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Synthesis and microwave absorption properties of Fe@carbon fibers

机译：Fe @碳纤维的合成和微波吸收性能

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摘要

Composites of carbon and magnetic metal can overcome the eddy current effects and high density of traditional magnetic metals based on their synergistic loss mechanism and tunable electromagnetic properties. Herein, Fe@carbon fiber particles were synthesized by growing iron nanoflakes on the surface of carbon fibers via in situ reduction. The surface morphology, lattice structure and element composition of the synthesized Fe@carbon fibers were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy disperse spectroscopy (EDS) respectively. Based on these qualitative analyses, a possible growth mechanism was proposed for guide production. In order to investigate their electromagnetic absorbing properties, electromagnetic parameters of Fe@carbon fibers-paraffin composites have been evaluated by coaxial reflection/transmission technique. The Fe@carbon fibers-paraffin composites containing different particle contents were prepared to clarify the optimum material ratio. The results showed that the composite loaded with 30 wt% carbon fibers@Fe particles exhibited the most prominent microwave absorption, with strong absorption (maximum reflection loss of ?39.8 dB), effective absorption bandwidth (2.9 GHz) and small thickness (1.5 mm).
机译：基于其协同损失机理和可调谐电磁特性，碳和磁性金属的复合材料可以克服涡流效果和传统磁性金属的高密度。这里，通过原位还原通过在碳纤维表面上生长铁纳米薄片来合成Fe @碳纤维颗粒。通过扫描电子显微镜（SEM），X射线衍射（XRD）和能量分散光谱（EDS）分析合成Fe @碳纤维的表面形态，晶格结构和元素组成。基于这些定性分析，提出了一种可能的增长机制，用于指导生产。为了研究其电磁吸收性，通过同轴反射/传输技术评估了Fe @碳纤维 - 石蜡复合材料的电磁参数。制备含有不同颗粒内容物的Fe @碳纤维 - 石蜡复合材料以阐明最佳材料比。结果表明，载有30wt％碳纤维的复合材料@ Fe颗粒具有最突出的微波吸收，具有强烈的吸收（最大反射损耗？39.8 dB），有效吸收带宽（2.9GHz）和小厚度（1.5毫米） 。

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