磁温度补偿合金对永磁体补偿效果的表征  

Characterization of Temperature Stability of Permanent Magnet with Magnetic Temperature Compensation Alloy

作　　者：李平[1] 敖晖[1] 何新波[1] 曲选辉[1] 

机构地区：[1]北京科技大学材料科学与工程学院新金属材料国家重点实验室,北京100083

出　　处：《稀有金属》2005年第5期717-720,共4页Chinese Journal of Rare Metals

基　　金：高等学校博士学科点专项科研基金资助项目(20040008015);国家973计划资助项目(TG2000067203)

摘　　要：采用外补偿法改善Nd-Fe-B永磁材料的磁性能温度稳定性.讨论了磁温度补偿合金与永磁体组合后的磁性能和温度稳定性的表征.研究表明: 用组合磁体的最大磁能积可以表征其磁性能, 用开路法测试的可逆磁通温度系数可表征组合磁体的磁性能温度稳定性.用本实验室开发的磁温度补偿合金得到的组合磁体的可逆磁通温度系数小于0.001%/℃(20～100 ℃), 室温下的最大磁能级达到195 kJ·m-3.外补偿法不仅能够有效地改善Nd-Fe-B永磁材料的磁性能温度稳定性, 而且能够保持较高的磁性能.The temperature stability of the magnetic performance of Nd-Fe-B magnet was improved by external compensation method. Characterization of temperature stability of permanent magnet with magnetic temperature compensation alloy was discussed. The results show that the magnetic performance of the combination magnet can be characterized by the maximum magnetic energy product. The temperature stability of the magnetic performances of the combination magnet can be characterized by the reversible magnetic flux temperature coefficient by open-circuit method measurement. Reversible magnetic flux temperature coefficient of the combination magnet with the compensation alloy prepared in our lab is less 0.01%/℃ （20-100℃） and its maximum magnetic energy product is 195 kJ·m^-3. It is concluded that the temperature stability of the magnetic performances of Nd-Fe-B magnet could be improved by external compensation method, which shows little influence on the magnetic performance of the magnet.

关 键 词：磁温度补偿合金 磁性能 外补偿法 永磁体 低温度系数 

分 类 号：TM273[一般工业技术—材料科学与工程]