HIGH-DENSITY LOW-LOSS RARE-EARTH PERMANENT MAGNETIC POWDER, HIGH-DENSITY LOW-LOSS RARE-EARTH BONDED MAGNET, AND PREPARATION METHODS THEREFOR

WIPO Patent Application WO/2023/197307

A1

The present invention provides high-density low-loss rare-earth permanent magnetic powder, a high-density low-loss rare-earth bonded magnet, and preparation methods therefor. The molecular formula of the high-density rare-earth permanent magnetic powder is SmxFe 100-x-y-zM yI z, wherein 6.0≤x≤9.5, 0≤y≤13, and 1≤z≤15.2, M is a 3d transition metal and/or a 4d transition metal, and I is an interstitial atom and comprises N, or a combination of N and H. The high-density rare-earth permanent magnetic powder has a maximum energy product of not less than 36.299 MGOe, and a compaction density of not less than 5.5 g/cm3. Compared with existing rare-earth permanent magnetic powder, the rare-earth permanent magnetic powder of the embodiments of the present invention can have better comprehensive performance, the density of the magnetic powder can be improved while the magnetic performance is further improved, and the particle size distribution of the magnetic powder can be more uniform.

CHENG BENPEI (CN)
CHEN HAIYING (CN)
LIAO SIYU (CN)
WANG XINAN (CN)

PCT/CN2022/087134

October 19, 2023

April 15, 2022

Click for automatic bibliography generation  

NINGXIA MAGVALLEY NOVEL MATERIALS TECH CO LTD (CN)

H01F1/055; H01F1/053; H01F1/059; H01F1/06; H01F41/02

CN106312077A	2017-01-11
CN111370191A	2020-07-03
CN107895620A	2018-04-10
US20210134497A1	2021-05-06

BEIJING RUN ZEHENG INTELLECTUAL PROPERTY LAW FIRM (CN)

View/Download PDF      PDF Help

Previous Patent: METHOD AND APPARATUS OF DATA TRANSMISSION

Next Patent: DRIVING METHOD FOR DISPLAY PANEL, AND DISPLAY APPARATUS