J. Mater. Sci. Technol. ›› 2023, Vol. 155: 192-201.DOI: 10.1016/j.jmst.2022.12.056

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Fabrication and efficient electromagnetic waves attenuation of three-dimensional porous reduced graphene oxide/boron nitride/silicon carbide hierarchical structures

Qiuqi Zhanga,b,c,1, Xiao Youb,c,1, Li Tianb,c,d, Mengmeng Wangb,c,d, Xiangyu Zhangb,c, Ying Shia,*, Jinshan Yangb,c,**, Shaoming Dongb,c,e,**   

  1. aSchool of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;
    bState Key Laboratory of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
    cStructural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
    dUniversity of Chinese Academy of Sciences, Beijing 100049, China;
    eCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2022-10-11 Revised:2022-11-27 Accepted:2022-12-25 Published:2023-08-20 Online:2023-03-04
  • Contact: **State Key Laboratory of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sci-ences, Shanghai 200050, China. *E-mail addresses: yshi@shu.edu.cn (Y. Shi), jyang@mail.sic.ac.cn (J. Yang), smdong@mail.sic.ac.cn (S. Dong).
  • About author:1These authors contributed equally to this work.

Abstract: In this work, hierarchical hybrid composites consisting of porous three-dimensional reduced graphene oxide (3D-rGO) skeleton and lamellar boron nitride (BN)/silicon carbide (SiC) coatings are prepared by chemical vapor infiltration (CVI) process. The graphene framework prepared by 3D printing and frozen self-assembly exhibits a lightweight structure and a perforated conductive network, which extends the transmission path of incident microwaves. The introduced ceramic coatings can effectively tune the impedance matching degree and supply a lossy phase, and the hierarchical structure of the composites enhances the multiple scattering of the incident microwaves. As expected, the 3D-rGO/BN/SiC composites possess an excellent absorbing performance with a minimum reflection loss value of -37.8 dB, and the widest effective absorbing bandwidth (RL < -10 dB) of 5.90 GHz is obtained. The controllable fabrication of composites can provide a guideline for rational design and fabrication of high-performance electromagnetic waves absorbing materials in practical applications.

Key words: Porous network structure, Hierarchical structure, Electromagnetic wave absorbing, High attenuation ability, Effective absorbing bandwidth