粘结NdFeB磁体制备工艺因素的研究  

A study on the processing of bonded NdFeB magnets

作　　者：何红英[1] 张敏刚[1] 闫晓燕[1] 

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024

出　　处：《材料研究与应用》2009年第2期89-92,共4页Materials Research and Application

基　　金：山西省高校科技研究开发项目(200757);太原市科技明星专项(070204024)

摘　　要：在不同的模压压力下将MQ和SQP-A+两种磁粉分别制备成粘结磁体,并对其磁性能进行分析.研究表明,压力增大可以增加磁体的密度,提高磁性能.但压力过大,会引起磁性能的显著恶化.用MQ粉制备的磁体的性能显著高于用SQP-A+粉;MQ粉制备的大直径磁体的磁性能低于小直径磁体;在添加剂加入后充分搅拌可提高磁粉包覆均匀性.在模压温度为100℃、模压压力为1400 MPa的条件下,用MQ磁粉制得的最佳磁体的性能为:Br=0.719 T,Hcj=1052 kA/m,Hcb=467.5 kA/m,(BH)max=83.6 kJ/m3.The magnetic properties of magnets made of MQ p.owder and SQP-A＋ powder respectively at different molding pressure were investigated in this paper. It was found that properties of MQ magnets were significantly higher than those of SQP-A＋ , properties of MQ magnets with a big diameter were lower than that of the small one. The coating uniformity of powder can be improved by fully agitation after adding the additives. The optimally magnetic properties, obtained under 100℃ molding temperature and 1400 MPa molding pressure for MQ powder, were that Bt of 0. 719T, Hcj of 1052kA/m, Hcb of 467.5kA/m and （BH）max of 83.6 kJ/m^3.

关 键 词：粘结钕铁硼 模压压力 模压温度 磁性能 

分 类 号：TM273[一般工业技术—材料科学与工程]