广西师范大学学报（自然科学版）2013，Vol.31Issue(1)：26-30,5.
Co添加对Fe-Si基合金微波吸收性能影响研究
Effect of Co on Microwave Absorbing Properties.of Fe-Si Alloy
摘要
Abstract
In order to develop low-frequency effect and wide-frequency characteristic absorbing materials, CoxF80_xiSi20(Χ = 0,10,20,30 mol. %)alloy powders were prepared 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 powders were analyzed by Scanning electron microscope (SEM), X-ray diffraction (XRD) ,and the effect of the Co content on microwave absorbing properties was investigated by vector network analyzer. The results show that,Co-Fe-Si alloy powders are mainly composed of a-Fe phase. The value of the reflectivity peaks reduce with the addition of Co and the reflectivity peak frequency move to low frequency with the grain size of a-Fe increasing. Alloy obtains well low-frequency effect when the addition of Co in the alloy is 20%. The minimum reflectivity and absorbing peak 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 is 10%. The reflectivity of Co10Fe70Si20 alloy was systematically studied,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 coating thickness is 3 mm,which reaches —14. 8 GHz at 3. 7 GHz.关键词
Co-Fe-Si合金/微波吸收性能/磁导率/反射率Key words
Co-Fe-Si alloy/microwave absorbing properties/permeability/reflectivity分类
信息技术与安全科学引用本文复制引用
成丽春,胡士齐,林培豪,周怀营,潘顺康..Co添加对Fe-Si基合金微波吸收性能影响研究[J].广西师范大学学报（自然科学版）,2013,31(1):26-30,5.基金项目
国家自然科学基金资助项目(50961005) （50961005）
广西自然基金创新研究团队项目(2012GXNSFGA06002) （2012GXNSFGA06002）
