摘要
在不采用贵重金属、简化工艺的思路下,采用传统的粉末冶金法结合绝缘涂层包裹高纯度雾化铁粉的工艺制备了不同成分的P-铁氧体包覆铁粉芯软磁复合材料。研究发现,当铁氧体含量0.6 wt%、P含量0.45wt%时,材料的静态软磁性能最好,饱和磁感应强度达1.61 T,矫顽力小于159 A/m且最大磁导率接近4000。从商业化降低成本的角度考虑,以更为廉价的还原铁粉为原料制备了材料并进行了性能对比。结果表明,纯度较低且形状不规则的还原铁粉不适宜用作高性能铁粉芯软磁复合材料的原料。
P-ferrite coated iron powder cores with different content of ferrite and P were prepared by using traditional powder metallurgy method and high purity atomized iron powder particles coated with an electrically insulated layer. Experimental results show that sample with 0.6 wt% ferrite and 0.45 wt% P has the best static magnetic properties with Bs of 1.61 T, coercive force of less than 20e, and maximum permeability close to 4000. Moreover, by comparison, samples were prepared using cheaper reduced iron powder as raw material, and it is found that reduced iron powder with low purity （98.9 wt%） and irregularly shape is unsuitable for preparing high-performance soft magnetic composites.
出处
《磁性材料及器件》
CAS
北大核心
2014年第5期62-64,80,共4页
Journal of Magnetic Materials and Devices
基金
柳州市科学研究与技术开发资助项目(2013C010602)
关键词
P-铁氧体包覆铁粉芯
粉末冶金
磁性能
P-ferrite coating powder metallurgy
iron powder core
magnetic properties
