一种易于回收再利用的含铌钕铁硼磁体及其制备方法
By adding Nb to NdFeB magnets and reducing other alloying elements, niobium-containing NdFeB magnets that are easy to recycle and reuse have been prepared, solving the recycling problem caused by the excessive types of alloying elements in existing NdFeB magnets and maintaining good magnetic properties and temperature stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG SHENGYUAN PERMANENT MAGNET MATERIAL CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-07-17
AI Technical Summary
Existing neodymium iron boron magnets are difficult and costly to recycle due to the large number of alloying elements, and their magnetic properties are limited after remanufacturing.
By adding an appropriate amount of Nb and reducing other alloying elements, NdFeB magnets with fewer alloying elements containing Nb are prepared. Magnetic powder is prepared by melting and rapid solidification-hydrogenation-air jet milling, hydrogenation-disproportionation-dehydrogenation-recombination or rapid quenching methods. Combined with sintering and aging treatment, NbFeB phase is formed to hinder grain growth and improve Curie temperature and coercivity.
This method enables easy recycling and reuse of the magnet, maintains good initial magnetic properties, and ensures that the remanence, coercivity, and temperature stability of the reconstituted magnet are similar to those of the original magnet, thereby improving the Curie temperature of the main phase of the magnet.