层状硅酸镁铝绝缘包覆剂对铁硅磁粉心性能的影响  

The influence of magnesium aluminum silicate coating insulating agents on the properties of iron-silicon alloy magnetic powder cores

作　　者：李文超 刘国忠 张公平 檀杰[1] 申星梅[2] 郑翠红[1] LI Wenchao;LIU Guozhong;ZHANG Gongping;TAN Jie;SHEN Xinmei;ZHENG Cuihong(School of Materials Science and Engineering, Auhui University of Technology, Ma'anshan 243002, China;Key Laboratory of Metallurgical Emission Reduction & Resources Recycling,Ministry of Education, Anhui University of Technology, Ma'anshan 243002, China)

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [2]安徽工业大学冶金减排与资源综合利用教育部重点实验室,安徽马鞍山243002

出　　处：《功能材料》2020年第11期11194-11199,共6页Journal of Functional Materials

基　　金：冶金减排与资源综合利用教育部重点实验室开放基金资助项目(JKF18-05)。

摘　　要：尝试采用新颖的层状硅酸镁铝为包覆剂,对气雾化铁硅合金磁粉芯进行绝缘包覆,采用扫描电镜和磁性能测试等技术,研究了包覆剂对磁粉表面形貌以及磁粉心磁学性能的影响。结果表明,与常用的磷酸二氢铝的包覆剂相比,采用新颖的硅酸镁铝包覆的铁硅合金磁粉包覆层更加均匀、致密,无析晶现象;在1~1000kHz频率范围内,二者包覆的磁粉心有效磁导率都有良好的频率稳定性,但硅酸镁铝包覆的磁粉心直流叠加特性、品质因素和功率损耗都优于磷酸盐包覆的磁粉心。Fe-Si alloy magnetic powder cores prepared by the gas-atomization technology were coated by using a novel insulating agent of layered magnesium aluminum silicate.The effect of the coating insulating agents on surface structure and magnetic properties of the coated Fe-Si alloy magnetic powders was characterized by the technologies of scanning electron microscopy and magnetic measurements.The results show that surface coatings on the Fe-Si alloy magnetic powder using the novel coating agent of magnesium aluminum silicate were more uniform and denser without crystallization,in comparison with those using the conventional coating agent of aluminum dihydrogen phosphate.In the frequency range of 1-1000 kHz,the effective magnetic permeability of the magnetic powder cores treated by the two types of insulating agents showed good frequency stability.However,the superposition characteristics,quality factors and power loss of the magnetic powder cores coated by magnesium aluminum silicate were superior to the equivalent parameters of those by caluminumdihydrogen phosphate.

关 键 词：铁硅磁粉心 绝缘包覆 硅酸镁铝 微观形貌 磁学性能 

分 类 号：TM272[一般工业技术—材料科学与工程]