近场通信系统用抗电磁干扰Fe基软磁材料的制备  

Preparation of Fe-based soft-magnetic materials for anti-electromagnetic interference in near-field communication system

作　　者：胡磊山 胡照文[1] 邓联文[1,2] 文瑞[1] 张雨[1] 唐璐[1] 刘胜[1] 

机构地区：[1]中南大学物理与电子学院超微结构与超快过程湖南省重点实验室,长沙410083 [2]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2015年第6期894-899,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：中南大学超微结构与超快过程湖南省重点实验室资助项目;粉末冶金国家重点实验室开放基金资助项目

摘　　要：采用熔体快淬法制备Fe Si Al快淬带料;利用行星式高能球磨工艺进行扁平化处理;使用真空管式炉进行氢还原退火处理;采用SEM、PPMS表征试样的形貌及室温磁滞回线;使用矢量网络分析仪测量试样在10~100 MHz频段的复磁导率;采用抗干扰性能测试系统测量表征磁片抗干扰的标签读写距离;研究影响Fe Si Al粉体材料磁性能的主要因素,并分析了其作用机理。结果表明,采用高低速两步法高能球磨处理,能有效提高薄片状Fe Si Al材料的径厚比;氢还原退火处理能有效提高饱和磁化强度和磁导率,降低矫顽力和磁损耗;制备的片状Fe Si Al材料在13.56 MHz频率附近具有优异的近场通信抗电磁干扰性能。FeSiAl strips were prepared by melt-spun quenching method. FeSiAl strips were further flattened by high-energy planetary ball milling. Vacuum anneal furnace was used to perform the hydrogen reduction annealing for FeSiAl powders. The morphology and hystersis loops at room temperature were characterized by the scanning electron microscope （SEM） and the physical property measurement system （PPMS） respectively. The vector network analyzer was employed to measure complex permeability of the samples within 10 to 100 MHz frequency range. The reading distance of electronic label was measured by the anti-interference test system. The main factors and related mechanism influencing the magnetic properties of FeSiAl materials were also explored. The results show that, the aspect ratio of flaky FeSiAl particles can be effectively improved by two-step ball milling method with high velocity firstly and low velocity secondly. The saturation magnetization and permeability can be effectively improved, and the coercivity and magnetic loss can be reduced by the hydrogen reduction annealing treatment. Thus, the prepared FeSiAl materials present excellent anti-electromagnetic interference capability for the near-field communication system near 13.56 MHz.

关 键 词：熔体快淬 Fe SI Al 行星式高能球磨 氢还原退火 近场通信抗电磁干扰 

分 类 号：TG132.271[一般工业技术—材料科学与工程]