硅烷偶联剂表面处理后FeSiAl微米片的电磁和微波吸收特性研究  

Electromagnetic and microwave absorption properties of surface modified FeSiAl micron-flakes with silane coupling agent

作　　者：张永搏 唐丽云[1] 徐飞[1] 位建强[1] 乔亮[1] 王涛[1] 

机构地区：[1]兰州大学磁学与磁性材料教育部重点实验室应用磁学研究所,兰州730000

出　　处：《功能材料》2014年第10期58-62,共5页Journal of Functional Materials

基　　金：中央高校基本科研业务费专项资金资助项目(lzujbky-2013-22);国家自然科学基金资助项目(11144008)

摘　　要：FeSiAl 不规则颗粒在酒精溶剂中球磨，制备得到直径为10μm左右厚度为1μm左右的FeSiAl微米片，然后用硅烷偶联剂对微米片表面进行包裹处理。用电子显微镜和 X 射线光谱仪对包裹和未包裹样品做形貌观测和元素分析，并将样品制备成45%（体积分数）的石蜡复合材料，通过矢量网络分析仪测试其在0.1-18 GHz范围内的电磁参数，发现包裹和未包裹样品的复数磁导率曲线基本重合，但包裹后样品的复数介电常数有很明显的下降。微波传输理论计算表明，包裹后样品在L-S波段具有更优越吸波性能。The irregular FeSiAl particle was used as a raw material for ball milling with alcohol solvent to pro-duce micron-flakes of the diameter and thickness was about 10 μm and 1 μm,and then used silane coupling agent to package the flakes surface.The morphology and the element content of the packaged sample were in-vestigated with SEM and XPS.The frequency-dependent complex permeability of paraffin composites with 45%volume concentration of flakes was measured using the coaxial line method in 0.1-18 GHz frequency range.Af-ter surface modification the complex permittivity of the packaged composite decreased dramatically in the 0.1-5 GHz frequency range,but the permeability wasn’t found obvious change.The calculated microwave re-flectivities indicated that packaged sample had better absorbing performance than unpackaged sample in L-S fre-quency band.

关 键 词：FeSiAl微米片 表面修饰 微波吸收 硅烷偶联剂 

分 类 号：TM25[一般工业技术—材料科学与工程] TM272[电气工程—电工理论与新技术]