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.
作者
周永川
李兆波
熊政伟
王进
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)
出处
《磁性材料及器件》
CAS
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)。
