Title:
NEODYMIUM-IRON-BORON PERMANENT MAGNET MATERIAL, RAW MATERIAL COMPOSITION THEREOF, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/238783
Kind Code:
A1
Abstract:
Disclosed are a neodymium-iron-boron permanent magnet material, a raw material composition thereof, and a preparation method therefor. The raw material composition for preparing the neodymium-iron-boron permanent magnet material comprises the following components: 0.25-0.5 mas% of Nb; and 0.55-0.8 mas% of Cu. The neodymium-iron-boron permanent magnet material prepared by the raw material composition has a square degree of 99% or more, an Hcj temperature coefficient absolute value of 0.422% or less at 20-150ºC, and a heat treatment temperature zone of 470-510ºC, with Br ≥ 14 kGs and a coercive force ≥ 25 kOe.
Inventors:
LAN QIN (CN)
HUANG JIAYING (CN)
MOU WEIGUO (CN)
HUANG JIAYING (CN)
MOU WEIGUO (CN)
Application Number:
PCT/CN2021/095068
Publication Date:
December 02, 2021
Filing Date:
May 21, 2021
Export Citation:
Assignee:
XIAMEN TUNGSTEN CO LTD (CN)
FUJIAN CHANGTING GOLDEN DRAGON RARE EARTH CO LTD (CN)
FUJIAN CHANGTING GOLDEN DRAGON RARE EARTH CO LTD (CN)
International Classes:
H01F1/057; C22C33/02; C22C38/00; H01F1/08; H01F41/02
Foreign References:
| CN110853855A | 2020-02-28 | |||
| CN111081443A | 2020-04-28 | |||
| CN111599562A | 2020-08-28 | |||
| CN110993234A | 2020-04-10 | |||
| CN107610858A | 2018-01-19 | |||
| US20120169170A1 | 2012-07-05 |
Attorney, Agent or Firm:
SHANGHAI JOINT-WIN LAW FIRM (CN)
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