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Synthesis of MOF-derived Fe7S8/C rod-like composites by controlled proportion of carbon for highly efficient electromagnetic wave absorption
Composites Part A: Applied Science and Manufacturing ( IF 8.1 ) Pub Date : 2020-12-13 , DOI: 10.1016/j.compositesa.2020.106246
Yunfei Yang , Dongmei Xu , Longfei Lyu , Fenglong Wang , Zhou Wang , Lili Wu , Wei Liu , Jiurong Liu

In this study, we firstly used the MOF-derived Fe7S8/C rod-like composites as absorbers and systematically investigated the synergistic effect of Fe7S8 and carbon in electromagnetic wave absorption applications. By controlling the introduced dosage of ferric salt, the proportion of carbon and Fe7S8 in composites could be adjusted, which made a significant effect on the electromagnetic parameters and absorption performance. When the carbon proportion was about 33.9 wt%, the synergistic effect between Fe7S8 and carbon guaranteed the optimized impedance matching and strong dissipation ability, presenting superb absorption performance. The optimal performance reflected in the minimum reflection loss of −68.86 dB at 12.08 GHz with a thickness of 1.67 mm, and the effective bandwidth was up to 4.56 GHz at 1.45 mm. Therefore, this study provides a facile method for preparing the Fe7S8/C absorbers and emphasizes the significance of the ratios between Fe7S8 and carbon on the electromagnetic parameters and absorption performance.



中文翻译:

碳的控制比例合成MOF衍生的Fe 7 S 8 / C棒状复合材料,可高效吸收电磁波

在这项研究中,我们首先使用MOF衍生的Fe 7 S 8 / C棒状复合材料作为吸收剂,并系统地研究了Fe 7 S 8和碳在电磁波吸收应用中的协同作用。通过控制铁盐的加入量,可以调节碳和Fe 7 S 8在复合材料中的比例,这对电磁参数和吸收性能有显着影响。当碳含量为约33.9重量%时,Fe 7 S 8之间的协同作用碳保证了最佳的阻抗匹配和强大的耗散能力,具有出色的吸收性能。最佳性能体现在厚度为1.67 mm的12.08 GHz处的最小反射损耗为−68.86 dB,而在1.45 mm处的有效带宽高达4.56 GHz。因此,本研究提供了一种制备Fe 7 S 8 / C吸收剂的简便方法,并强调了Fe 7 S 8与碳之比对电磁参数和吸收性能的重要性。

更新日期:2020-12-18
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