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The electromagnetic property and microwave absorption of wormhole-like mesoporous carbons with different surface areas

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Abstract

A sol–gel method has been utilized for synthesizing the wormhole-like mesoporous carbon (WMC), in which the gel skeleton can be regulated by using hydrofluoric acid and sulfuric acid. The electromagnetic characteristics of a series of WMCs with different surface areas embedded in paraffin at 15 wt% loading at 2–18 GHz were investigated. The electric conductivity of WMCs gradually increases with the decrease of surface area, leading to an increase in complex permittivity through dielectric loss. A minimum reflection loss (RL) value of −68.41 dB and a broader absorption band (reach 9.8 GHz) with RL values less than −10 dB are obtained, due to WMC’s well matching the characteristic impedance and dielectric loss, implying its great potential as a microwave absorbing material.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51276044 and 51302043), the Science and Technology Program of Guangdong Province of China (Grant Nos. 2016A020221031, 2015B010135011, and 2015A050502047), and the Science and Technology Program of Guangzhou City of China (Grant No. 201508030018).

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Authors and Affiliations

  1. School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China

    Haiping Zhu, Haiyan Zhang, Yiming Chen, Zhenghui Li, Guoxun Zeng, Yingxin Huang, Wenguang Wang & Qibai Wu

  2. School of Computer Science and Technology, Guangdong University of Technology, Guangzhou, 510006, China

    Danfeng Zhang

  3. Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China

    Chunyi Zhi

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  1. Haiping Zhu
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  2. Haiyan Zhang
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Correspondence to Haiyan Zhang.

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Zhu, H., Zhang, H., Chen, Y. et al. The electromagnetic property and microwave absorption of wormhole-like mesoporous carbons with different surface areas. J Mater Sci 51, 9723–9731 (2016). https://doi.org/10.1007/s10853-016-0206-z

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  • DOI: https://doi.org/10.1007/s10853-016-0206-z

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