HIGH-PERFORMANCE NEODYMIUM IRON BORON PERMANENT MAGNET MATERIAL AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2021/223436

A1

A neodymium iron boron permanent magnet material and a preparation method therefor. The neodymium iron boron permanent magnet material is prepared by an anisotropic magnet as shown in formula (Nd, Pr)x Fe(100-x-y-z)ByMz and heavy rare earth as shown in formula TbaFebAl100-a-b, and the mass ratio of the heavy rare earth to the total amount of the anisotropic magnet and the heavy rare earth is 0.1-5 wt%. On the basis of reducing the use amount of heavy rare earth elements, the neodymium iron boron permanent magnet material can ensure that the coercive force of a neodymium iron boron magnet is obviously improved while the residual magnetism of the neodymium iron boron magnet is not reduced or slightly reduced, thus greatly reducing production costs.

SHU ZETENG (CN)
ZHENG BO (CN)
GUO SHUAI (CN)
CHEN RENJIE (CN)
DING GUANGFEI (CN)
YAN ARU (CN)

PCT/CN2020/134901

November 11, 2021

December 09, 2020

Click for automatic bibliography generation  

NINGBO INST MATERIALS TECH & ENG CAS (CN)

H01F1/057; H01F41/02

CN111446055A	2020-07-24
CN109859922A	2019-06-07
CN110942877A	2020-03-31
CN107424698A	2017-12-01
JPH01251703A	1989-10-06

ZHOU, DOUJUN: "Fabrication of Low Heavy Rare-earth Sintered Nd Fe B Magnets by Dy-Fe Based Alloys Intergranular Addition", CHINESE MASTER’S THESES FULL-TEXT DATABASE, ENGINEERING SCIENCE &TECHNOLOGY II, no. 7, 15 July 2018 (2018-07-15), XP009531548, ISSN: 1674-0246

UNITALEN ATTORNEYS AT LAW (CN)

View/Download PDF      PDF Help

Previous Patent: METHOD AND DEVICE FOR DETERMINING BOUNDARY OF BULGE OF STEEL LINING OF NUCLEAR POWER STATION CONTAIN...

Next Patent: ELECTRONIC SPEED CONTROL DEVICE AND UNMANNED AERIAL VEHICLE