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以采用溶胶凝胶结合氢气还原法制备出的铁镍合金纳米颗粒为催化剂,原位裂解苯,成功合成铁镍合金与纳米碳管的复合物。场发射扫描电镜和高分辨透射电镜结果显示复合物为一维纳米管状结构。微波电磁参数测量结果表明:随着试样厚度的增加,匹配频率处的理论反射损耗量呈下降趋势;当厚度为1.5mm时,FeNi22@C复合物的微波吸收效果最好,在频率11.35GHz处反射损耗量为-4.74dB;可以通过改变铁镍合金中各成分的比例、复合物吸收厚度,调整复合物的复数介电常数和复数磁导率,优化复合物的微波吸收性能。
The iron-nickel alloy nanoparticles prepared by sol-gel combined with hydrogen reduction method are used as catalyst to crack benzene in situ and successfully synthesize the composite of iron-nickel alloy and carbon nanotube. Field emission scanning electron microscopy and high resolution transmission electron microscopy showed that the complex was a one-dimensional nanotube structure. The measurement results of microwave electromagnetic parameters show that the theoretical reflection loss at the matching frequency decreases with the increase of the sample thickness. When the thickness is 1.5mm, the microwave absorption of the FeNi22 @ C composite is the best. At the frequency of 11.35GHz The reflection loss is -4.74dB. The microwave absorbing properties of the composites can be optimized by changing the proportion of each component in the Fe-Ni alloy, the absorption thickness of the composite and the complex permittivity and complex permeability of the composite.