FeSiAl/Fe3O4复合磁粉的制备工艺及性能研究  

Study on Preparation Process and Properties of FeSiAl/Fe3O4 Composite Magnetic Powder

作　　者：刘欢 何玉定[1] LIU Huan;HE Yuding(School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《热加工工艺》2020年第6期81-84,共4页Hot Working Technology

基　　金：广东省省级科技计划项目(2017B090901035,2016B090918052,2015B010127003);广州市科技计划项目(201704030012,201704030015)。

摘　　要：采用化学共沉淀法制备了Fe3O4包覆的FeSiAl复合磁粉。在复合磁粉中添加2%的环氧树脂及1%的硬脂酸镁,并在1800 MPa压力下冷压成环形样品,然后在923 K氮气氛围下退火1 h。探讨了质量比(Fe3O4/FeSiAl=0、0.08、0.12、0.16、0.2)对复合磁粉及其磁粉芯性能的影响。用XRD分析了复合磁粉的相结构,用振动样品磁强计测量粉末的饱和磁化强度;利用精密磁性元件分析仪测量磁粉芯的磁导率和品质因数。结果表明:随着质量比的增加,磁粉芯的饱和磁化强度和磁导将逐渐降低,品质因数先增加后降低(测试频率为1000 kHz)。当质量比为0.12时,品质因数达到最大值63,有效磁导率为83,饱和磁化强度为108.6 emu/g。The Fe3O4 coated FeSiAl composite magnetic powder was prepared by chemical coprecipitation method.After adding 2% epoxy resin and 1% magnesium stearate to the composite magnetic powder,the ring sample was prepared by cold pressing under 1800 MPa pressure,then the samples were annealed at 923 K for 1 h under nitrogen atmosphere.The effect of the mass ratio(Fe3O4/FeSiAl=0,0.08,0.12,0.16,0.2)on the properties of the composite magnetic powder and magnetic powder cores was investigated.The phase structure of the composite magnetic powder was analyzed by XRD,the saturation magnetization of the powder was measured by vibrating sample magnetometer,and the permeability and quality factor of the magnetic powder cores were measured by the precision magnetic element analyzer.The results show that,the saturation magnetization and permeability of the magnetic powder core gradually decrease with the increase of mass ratio,the quality factor of magnetic powder core increases first and then decreases under the condition of 1000 kHz.When the mass ratio is 0.12,the maximum quality factor is 63,the effective permeability is 83,and the saturation magnetization is 108.6 emu/g.

关 键 词：化学共沉淀 FeSiAl合金 磁粉芯 FE3O4 品质因数 

分 类 号：TB333.11[一般工业技术—材料科学与工程]