Fe_(50)Ni_(50)/甲基丙烯酸甲酯复合物的电磁参数与吸波特性  

Electromagnetic parameters and microwave absorption of Fe_(50)Ni_(50)/methyl-methacrylate composites

作　　者：唐丽云[1] 池啸[1] 位建强[1] 王博翀[1] 王涛[1] 李发伸[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,甘肃兰州730000

出　　处：《磁性材料及器件》2013年第6期10-12,40,共4页Journal of Magnetic Materials and Devices

基　　金：国家重点基础研究发展计划资助项目(2012CB933101);国家自然科学基金资助项目(11144008;11204115)

摘　　要：用高能球磨制备Fe50Ni50片状颗粒,然后用化学方法对Fe50Ni50表面进行甲基丙烯酸甲酯包覆,并把多余的有机物作为黏合剂制备环形样品。分别用扫描电子显微镜和X射线衍射仪对样品形貌和结构进行分析;用热重分析仪和振动样品磁强计确定复合物的Fe50Ni50质量分数;用矢量网络分析仪测量样品的高频电磁参数。结果表明,具有平面各向异性的Fe50Ni50能显著提高起始磁导率和自然共振频率的乘积,并能突破Snoek极限。另外,对复合物高频吸波性能的计算表明,在S波段得到了复合物的最佳吸波参数,其中最佳匹配厚度为4.3 mm,最佳吸波频率为2.2 GHz,吸收峰强为-56 dB。The high energy ball mill technique and chemical method were used to prepare Fe50Ni50coated with methyl methacrylate and the superfluous organics was used as adhesive to prepare ring sample. The morphology and crystal structure was characterized using scanning electron microscope and X-ray diffractometer; the content of Fe50Ni50in the composite was confirmed by thermal gravimetric analyzer and vibrating sample magnetometer; the high frequency electromagnetic properties of composite were measured using vector network analyzer. The results showed that the product of initial permeability and nature resonance frequency of Fe50Ni50composite can be significantly improved and break Snoek limit. In addition, a minimum RL value of-56 dB was observed at 2.2 GHz on the specimen with marching thickness of 4.3 mm.

关 键 词：Fe50Ni50 甲基丙烯酸甲酯复合物 电磁参数 吸波性能 

分 类 号：TM25[一般工业技术—材料科学与工程]