Enhancement of microwave absorption performance of porous carbon induced by Ce (CO3) OH

Jijun Wang; Yuhua Chen; Yaxing Wei; Yan Li; Fangyuan Li; Bingzhen Li; Qingqing Wu; Jinlong Zhao

doi:10.3389/fchem.2022.1100111

Enhancement of microwave absorption performance of porous carbon induced by Ce (CO₃) OH

Front Chem. 2023 Jan 9:10:1100111. doi: 10.3389/fchem.2022.1100111. eCollection 2022.

Authors

Jijun Wang^{1

2}, Yuhua Chen², Yaxing Wei², Yan Li², Fangyuan Li², Bingzhen Li², Qingqing Wu², Jinlong Zhao²

Affiliations

¹ Chinese People's Liberation Army, Beijing, China.
² Institute of Defense Engineering, Academy of Military Sciences, Beijing, China.

Abstract

In recent years, electromagnetic pollution has become more and more serious, resulting in a very negative impact on people's health. Therefore, it is important to develop efficient microwave absorbers to reduce electromagnetic pollution. Here, we construct a novel absorbing material of the polymer gel-derived porous carbon decorated by rare earth compounds (Ce (CO₃) OH). When the thickness is 2.2 mm, the composite exhibits excellent microwave absorption performance with the optimal RL_min value and EAB reached up to -47.67 dB and 5.52 GHz, respectively, covering the Ku band. The high-efficiency microwave absorption is mainly attributed to the synergistic effect of dipole polarization, defect polarization and interfacial polarization. This work not only provides a new view for designing superior absorber materials, but also lay a foundation for their real applications.

Keywords: Ce (CO3) OH/C composite; impedance matching; microwave absorbers; rare earth compounds (Ce (CO3) OH); synergistic effect.