Title:
NEODYMIUM-IRON-BORON MAGNET MATERIAL, RAW MATERIAL COMPOSITION, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/169889
Kind Code:
A1
Abstract:
A neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof, the raw material composition containing the following components: R: 28-33 wt%; R being rare earth elements and comprising a rare earth metal used for smelting R1 and a rare earth metal used for grain boundary diffusion R2, the content of R2 being 0.2-1 wt%, R1 comprising Nd and not containing RH, and R2 comprising Tb; B: 0.9-1.1 wt%; Cu: 0.15 wt% or less, and not 0 wt%; M: 0.4 wt% or less and not 0 wt%, M comprising one or more elements from among Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, Zn, and Ag; Fe: 60-70.5 wt%; Co: ＜0.5 wt% and not 0 wt%; RH being a heavy rare earth element. The magnet material features the advantages of high remanence, high coercivity, and excellent high-temperature performance.
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Inventors:
LUO YING (CN)
HUANG JIAYING (CN)
LIAO ZONGBO (CN)
LAN QIN (CN)
LIN YULIN (CN)
SHI DAWEI (CN)
XIE JUHUA (CN)
LONG YANQING (CN)
HUANG JIAYING (CN)
LIAO ZONGBO (CN)
LAN QIN (CN)
LIN YULIN (CN)
SHI DAWEI (CN)
XIE JUHUA (CN)
LONG YANQING (CN)
Application Number:
PCT/CN2021/077174
Publication Date:
September 02, 2021
Filing Date:
February 22, 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; H01F41/02
Foreign References:
| CN102103916A | 2011-06-22 | |||
| CN110537235A | 2019-12-03 | |||
| CN104078176A | 2014-10-01 | |||
| CN111261355A | 2020-06-09 | |||
| CN110828089A | 2020-02-21 | |||
| JPH07122413A | 1995-05-12 |
Attorney, Agent or Firm:
SHANGHAI JOINT-WIN LAW FIRM (CN)
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