超高矫顽力NdFeB磁体研究  

Research on NdFeB Magnet with Super High Coercivity

作　　者：唐杰[1] 魏成富[1] 赵导文 林红[3] 邓盛贤 

机构地区：[1]绵阳师范学院化学系,四川绵阳621000 [2]绵阳西磁磁电公司,四川绵阳621000 [3]四川嘉宏磁性材料有限公司,四川绵阳621000

出　　处：《磁性材料及器件》2009年第3期53-54,58,共3页Journal of Magnetic Materials and Devices

基　　金：四川省教育厅重点项目(07ZA044);四川省教育厅青年项目(08zb047);绵阳市科技局(07Y010)

摘　　要：为制备超高矫顽力的烧结钕铁硼磁体,设计了材料配方(PrNd)23.5Dy8.7FebalAl0.7Nb0.6Cu0.02B1.05,采用了先进的工艺技术,包括片铸、氢爆碎(HD)、高纯氮气流磨制粉、高取向度密封成型、冷等静压、高温高真空烧结等。实验结果表明,由该工艺制备的粉末平均粒度为4.5μm;磁体晶粒细小均匀,富钕相弥散分布在Nd2Fe14B主相周围。磁体的剩余磁通密度为1.12T,内禀矫顽力达到2430.2kA/m,最大磁能积达到了246.0kJ/m。To produce sintered NdFeB magnetic material with super high coercivity, the nominal composition （PrNd）23.5Dy8.7FebalAl0.7Nb0.6Cu0.02B1.05 was deviseed. Some advanced processes, including strip casting （SC）, hydren decrepitation （HD） crashing, high pure nitrogen gas jet milling, high orientation airproof moulding, high temperature and high vacuum sintering, et al, were adopted. It was shown that the average powder size is 4.5μm. Fine crystal grain is formed and the Nd2Fe14B main phase is surrounded dispersively by Nd-rich phase. Sample was prepared with remanence Br of 1.12T, intrinsic coercivity Hcj of 2430.2kA/m and maximum energy product （BH）max of 246.0kJ/m3.

关 键 词：烧结钕铁硼磁体 超高矫顽力 微观结构 磁性能 

分 类 号：TM273[一般工业技术—材料科学与工程]