公开(公告)号：EP4036071A1

公开(公告)日：2022-08-03

申请号：EP20869092.5

申请日：2020-05-21

申请人： Hengdian Group DMEGC Magnetics Co. Ltd.

发明人： YANG, Wuguo ,  SHENTU, Jinang ,  HE, Zhenyu ,  DING, Boming ,  HE, Junyi

IPC分类号： C04B35/40 ,  H01F1/10 ,  H01F41/02 ,  C04B35/64

摘要： Provided are a permanent magnet material and a preparation method therefor. The permanent magnet material comprises AB 12 O 19 , wherein A includes Sr, Ca and La, and B includes Fe and Co; and on the basis that the total mass of an oxide of A and an oxide of B is 100%, the mass fraction of the oxide of A is 12-18 wt%, and the mass fraction of the oxide of B is 82-88 wt%. The preparation method comprises: 1) crushing a first raw material mixture to obtain a primary crushed material; 2) pre-firing the primary crushed material to obtain a pre-fired material; 3) mixing the pre-fired material with a second raw material mixture, and crushing same to obtain a secondary crushed material; 4) subjecting the secondary crushed material to magnetic field molding to obtain a molded body; and 5) pre-heating and sintering the molded body to obtain the permanent magnet material.

公开(公告)号：EP4206160A1

公开(公告)日：2023-07-05

申请号：EP21912739.6

申请日：2021-04-25

申请人： Hengdian Group DMEGC Magnetics Co., Ltd.

发明人： YANG, Wuguo ,  HE, Zhenyu ,  SHENTU, Jinang ,  FANG, Shengxiang ,  WU, Xiangliang ,  JIN, Zhihong

IPC分类号： C04B35/40 ,  H01F7/02

摘要： Disclosed are a permanent magnet ferrite material and a preparation method therefor. The permanent magnet ferrite material comprises a main phase, and the general formula of the main phase is: A 1-x-y Ca x La y Fe 3+ 2n-z-a Fe 2+ a Co z O 19 , wherein A comprises Sr or a combination of Sr and Ba; 0.25≤x≤0.45; 0.40≤y≤0.55; 0.25≤z≤0.40; 0