摘要
高磁粉装载量PPS/NdFeB注射磁体的制备是目前国内外研究的重点。成功制备出磁粉装载量90%(质量分数)左右的PPS/NdFeB粘结磁体以及可实际应用永磁元器件,应用DSC、SEM和磁化曲线测量仪等表征了注射磁体微观结构和磁性能,并分析注射温度、速度和压力等工艺参数对粘结磁体微观结构和磁性能的影响规律和机理,结果表明,当注射温度为305℃、注射速率为90%υmax、注射压力为153MPa时,粘结磁体(10mm×10mm)密度可达5.12g/cm3,磁性能可达(BH)max=47.1kJ/m3,Br=0.53T,Hci=647.3kA/m,粘结永磁元器件(外径20mm,内径18mm)24极充磁后,表面磁场强度达到145.06mT。
Currently,the preparation of high loading PPS/NdFeB injection magnet is the focus of research.In this article,PPS/NdFeB bonded magnet and permanent device in practical use with magnetic powder loading being about 90wt% were prepared successfully,tested by DSC,SEM and magnetizing curve tester in order to be characterized with microstructure and magnetic performances,and analyzed on processes parameters to the laws and reasons.The results showed that while injection temperature,velocity and pressure is respectively 305℃,90%υmax and 153MPa,bonded magnet(10mm×10mm) can obtain 5.12 g/cm3 of density,and the magnetic performances(BH)max,Br,Hci) can reach to 47.1kJ/m3,0.53T,647.3kA/m respectively.After being magnetized for 24 poles,surface magnetic field intensity of bonded permanent device(diameter Ф20mm and innerФ18mm) can achieve 145.06mT.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2011年第S4期651-654,658,共5页
Journal of Functional Materials
基金
西川省应用基础研究资助项目(2009JY0004)
关键词
注射工艺
钕铁硼粘结磁体
磁性能
工艺参数
聚苯硫醚
injection molding
bonded NdFeB magnet
magnetic properties
processing parameter
PPS
