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首页> 外文期刊>Chinese journal of aeronautics >Electromagnetism and Absorptivity of the Modified Micro-coiled Chiral Carbon Fibers
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Electromagnetism and Absorptivity of the Modified Micro-coiled Chiral Carbon Fibers

机译：改性微卷曲手性碳纤维的电磁学和吸收率

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摘要

Micro-coiled chiral carbon fibers are modified by nano-Ni. X-ray diffraction (XRD) and scanning electron microscopy (SEM) are used to compare the composition and morphology of the unmodified and the modified fibers. The results show that electromagnetism parameters of the modified are different from those of the unmodified. After modification by nano-Ni, the micro-coiled chiral carbon fibers have decreased permittivity and electrical loss. The permeability and magnetic loss of the modified carbon fibers become larger than those of the unmodified ones. Moreover, the modification of unmodified chiral carbon fibers into the modified is much like changing hollow electric windings into those with magnetic cores inside. The modifier intensifies the cross polarization of the chiral carbon fibers and makes the permittivity and the permeability get closer to each other which improves the matching performance and enhances absorbability of coatings. In the range of 6-18 GHz, the reflectivity of the coating is 6-8 dB and the bandwidth is 12 GHz. The area density of the coating is below 3 kg/m~2.
机译：微卷曲手性碳纤维被纳米镍改性。 X射线衍射（XRD）和扫描电子显微镜（SEM）用于比较未改性纤维和改性纤维的组成和形态。结果表明，改性后的电磁参数与未改性后的电磁参数不同。经过纳米镍改性后，微卷曲手性碳纤维的介电常数和电损耗降低。改性碳纤维的磁导率和磁损耗变得比未改性碳纤维的磁导率和磁损耗大。此外，将未改性的手性碳纤维改性成改性的过程就像将空心电绕组变为内部具有磁芯的绕组一样。改性剂增强了手性碳纤维的交叉极化作用，并使介电常数和磁导率彼此接近，从而改善了匹配性能并增强了涂层的吸收性。在6-18 GHz范围内，涂层的反射率为6-8 dB，带宽为12 GHz。涂层的面积密度低于3 kg / m〜2。

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