摘要
球形羰基铁粉颗粒经铁酸镁(MgFe2O4)绝缘包覆后,与改性环氧有机硅树脂(ESR)均匀混合,通过压制成型和退火处理制得软磁复合材料。TEM、SEM、EDS、XRD和XPS分析结果表明,MgFe2O4层包覆在铁粉颗粒表面。采用振动样品磁强计和磁性材料自动测试系统对样品进行磁性能测试。经800 MPa压制和550℃退火处理后软磁复合材料在100 kHz和50 mT时的磁芯损耗为167.5 W/kg。
Spherical carbonyl iron(Fe)powders were coated with magnesioferrite(MgFe2O4)insulating coating layer and then mixed with epoxy-modified silicone resin(ESR).Soft magnetic composites(SMCs)were fabricated by compaction of the coated powders and annealing treatment.Transmission electron microscopy(TEM),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),X-ray diffractometry(XRD)and X-ray photoelectron spectroscopy(XPS)revealed that the MgFe2O4 layer was coated on the surface of the iron powders.The magnetic properties of SMCs were determined using a vibrating sample magnetometer and an auto testing system for magnetic materials.The results showed that the SMCs prepared at 800 MPa and 550℃ exhibited a significant core loss of 167.5 W/kg at 100 kHz and 50 mT.
作者
李石庚
刘如铁
熊翔
Shi-geng LI;Ru-tie LIU;Xiang XIONG(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Department of Materials and Chemistry Engineering,Pingxiang University,Pingxiang 337000,China)
基金
Project(2016YFB0700302)supported by the National Key Research and Development Program of China
Projects(51862030,51563020)supported by the National Natural Science Foundation of China。
关键词
软磁复合材料
原位氧化制备
铁酸镁绝缘涂层
退火处理
磁性能
soft magnetic composites
in-situ oxidation preparation
magnesioferrite insulating coating layer
annealing treatment
magnetic properties
