Title:
METHOD FOR PREPARING NEODYMIUM-IRON-BORON PERMANENT MAGNETIC MATERIAL
Document Type and Number:
WIPO Patent Application WO/2018/113717
Kind Code:
A1
Abstract:
Disclosed is a method for preparing a neodymium-iron-boron permanent magnetic material. The method comprises: preparing a neodymium-iron-boron magnetic material, depositing heavy rare earth particles or high melting particles on the neodymium-iron-boron magnetic powder by means of a physical vapor deposition process; and orienting, forming and then sintering same to obtain a neodymium-iron-boron magnet. By the present invention, the heavy rare earth particles or high melting particles are dispersed evenly within the magnet at the grain boundary, with coercive force of the magnet being increased and the amount of heavy rare earth used being reduced, so that the coercive force of the neodymium-iron-boron magnet is significantly increased.
Inventors:
SUN LIANGCHENG (CN)
YANG ZHANFENG (CN)
ZHANG ZHIHONG (CN)
LIU XIAOYU (CN)
LIU SHUFENG (CN)
YANG FAN (CN)
LIU JIXIANG (CN)
WANG YU (CN)
LI JINGYA (CN)
LU FEI (CN)
LOU SHUPU (CN)
LI HUI (CN)
CHEN PEIXIN (CN)
BAI YANG (CN)
CHENG YU (CN)
WANG FENG (CN)
ZHENG TIANCANG (CN)
XIA FENG (CN)
SUN CAINA (CN)
YANG ZHANFENG (CN)
ZHANG ZHIHONG (CN)
LIU XIAOYU (CN)
LIU SHUFENG (CN)
YANG FAN (CN)
LIU JIXIANG (CN)
WANG YU (CN)
LI JINGYA (CN)
LU FEI (CN)
LOU SHUPU (CN)
LI HUI (CN)
CHEN PEIXIN (CN)
BAI YANG (CN)
CHENG YU (CN)
WANG FENG (CN)
ZHENG TIANCANG (CN)
XIA FENG (CN)
SUN CAINA (CN)
Application Number:
PCT/CN2017/117641
Publication Date:
June 28, 2018
Filing Date:
December 21, 2017
Export Citation:
Assignee:
BAOTOU RES INST RARE EARTHS (CN)
NATIONAL ENGINEERING RES CENTRE OF RUIKE RARE EARTH METALLURGY AND FUNCTION MATERIALS CO LTD (CN)
BAOTOU IRON & STEEL GROUP CO LTD (CN)
XIAMEN INST OF RARE EARTH MAT (CN)
BAOTOU JINSHAN MAGNETIC MAT CO LTD (CN)
NATIONAL ENGINEERING RES CENTRE OF RUIKE RARE EARTH METALLURGY AND FUNCTION MATERIALS CO LTD (CN)
BAOTOU IRON & STEEL GROUP CO LTD (CN)
XIAMEN INST OF RARE EARTH MAT (CN)
BAOTOU JINSHAN MAGNETIC MAT CO LTD (CN)
International Classes:
H01F1/057; B22F1/17; H01F41/02
Foreign References:
| CN102280240A | 2011-12-14 | |||
| CN103456451A | 2013-12-18 | |||
| CN106847456A | 2017-06-13 | |||
| CN106881459A | 2017-06-23 | |||
| CN106847455A | 2017-06-13 | |||
| CN106783130A | 2017-05-31 | |||
| CN106783128A | 2017-05-31 | |||
| CN106783129A | 2017-05-31 | |||
| CN107424697A | 2017-12-01 | |||
| CN201611192264A | 2016-12-21 | |||
| CN201611192971A | 2016-12-21 | |||
| CN201611191110A | 2016-12-21 | |||
| CN201611192277A | 2016-12-21 | |||
| CN201611192973A | 2016-12-21 | |||
| CN201611195651A | 2016-12-21 | |||
| CN201710624106A | 2017-07-27 | |||
| CN201710624675A | 2017-07-27 |
Other References:
See also references of EP 3547333A4
Attorney, Agent or Firm:
BEIJING KANGSHENG INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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