Invention Grant
- Patent Title: Method for producing a high-performance neodymium—iron—boron rare earth permanent magnetic material
- Patent Title (中): 高性能钕铁硼稀土永磁材料的制造方法
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Application No.: US14049849Application Date: 2013-10-09
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Publication No.: US09427804B2Publication Date: 2016-08-30
- Inventor: Haotian Sun
- Applicant: China North Magnetic & Electronic Technology Co., LTD
- Applicant Address: CN Shenyang, Liaoning
- Assignee: China North Magnetic & Electronic Technology Co., LTD
- Current Assignee: China North Magnetic & Electronic Technology Co., LTD
- Current Assignee Address: CN Shenyang, Liaoning
- Priority: CN201310160441 20130505
- Main IPC: B22F3/087
- IPC: B22F3/087 ; B22F3/10 ; B22F9/04 ; C22C1/10 ; H01F1/057 ; B22F1/00 ; B22F9/02

Abstract:
In the method for producing a high-performance neodymium-iron-boron rare earth permanent magnetic material of the present invention, the degree of alignment of the magnet can be improved by preparing the pre-sintered alloy material, the particle size of the powder ground by the jet mill can be refined and the fine powder in the filter of the jet mill can be mixed with the powder collected by the cyclone collector by controlling the oxygen content of the jet mill and adding the nanoscale oxide fine powder. The present invention can significantly improve the utilization ratio of the material and the performance of the magnet, save the use of the rare earth, and especially the heavy rare earth, thereby protecting the scare resources.
Public/Granted literature
- US20140328711A1 Method for producing a high-performance neodymium-iron-boron rare earth permanent magnetic material Public/Granted day:2014-11-06
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