摘要
采用高能机械球磨法制备片状FeSiCr合金吸收剂,利用X射线衍射仪、扫描电子显微镜和矢量网络分析仪分析研究球磨时间对FeSiCr合金相结构、微观形貌及环氧树脂/FeSiCr复合材料电磁性能及吸波性能的影响。研究结果表明,随着球磨时间延长,FeSiCr合金由球状变为片状,环氧树脂/FeSiCr复合材料的复介电常数和复磁导率逐渐增大。球磨时间达5 h时,获得厚片状FeSiCr合金,制备的复合材料试样厚度为1.4 mm时,在6.6~18 GHz波段反射率小于–5 dB,吸波性能优异。球磨时间延长至8 h和11 h时,获得薄片状FeSiCr合金,制备的复合材料试样厚度为2 mm时,在低频波段具有优异的吸波性能,分别在3.5 GHz和2.97 GHz达到反射率峰值–8.03 dB和–9.28 dB。通过调整球磨时间,可使环氧树脂/FeSiCr复合材料在2.6~18 GHz内不同频段实现优异的吸波性能。
Flaky FeSiCr alloy absorbent was fabricated by mechanical milling method.The effects of milling time on phase,morphology of FeSiCr alloy,electromagnetic and microwave absorbing properties of epoxy resin/FeSiCr composites were characterized by X-ray diffractometer,scanning electron microscopy and vector network analyzer.The results show that the microscopy of the FeSiCr alloy particles are changed from sphere to flaky shape,and the complex permittivity and complex permeability of epoxy resin/FeSiCr composites are increased with milling time increases.Thick flaky FeSiCr alloy is achieved after milled with 5 h,and the reflection loss(RL)below–5 dB of epoxy resin/FeSiCr composite is obtained in the high frequency range of 6.6–18 GHz at the thickness of 1.4 mm,demonstrating a good microwave absorption performance.When the milling time is extended to 8 h and 11 h,thin flaky FeSiCr alloy is reached,and the RL peak values are–8.03 dB at 3.5 GHz and–9.28 dB at 2.97 GHz for epoxy resin/FeSiCr composite at the thickness of 2.0 mm,respectively.The outstanding microwave absorbing property of epoxy resin/FeSiCr composites in the different frequency bands in 2.6~18 GHz can be fulfilled by adjustment of milling time of FeSiCr alloy.
作者
翟影
朱冬梅
罗发
南涵漪
阮兴翠
Zhai Ying;Zhu Dongmei;Luo Fa;Nan Hanyi;Ruan Xingcui(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China;Shaanxi Huaqin Technology Industry Ltd.,Xi’an 710072,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2020年第9期13-18,共6页
Engineering Plastics Application
基金
国家自然科学基金项目(51402239)。
