The influence of carbon materials on the absorption performance of polymer-derived SiCN ceramics in X-band |
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| Authors: | Yurun Feng Xue Guo Hongyu Gong Yujun Zhang Yu Liu Xiao Lin Junjie Mao |
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| Affiliation: | 1. Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials of Ministry of Education, Shandong University, Jingshi Road 17923, Jinan 250061, Shandong, China;2. Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Jingshi Road 17923, Jinan 250061, Shandong, China |
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| Abstract: | Carbon-containing polymer-derived SiCN ceramics (PDCs-SiCN-C) were successfully fabricated with multi-layer graphene (MLG) and multiwalled carbon nanotubes (MWCNTs) as additives at 1100?°C. The effects of MLG and MWCNTs on the microwave absorption properties of PDCs-SiCN-C ceramics were analyzed. The imaginary permittivity and loss tangent of SiCN-MLG and SiCN-MWCNTs were about 3.4, 0.67 at 11.2?GHz and 3.1, 0.57 at 10.6?GHz, respectively. The minimum reflection loss of SiCN-MLG and SiCN-MWCNTs at 3?mm was ??54?dB and ??48?dB with the effective absorption bandwidth (RL ≤ ?10?dB, >90% absorption) about 1.5?GHz and 0.9?GHz in X-band. |
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| Keywords: | Ceramics Polymer-derived method Multi-layer graphene Multiwalled carbon nanotubes Microwave absorption properties |
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