广西师范大学学报(自然科学版) ›› 2013, Vol. 31 ›› Issue (1): 26-30.

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Co添加对Fe-Si基合金微波吸收性能影响研究

成丽春1,2, 胡士齐1, 林培豪1, 周怀营1,2, 潘顺康1   

  1. 1.桂林电子科技大学材料科学与工程学院,广西桂林541004;
    2.中南大学材料科学与工程学院,湖南长沙410083
  • 收稿日期:2012-12-11 出版日期:2013-03-20 发布日期:2018-11-26
  • 通讯作者: 周怀营(1957—),男,广西合浦人,桂林电子科技大学教授,博士。E-mail:zhy@guet.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(50961005);广西自然基金创新研究团队项目(2012GXNSFGA06002)

Effect of Co on Microwave Absorbing Properties of Fe-Si Alloy

CHENG Li-chun1,2, HU Shi-qi1, LIN Pei-hao1, ZHOU Huai-ying1,2, PAN Shun-kang1   

  1. 1.School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin Guangxi 541004,China;
    2.School of Materials Science and Engineering,CentralSouth University, Changsha Hunan 410083,China
  • Received:2012-12-11 Online:2013-03-20 Published:2018-11-26

摘要: 为研制低频效应和宽频特性较好的吸波材料,以高纯块状Co、Fe、Si为原料,采用电弧熔炼和高能球磨工艺制备CoxFe80-xSi20(x=0,10,20,30)合金粉体,使用SEM、XRD和矢量网络分析仪等测试手段,研究了合金粉体形貌、结构及Co添加对合金吸波性能的影响。结果表明:制备的合金粉体主要由α-Fe相组成;Co的添加使Co-Fe-Si合金的反射率峰值变小,并随α-Fe晶粒尺寸增大而向低频移动;在涂层厚度为1.8 mm的条件下,x=20的合金吸收峰频率和峰值分别为4.8 GHz和-13.4 dB,低频效应较好,x=10的合金吸波峰频率和峰值分别为6.2 GHz和-14.8 dB,低于-5 dB的吸波带宽达14 GHz,具有良好的吸波宽频效应。系统研究了Co10Fe70Si20合金的反射率随涂层厚度变化的规律,结果表明随着涂层厚度的增加,合金的反射率峰值向低频移动,当涂层厚度为3 mm时,反射率峰值达到极值,即在3.7 GHz处达到-14.8 dB。

关键词: Co-Fe-Si合金, 微波吸收性能, 磁导率, 反射率

Abstract: In order to develop low-frequency effect and wide-frequency characteristic absorbing materials,CoxFe80-xSi20(x=0,10,20,30 mol.%)alloy powders wereprepared by arc melting and high energy ball milling technique with high pure Co、Fe and Si as raw materials.The morphology and phase structure of the powderswere analyzed by Scanning electron microscope(SEM),X-ray diffraction (XRD),andthe effect of the Co content on microwave absorbing properties was investigatedby vector network analyzer.The results show that,Co-Fe-Si alloy powders are mainly composed of α-Fe phase.The value of the reflectivity peaks reduce with the addition of Co and the reflectivity peak frequency move to low frequency withthe grain size of α-Fe increasing.Alloy obtains well low-frequency effect when the addition of Co in the alloy is 20%.The minimum reflectivity and absorbingpeak frequency is -13.4 dB at 4.8 GHz,while the minimum reflectivity and absorbing peak frequency is -14.8 dB at 6.2 GHz,furthermore the bandwidth under -5 dB reach 14 GHz,achieving well wide-frequency effect,when the content of Co is10%.The reflectivity of Co10Fe70Si20 alloy was systematicallystudied,the result shows that the reflectivity peak frequency moves to low frequency with the increasing of material thickness.The reflectivity peak is least when the coatingthickness is 3 mm,which reaches -14.8 GHz at 3.7 GHz.

Key words: Co-Fe-Si alloy, microwave absorbing properties, permeability, reflectivity

中图分类号: 

  • TM25
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