异丙醇铝添加量对FeNiMo@Al_(2)O_(3)软磁复合材料微结构和磁性能的影响  

Effect of Aluminum isopropyl alcohol on microstructure and magnetic properties of FeNiMo@Al_(2)O_(3)SMCs

作　　者：周永川 李兆波[1] 熊政伟[2] 王进[2] ZHOU Yong-chuan;LI Zhao-bo;XIONG Zheng-wei;WANG Jin(Southwest Institute of Applied Magnetics,Mianyang 621010,China;Joint Laboratory for Extreme Conditions Matter Properties,School of Mathematics and Physics,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南应用磁学研究所,四川绵阳621000 [2]西南科技大学数理学院极端条件物质特性联合实验室,四川绵阳621000

出　　处：《磁性材料及器件》2023年第1期25-29,共5页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金项目(U2230119);四川省自然科学基金项目(2022NSFSC0333)。

摘　　要：采用溶胶-凝胶法在FeNiMo磁粉表面包覆一层Al_(2)O_(3)绝缘层,通过调控异丙醇铝添加量实现Al_(2)O_(3)绝缘层包覆厚度的控制。扫描电子显微镜和能谱分析表明Al_(2)O_(3)绝缘包覆层的厚度随着异丙醇铝添加量的增加而增大,当异丙醇铝添加量为5 g时,Al_(2)O_(3)绝缘包覆层表面最为均匀完整。磁性能分析表明,FeNiMo@Al_(2)O_(3)软磁复合材料的有效磁导率随着频率的增高而下降,且Al_(2)O_(3)绝缘层越厚起始磁导率越低。交流测量仪测得的损耗表明FeNiMo@Al_(2)O_(3)软磁复合材料的损耗随着绝缘包覆层的厚度增大而降低。In this work,the sol-gel method was used to coat the Al_(2)O_(3)insulation layer on the surface of FeNiMo magnetic powder,and the coating thickness of the Al_(2)O_(3)insulation layer was controlled by adjusting the amount of aluminum isopropyl alcohol.Scanning electron microscopy and energy spectrum analysis show that the thickness of the Al_(2)O_(3)insulation coating increases with the increase of aluminum isopropyl alcohol.When the addition of aluminum isopropyl alcohol is 5 g,the uniformly and completely surface of the Al_(2)O_(3)insulation coating is obtained.Magnetic analysis shows that the effective permeability of FeNiMo@Al_(2)O_(3)soft magnetic composite decreases with the increase of frequency,and the thicker the Al_(2)O_(3)insulation layer,the lower the initial permeability.The loss measured by AC measuring instrument shows that the loss of FeNiMo@Al_(2)O_(3)soft magnetic composite(FeNiMo@Al_(2)O_(3)SMCs)decreases with the increase of insulation coating thickness.

关 键 词：FeNiMo@Al_(2)O_(3)软磁复合材料 溶胶-凝胶法 异丙醇铝添加量 绝缘包覆 有效磁导率 磁损耗 

分 类 号：TM271.2[一般工业技术—材料科学与工程]