偶联剂种类和用量对铁氧体注塑磁体性能的影响  

Effect of coupling agent type and dosageon the performance of ferrite injection magnets

作　　者：熊君 孙威 张鹏杰 马斌 缪冰锋[3] 阚绪材 XIONG Jun;SUN Wei;ZHANG Pengjie;MA Bin;MIAO Bingfeng;KAN Xucai;无(BGRIMM Technology Group Co.Ltd.,Beijing 102600,China;BGRIMM Magnetic Materials and Technology(Fuyang)Co.Ltd.,Fuyang 236000,Anhui,China;School of Physics,Nanjing University,Nanjing 210008,China;School of Materials Science and Engineering,Anhui University,Hefei 230039,China;National Engineering Research Center for Magnetic Materials,Beijing 102600,China)

机构地区：[1]矿冶科技集团有限公司,北京102600 [2]北矿磁材(阜阳)有限公司,安徽阜阳236000 [3]南京大学物理学院,南京210008 [4]安徽大学材料科学与工程学院,合肥230039 [5]国家磁性材料工程技术研究中心,北京102600

出　　处：《矿冶》2024年第2期280-283,共4页Mining And Metallurgy

基　　金：国家重点研发计划项目(2021YFB3502400)。

摘　　要：首先在配料混合阶段对磁粉分别添加硅烷和钛酸酯偶联剂进行表面处理,然后采用挤出造粒法得到塑磁颗粒,再通过注射成型制备铁氧体塑磁产品,重点研究了偶联剂的种类和添加量对注塑磁体性能的影响。结果表明,三种硅烷偶联剂制备得到注塑铁氧体的磁性能都较高,KH-792(N-β-(氨乙基)-γ氨丙基三甲氧基硅烷)作偶联剂制得注塑磁体的力学性能最好,而钛酸酯作偶联剂制得塑磁颗粒的流动性较低,注射成型过程中取向变差,注塑磁体的磁性能较低。对铁氧体磁粉使用KH-792进行表面处理,偶联剂添加量质量分数优选为1.0%。磁粉经过表面处理后再制得塑磁颗粒的流动性能较未处理的显著提高。Firstly,silane and titanate coupling agents were added to the magnetic powder for surface treatment in the ingredient mixing stagte,then the extrusion granulation method was used to obtain plastic magnetic particles.Thereafter,the ferrite plastic magnetic products were prepared by injection molding.a focus on studying the effects of the type and amount of coupling agents on the performance of the injection molded magnet.The results show that the magnetic properties of injection molded ferrite prepared with the three silane coupling agents are all high.The mechanical properties of injection molded magnets made with the coupling agents KH-792(N-β-(Aminoethyl)-γaminopropyltrimethoxysilane) are the best,while the flowability of plastic magnetic particles made with titanate as the coupling agent is lower.During the injection molding process,the orientation becomes worse,and the magnetic properties of the injection molded magnets are lower.The surface treatment of ferrite magnetic powder is carried out using KH-792,and the optimal mass fraction of coupling agent addition is 1.0%.The flow performance of plastic magnetic particles produced after surface treatment of magnetic powder is significantly improved compared to the untreated ones.

关 键 词：偶联剂 表面改性 铁氧体 注塑磁体 磁体性能 

分 类 号：TM273[一般工业技术—材料科学与工程]