NdFeB磁粉对粘结NdFeB/锶铁氧体复合磁体性能的影响  

Effects of NdFeB powder on the magnetic properties of bonded NdFeB/Sr-ferrite hybrid magnets

作　　者：钟喜春[1] 黄有林[1] 刘云鹤[1] 刘仲武[1] 曾德长[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《电子元件与材料》2012年第10期41-44,共4页Electronic Components And Materials

基　　金：广东省教育部产学研结合项目资助(No.2010A090200042;No.2009B090300273);国家自然科学基金资助项目(No.U0734001;No.50874050);中央高校基本科研业务费专项资金资助项目(No.2012ZZ0013;No.2011ZM0014)

摘　　要：采用流动温压成型技术制备了各向同性粘结NdFeB/锶铁氧体复合磁体。研究了不同类型NdFeB磁粉对粘结NdFeB/锶铁氧体复合磁体磁性能和交换耦合作用的影响。结果表明,粘结贫稀土NdFeB/锶铁氧体复合磁体的综合磁性能最好,当NdFeB和铁氧体的质量比为3:2时,其磁性能Br=0.38 T,Hcj=524 kA/m,(BH)max=21.9 kJ/m3;另外,其Henkel曲线为典型的S型曲线。粘结纳米双相NdFeB/锶铁氧体复合磁体内的交换耦合作用近乎消失,磁体内以静磁交互作用为主。Isotropic bonded NdFeB/Sr-ferrite hybrid maghets were synthesized by using the warm flow compaction （WFC） technique. The effects of different types of NdFeB powder on the magnetic properties of and the exchange-coupling interaction in the bonded NdFeB/Sr-ferrite hybrid magnets were studied. The results show that the magnet made with the lean rare earth NdFeB powder shows the best performance; its Henkel plot is a typical Srcurve, and its Br, Hcj and （Bn）max are 0.38 T, 524 kA/m and 21.9 kJ/m^3 respectively when the mass ratio of NdFeB to ferrite is 3：2. In the magnet made with the nano-duplex NdFeB powder, there is almost no exchange-coupling interaction found and the magnetic interaction is mainly the magnetostatic interaction.

关 键 词：粘结复合磁体 磁性能 Henkel曲线 矫顽力温度系数 

分 类 号：TM273[一般工业技术—材料科学与工程]