Enhanced interfacial polarization of biomass-derived porous carbon with a low radar cross-section

A biomass-derived “flower cluster” porous carbon was successfully synthesized via a facile process. The as-prepared porous carbon demonstrates excellent microwave absorption property and low radar cross-section characteristics at an ultra-thin thickness, which may have a significant application pros...

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Bibliographic Details
Published in:Journal of colloid and interface science 2022-04, Vol.612, p.146-155
Main Authors: Wang, Jialing, Zhou, Ming, Xie, Zhengchan, Hao, Xingyu, Tang, Shaolong, Wang, Jingwen, Zou, Zhongqiu, Ji, Guangbin
Format: Article
Language:English
Subjects:
Biomass
Biomass-derived porous carbon
Carbon
Interface polarization
Microwave absorption
Microwaves
Porosity
Radar
Radar cross-section
Thin thickness
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Summary:A biomass-derived “flower cluster” porous carbon was successfully synthesized via a facile process. The as-prepared porous carbon demonstrates excellent microwave absorption property and low radar cross-section characteristics at an ultra-thin thickness, which may have a significant application prospect in the field of EM. [Display omitted] Ultra-thin microwave absorbers have been urgently demanded for electromagnetic applications in recent years. Herein, porous carbon with a “flower cluster” microstructure was synthesized from biomass waste (mango seeds) by a facile activation and carbonization method. The novel structure reduced the density and also improved the impedance matching, dipole polarization, and provided many carbon matrix-air interfaces for interfacial polarization, resulting in superior microwave absorption performance. At an ultra-thin thickness of 1.5 mm, extraordinary microwave absorption was achieved, with a reflection loss (RL) of −42 dB. The effective absorption bandwidth reached 4.2 GHz. The RL can be further improved to −68.4 dB by adjusting the amount of activator to manipulate the structure of porous carbon. In addition, from the simulated radar scattering results, the maximum reduction in the radar cross-section (RCS) reached 30.4 dBm2, which can greatly reduce the probability of equipment being detected by radar. This work provides a low-cost and high-performance microwave absorber for electromagnetic stealth technologies.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2021.12.162