摘要
采用正交试验法,利用硼氢化钠水溶液还原氯化亚铁和氟硅酸钠水溶液中的Fe和Si,制备出一种粒径为200~500 nm的球形粉末,采用X射线衍射仪、同步热分析仪、透射电子显微镜及选区电子衍射、X射线光电子能谱仪以及电感耦合等离子体光谱分析表明该粉末是成分为Fe87.6Si1.08B11.31的非晶态合金。利用矢量网络分析仪研究了该粉末的吸波性能,结果表明:该粉末在14.56 GHz处最小反射损耗为-44.8 dB,对应的匹配厚度为1.5 mm,有效带宽为6.16 GHz且为最大吸收带宽。对电磁波的损耗以磁损耗为主,介电损耗为辅,其中介电损耗以偶极极化为主,磁损耗以涡流损耗和自然共振为主。
A spherical powder with particle size of 200-500 nm was prepared by orthogonal test using sodium borohydride to reduce Fe and Si in aqueous solutions from ferrous chloride and sodium fluosilicate aqueous solutions.Characterizations using X-ray diffraction(XRD),simultaneous thermal analyzer(STA),X-ray photoelectron spectroscopy(XPS),and inductively coupled plasma(ICP)spectroscopy reveal the powder to be an amorphous alloy composed of Fe 87.6 Si 1.08 B 11.31.The wave-absorbing properties of the powder were studied by vector network analyzer.The results show that the powder achieves a minimum reflection loss of-44.8 dB at 14.56 GHz with a matching thickness of 1.5 mm,and the effective bandwidth of 6.16 GHz which corresponds to the maximum absorption bandwidth is obtained.The loss of electromagnetic wave is mainly magnetic loss,and the dielectric loss is supplemented,in which the dielectric loss is mainly dipole polarization,and the magnetic loss is mainly eddy current loss and natural resonance.
作者
李悦
袁子洲
张香云
LI Yue;YUAN Zizhou;ZHANG Xiangyun(State Key Laboratory of Gansu Advanced Processing and Recycling of Non-ferrous Metal,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2024年第8期141-149,165,共10页
Nonferrous Metals（Extractive Metallurgy)
基金
国家自然科学基金资助项目(52061024,52161027)
兰州理工大学红柳优秀青年人才支持计划项目。
关键词
正交试验
化学还原法
Fe-Si-B非晶合金
吸波性能
orthogonal experiment
chemical reduction method
Fe-Si-B amorphous alloy
absorbent properties
