Title:
PERMANENT MAGNET MATERIAL AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/057051
Kind Code:
A1
Abstract:
Provided are a permanent magnet material and a preparation method therefor. The permanent magnet material comprises AB12O19, 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.
Inventors:
YANG WUGUO (CN)
SHENTU JINANG (CN)
HE ZHENYU (CN)
DING BOMING (CN)
HE JUNYI (CN)
SHENTU JINANG (CN)
HE ZHENYU (CN)
DING BOMING (CN)
HE JUNYI (CN)
Application Number:
PCT/CN2020/091462
Publication Date:
April 01, 2021
Filing Date:
May 21, 2020
Export Citation:
Assignee:
HENGDIAN GROUP DMEGC MAGNETICS CO LTD (CN)
International Classes:
C04B35/40; C04B35/64; H01F1/10; H01F41/02
Foreign References:
| CN110467452A | 2019-11-19 | |||
| CN101552069A | 2009-10-07 | |||
| CN104692785A | 2015-06-10 | |||
| CN101880155A | 2010-11-10 | |||
| CN102815934A | 2012-12-12 | |||
| CN106882962A | 2017-06-23 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
Download PDF: