Tailorable microwave absorption properties of RGO/SiC/CNT nanocomposites with 3D hierarchical structure. Issue 11 (1st August 2020)

• Record Type: Journal Article
• Authors: Hou, Zexin; Xue, Jimei; Wei, Hanjun; Fan, Xiaomeng; Ye, Fang; Fan, Shangwu; Cheng, Laifei; Zhang, Litong
• Is Part Of: Ceramics international. Volume 46:Issue 11(2020)Part A
• Page Start: 18160
• Page End: 18167
• Publication Date: 2020-08-01
• Subjects: RGO/SiC/CNT ceramic-based composite -- Porous hierarchical structure -- Dual heterogeneous interfaces -- Polarisation loss; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.04.137
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this study, a new composite ceramic consisting of chemical vapor infiltrated (CVI) silicon carbide (SiC) and catalyst-assisted chemical vapor deposited (CACVD) carbon nanotubes (CNTs) on three-dimensional(3D) laminated-structure of reduced graphene oxide (RGO) foam (RGO/SiC/CNT) with a small thickness, lightweight, and robust broadband absorption properties was produced. The dual heterogeneous nanointerfaces between the RGO layers and SiC nanograins, SiC, and CNT network, resulted in a significant increase in the dipole and interfacial polarisation. The composite ceramics with a CNT content of 1.27 wt% exhibit an effective absorption bandwidth (EAB) that covers the entire X-band (8.2–12.4 GHz) and a minimal reflection loss of −20 dB at 9.8 GHz for a thickness of 2.9 mm. Owing to the unique 3D multi-scale hierarchical porous structure, the material has a very low density (approximately 0.7 g cm −3 ). The results of this study present a promising and designable approach for the preparation of lightweight and high-performance ceramic-based electromagnetic wave (EMW) absorption materials.