摘要
首先将FeSiCr金属粉末经0.9 wt%磷酸磷化处理,然后对其采用SiO_2进行包覆、成型及退火处理制备了FeSiCr磁粉心,研究了SiO_2包覆量对FeSiCr磁粉心电阻率、功率损耗、直流叠加特性、磁导率及其频率特性的影响。结果表明,采用SiO_2包覆会降低磁粉心的密度、磁导率与饱和磁化强度,但是可以提高电阻率与截止频率,减小功耗,改善直流叠加特性。
The FeSiCr magnetic powder cores were prepared by phosphating process,SiO2coating,pressing and annealing treatment,and the effects of SiO2coating on the electrical resistivity,power loss,DC superposition characteristic,permeability and its frequency characteristics of FeSiCr magnetic powder cores were studied.The results show that the SiO2coating can decrease the density,permeability,and the saturation magnetization,but increase the electrical resistivity,cut-off frequency,decrease power loss and improve DC-bias characteristic of the FeSiCr magnetic powder cores.
作者
张凯
王征
张义
魏荣飞
兰中文
余忠
傅膑
ZHANG Kai;WANG Zheng;ZHANG Yi;WEI Rong-fei;LAN Zhong-wen;YU Zhong;FU Bin(Ruyuan Dongyangguang Magnetics Ltd, Shaoguan 510640,China;China Aerospace Components Engineering Center, Beijing 100094, China;School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China)
出处
《磁性材料及器件》
CAS
2018年第2期52-55,共4页
Journal of Magnetic Materials and Devices
关键词
FeSiCr磁粉心
SiO2包覆
电阻率
磁导率
功率损耗
截止频率
FeSiCr magnetic powder cores
SiO2 coating
electrical resistivity
permeability
power loss
cut-off frequency
作者简介
张凯(1979—), 男,福建闽清人,毕业于电子科技大学,研究方向为磁性材料。;通讯作者:余忠E-mail: yuzhong@uestc.edu.cn
