This paper presents a straightforward and intriguing approach for designing wide bandwidth, lightweight, and tunable electromagnetic wave (EMW) absorbing materials. Drawing inspiration from the "Pharaoh's Snake", biomass carbon source and sucrose were used to fabricate Fe/FeO@porous carbon (PC) composite materials through combustion experiments. Subsequently, high-temperature calcination was applied to enhance the microwave absorbing properties of the materials. The as-prepared composites demonstrate an impressive 6.62 GHz effective bandwidth and an excellent absorption ability of −51.54 dB at a matched thickness of 2.2 mm. Moreover, by tuning the content of magnetic particles and controlling the thickness of the composite material, comprehensive coverage across , , and bands can be achieved. The outstanding performance suggests that the synthesized Fe/FeO@PC porous materials hold significant potential for applications in electromagnetic wave absorption. It opens up a novel, straightforward, and cost-effective approach to acquiring broadband absorbing materials.

中文翻译：

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受法老蛇启发的铁氧体掺杂蔗糖衍生多孔碳复合材料用于宽带电磁波吸收

本文提出了一种简单而有趣的方法来设计宽带宽、轻质和可调谐电磁波（EMW）吸收材料。受“法老之蛇”的启发，利用生物质碳源和蔗糖，通过燃烧实验制备了Fe/FeO@多孔碳（PC）复合材料。随后，采用高温煅烧来增强材料的微波吸收性能。所制备的复合材料在 2.2 mm 的匹配厚度下表现出令人印象深刻的 6.62 GHz 有效带宽和 -51.54 dB 的出色吸收能力。此外，通过调整磁性颗粒的含量和控制复合材料的厚度，可以实现跨、、和波段的全面覆盖。优异的性能表明合成的 Fe/FeO@PC 多孔材料在电磁波吸收方面具有巨大的应用潜力。它开辟了一种新颖、直接且经济高效的获取宽带吸收材料的方法。