

CPC classification number: H01F41/0273 ,  B22F2998/10 ,  B22F2999/00 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  H01F1/0577 ,  B22F9/08 ,  B22F9/04 ,  B22F1/0059 ,  B22F3/093 ,  B22F2003/248 ,  B22F2009/044 ,  B22F9/023

Abstract: A rare earth permanent magnetic material is provided, which is represented by the general formula of R
a-x-y Ho
x Dy
y Fe
1-a-b-c-d Co
d M
c B
b , wherein x, y, a, b, c and d are weight percentages of corresponding elements, in which 28%≤ a ≤34%, 0.95%≤ b ≤1.3%, 0≤ c ≤1.5%, 1%≤ d ≤10%, 15%≤ x ≤20% and 3%≤ y ≤8%; wherein R is a rare earth element, which is selected from the group consisting of Nd, Pr, La, Ce, Gd, Tb and combinations thereof; and wherein M is selected from the group consisting of Al, Cu, Ti, V, Cr, Zr, Hf, Nb, Sn, Mo, Ga, Si and combinations thereof. A method for preparing the rare earth permanent magnetic material is also provided.