细磨及退火主要工艺参数对注射成型铁氧体磁粉物理特性的影响  

Effect of main process parameters of fine grinding and annealing on the physical characteristics of injection-molded ferrite powder

作　　者：孙威 李炳山 武彬彬[3] 张鹏杰 周超 SUN Wei;LI Bing-shan;WU Bin-bin;ZHANG Peng-jie;ZHOU Chao(BGRIMM Magnetic Materials&Technology Co,Ltd,Beijing102600,China;National Engineering Research Center for Magnetic Materials,Beijing 102600,China;Anhui Universal Benefit Holding Energy Magnetic Industry Science and Technology Co,Ltd,Fuyang 236000,China)

机构地区：[1]北矿磁材科技有限公司,北京102600 [2]国家磁性材料工程技术研究中心,北京102600 [3]安徽普惠住能磁业科技有限公司,安徽阜阳236000

出　　处：《磁性材料及器件》2021年第4期41-44,共4页Journal of Magnetic Materials and Devices

摘　　要：采用平均粒度3.5μm的粗粉,通过砂磨研磨并经过干燥制成1~2μm的干燥粉,然后对粉进行退火处理,制备成用于注射成型粘结铁氧体的磁粉。考察砂磨时间、退火温度、退火保温时间对铁氧体磁粉剩磁、内禀矫顽力、平均粒度及密度的影响。结果表明,通过优化,研磨时间在2 h、退火温度在920℃、保温时间在60 min,压坯密度达到最大3.43 g/cm^(3),剩磁达到最大182 mT。Coarse powder with average particle dimension(APD)of 3.5μm is used to form 1-2μm dry powder by sanding and drying,and then the dry powder is annealed to manufacture the powder for injection-molded ferrite.The effects of grinding time,annealing temperature and soaking time on remanence Br,intrinsic coercivity Hcj,particle size and compact density were investigated.As an optimum result,ferrite powder was prepared featuring maximum density of 3.43 g/cm^(3) and maximum remanence Br of 182 mT for milling time of 2 h and annealing of 920℃for 60 min.

关 键 词：注射成型铁氧体磁粉 剩磁 内禀矫顽力 细磨时间 退火 

分 类 号：TM277.5[一般工业技术—材料科学与工程]