高岭土凝胶绝缘包覆对Fe-Si磁粉芯性能的影响  

Effect of Kaolin gel insulating coating agent on the performance of Fe-Si magnetic cores

作　　者：万程 许欣蓓 鲁书潮 赵利明 刘国忠 郑翠红[1] WAN Cheng;XU Xinbei;LU Shuchao;ZHAO Liming;LIU Guozhong;ZHENG Cuihong(School of Materials Science and Engineering,Anhui University of Technology,Ma'anshan 243002,China;Maanshan 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：《粉末冶金工业》2023年第6期74-80,共7页Powder Metallurgy Industry

基　　金：安徽省科技厅重点研发项目(202104a05020031)。

摘　　要：实验以剥层后的高岭土凝胶为绝缘包覆剂,对气雾化球形Fe-Si合金磁粉进行绝缘包覆,经成形热处理后得到Fe-Si磁粉芯,研究了高岭土添加量对Fe-Si磁粉芯性能的影响。研究表明,高岭土添加量从0.8%增加至1.8%时,Fe-Si磁粉芯的有效磁导率μe显著降低,由65.2下降至45.5;随着添加量的逐渐增加,其品质因数Q值呈先升高后降低趋势,而功率损耗P_(cv)与Q值呈相反趋势,1.4%高岭土添加量样品的P_(cv)达到最低,50 kHz/100 mT下为419 mW/cm~3,Q值达158.8。与传统磷化绝缘处理相比,Fe-Si磁粉芯的品质因数Q值和功率损耗P_(cv)均有显著改善。A gas atomization spherical Fe-Si alloy magnetic powder was coated by a delaminated kaolin gel to realize its surface electrical insulation, and then Fe-Si magnetic powder core was prepared by the processes of powder forming and following heat treatment. The effect of the amount of kaolin insulating coating agent used on performance of the obtained Fe-Si magnetic powder core were investigated. The results show that when the dosage of kaolin used increases from 0.8% to 1.8%, the effective permeability μeof the Fe-Si magnetic powder core decreases from 65.2 to 45.5;when the dosage of kaolin is gradually increased, its quality factor Q value rises first and then drops, and the power loss P_(cv)and Q value show an opposite trend. When the kaolin coating agent accounts for 1.4%, the P_(cv)reaches the minimum value of 419 mW/cm~3, and the Q value does the value of 158.8.Compared with that using traditional phosphating insulation treatment, the Fe-Si magnetic powder core in this work shows significantly improved magnetic performance in terms of quality factor Q value and power loss P_(cv).

关 键 词：Fe-Si磁粉芯 绝缘包覆 高岭土 性能 

分 类 号：TM27[一般工业技术—材料科学与工程]