气雾化铁硅铝磁粉粒度级配对磁粉芯性能的影响  

Effect of grading of gas atomized Fe-Si-Al powders on properties of the magnetic powder cores

作　　者：许欣蓓 鲁书潮 鲍康馨 蹇汉杰 赵利明 冒爱琴[1] 盛汝昌 郑翠红[1] XU Xin-bei;LU Shu-chao;BAO Kang-xin;JIAN Han-jie;ZHAO Li-ming;MAO Ai-qin;SHENG Ru-chang;ZHENG Cui-hong(School of Materials Science and Engineering,Anhui University of Technology,Ma'anshan 243002,China;Ma'anshan New Conda Magnetic Industrial Co,Ltd,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]马鞍山新康达磁业有限公司,安徽马鞍山243002

出　　处：《磁性材料及器件》2024年第3期47-53,共7页Journal of Magnetic Materials and Devices

基　　金：安徽省科技厅重点研究与开发计划项目(202104a05020031)。

摘　　要：采用颗粒粒径分别为75~48μm(P1),48~37.4μm(P2)和小于37.4μm(P3)的气雾化铁硅铝磁粉,按照一定质量比级配,通过磷酸/硅树脂复合绝缘工艺,制得铁硅铝复合磁粉芯,研究了粒度级配对粉芯密度及其磁性能的影响。研究表明,当粗颗粒组P1含量一定时,适当增加细颗粒组P3的含量,可以有效填充磁粉芯内粗颗粒之间的间隙,提高复合磁粉芯的密度,从而在一定程度上提高有效磁导率。适量减少P1组粗粉、增加P3细粉的含量,可以降低磁芯功率损耗,当P1:P2:P3=2:5:3时样品具有最低的功率损耗,在100mT/50kHz测试条件下为95.5mW/cm^(3)。Three types of gas atomization derived Fe-Si-Al magnetic powders,named as P1,P2 and P3,whose particle size distribution was determined to be in the range of 75-48,48-37.4 and<37.4μm,respectively,were mixed at a proper weight ratio to form a composite magnetic powder,and then the composite magnetic powder was coated by a phosphoric acid/silicone resin for realizing electrical insulation,eventuallyresulting in Fe-Si-Al composite magnetic powder cores.Effect of their weight ratio was investigated on the density and magnetic performance of the Fe-Si-Al composite magnetic powder cores.The results show that when the content of the coarse powderP1 is kept invariant,a proper increasein the content of P3 results in the increase of density,due to the gap between coarse particles in P1 being filled by fine particles in P3,and the effective permeability can be improved to a certain extent.An appropriate decrease in the P1 content,and simultaneously an increase in the P3 content can lead to the decrease of the power loss of magnetic powder cores.The obtained composite magnetic powder core with a weight ratio of the P1,P2 and P3 of 2:5:3 shows the lowest power loss,which was determined to be 95.5 mW/cm^(3) under the test conditions of 100 mT and 50 kHz.

关 键 词：铁硅铝 磁粉 磁粉芯 粒度级配 磁性能 

分 类 号：TM271[一般工业技术—材料科学与工程]