NDFEB MAGNET, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF

A NdFeB magnet, a preparation method and an application thereof. The NdFeB magnet is represented by a chemical formula R1-R2-Fe-M-B, and has a composite structure of a high-coercivity region and a high-remanence region, wherein R1 is a rare earth element comprising at least Nd, R2 is a heavy rare ea...

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Bibliographic Details
Main Authors SHI, Bingqiang, SU, Yunting, LIU, Lei, MA, Dan
Format Patent
LanguageEnglish
French
German
Published 06.12.2023
Subjects
ALLOYS
BASIC ELECTRIC ELEMENTS
CHEMISTRY
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
INDUCTANCES
MAGNETS
METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:A NdFeB magnet, a preparation method and an application thereof. The NdFeB magnet is represented by a chemical formula R1-R2-Fe-M-B, and has a composite structure of a high-coercivity region and a high-remanence region, wherein R1 is a rare earth element comprising at least Nd, R2 is a heavy rare earth element comprising at least Dy and/or Tb, and M is a transition metal element comprising at least Co. The neodymium-iron-boron magnet can greatly improve resistance to high-temperature demagnetization and inhibit reduction of magnetic flux of a magnet by adopting a small amount of Dy/Tb. The magnet can be useful in an embedded high-speed motor. The preparing method for the magnet can further greatly improve the material utilization and the production efficiency, and is feasible for a large-scale production.
Bibliography:Application Number: EP20210814433