高性能粘结钕铁硼磁体的制备  

Preparation of High Performance Bonded NdFeB Permanent Magnet

作　　者：李军[1] 刘颖[1] 高升吉[1] 涂铭旌[1] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610065

出　　处：《中国稀土学报》2004年第3期331-335,共5页Journal of the Chinese Society of Rare Earths

基　　金：国家 8 63计划资助项目 ( 2 0 0 1AA3 2 40 3 0 )

摘　　要：研究了磁选处理、偶联处理、润滑处理、预压成型以及双向压制对粘结NdFeB磁体的密度和磁性能影响规律及机制。研究表明 :磁选可分离磁粉中低矫顽力的磁粉 ;偶联处理可改善磁粉与粘结剂之间的界面 ;减少粘结剂的含量可提高磁体的磁性能 ;粒度配合可减少磁体中的孔隙 ;润滑处理可提高磁体的成型性 ;预压成型和双向压制可提高磁体的密度。采取上述工艺制备了密度为 6.5 2g·cm- 3,磁性能达到 10 9kJ·m- 3的粘结NdFeB磁体。The effect of magnetic separation, coupling treatment, lubricating treatment, pre-molding and double-side molding on bonded magnet′s density and magnetic properties was researched. The result demonstrates that magnetic separation can pick out powder with low coercive force, coupling treatment can improve the interface between powder and adhesive, decreasing adhesive content can increase magnet′s magnetic performance, granularity arrange can reduce holes in the magnet, lubricating treatment can improve magnet′s compressibility, pre-molding and double-side molding can improve magnet′s density greatly. Using these methods, the bonded NdFeB magnet, which density reaches 6.52 g·cm^(-3), (BH)_(max) reaches 109 kJ·m^(-3), may be gotten.

关 键 词：金属材料 粘结NDFEB磁体 高性能 密度 稀土 

分 类 号：TM273[一般工业技术—材料科学与工程]