Electromagnetic wave absorption performance of Graphene/SiC nanowires based on graphene oxide

• DOI: 10.1016/j.jallcom.2020.155172
• Publication Date: 2020-04-17T01:34:57Z
• Authors: Xiaopeng Li; Zhaoqian Li; Longkun Que; Yongjun Ma; Lie Zhu; Chonghua Pei
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Abstract Graphene/SiC composites and SiC nanowires (SiC NWs) were successfully prepared by a facile carbothermal reduction method using silicon powder and graphene oxide in one step. The dielectric properties and microwave absorption performances of the resulting products at different reaction temperatures were investigated at the frequency between 2 and 18 GHz. High-quality SiC NWs acquired at 2:1 (molar ratio). SiC NWs obtained from 1400 °C possesses maximum dielectric values. When the reaction temperature was 1450 °C, SiC NWs exhibits the best microwave absorption abilities with a minimum reflection of −14 dB at 11.8 GHz with a layer thickness of 2.7 mm. The effective absorption bandwidth was 4.1 GHz which is larger than that from the other two conditions. For graphene/SiC composites, the sample derived from 1400 °C shows extremely high EM absorption performance. So, it is predicted that the target substance has a great potential serving as high effective EM wave absorbers.