Conductive substrates-based component tailoring via thermal conversion of metal organic framework for enhanced microwave absorption performances

Xiaogu Huang; Yabin Ma; Haoran Lai; Qi Jia; Liyan Zhu; Jun Liu; Bin Quan

doi:10.1016/j.jcis.2021.10.137

Conductive substrates-based component tailoring via thermal conversion of metal organic framework for enhanced microwave absorption performances

J Colloid Interface Sci. 2022 Feb 15;608(Pt 2):1323-1333. doi: 10.1016/j.jcis.2021.10.137. Epub 2021 Oct 28.

Authors

Xiaogu Huang¹, Yabin Ma¹, Haoran Lai², Qi Jia³, Liyan Zhu³, Jun Liu³, Bin Quan⁴

Affiliations

¹ School of Chemistry and Materials Science, Nanjing University of Information Science & Technology, Nanjing 210044, China.
² Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China.
³ College of Field Engineering, Army Engineering University of PLA, Nanjing 210094, China.
⁴ School of Chemistry and Materials Science, Nanjing University of Information Science & Technology, Nanjing 210044, China. Electronic address: binquan@nuist.edu.cn.

PMID: 34742057
DOI: 10.1016/j.jcis.2021.10.137

Abstract

Component tailoring, especially for the conductive substrates-based composites, acts as a significant role in optimizing the electromagnetic (EM) parameters and improving the EM response capability. Here, Fe-based metal oxides modified rGO microwave absorbers with component evolution were fabricated through hydrothermal treatment and subsequent pyrolysis process. The synergistic effects of the dielectric loss (multi-relaxations) and the magnetic loss (resonance and eddy current) are found to be effective in promoting the microwave absorption property of Fe_x-1O_x/C/rGO absorbers. As the thermal treatment temperature reaches 500 °C, the as-prepared composite sample shows ideal microwave absorption performance, where the reflection loss value is -25.94 dB, and the effective bandwidth reaches 5.84 GHz at 1.9 mm. In addition, CST simulation was employed to analyze the microwave absorption capability in the actual far field. When the scattering angle is 0° and 20°, the radar cross section (RCS) reduction of S-500/PEC layers is 8.11 dB m² and 8.80 dB m², respectively. This study exhibits the importance of component tailoring in enhancing the performances of substrates-based microwave absorption materials.

Keywords: Broad-band absorption; Fe-MOF; Microwave absorption; Synergistic effect; rGO.