Enhanced electromagnetic microwave absorption properties of SiCN(Fe) ceramics produced by additive manufacturing via in-situ reaction of ferrocene |
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| Affiliation: | 1. School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255049, China;2. Department of Industrial Engineering, University of Padova, Italy;3. Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Jinan, 250061, PR China;4. Refractories, Ceramics and Building Materials Department, National Research Centre, El-Bohous Str., 12622, Dokki, Cairo, Egypt;5. Department of Ceramic Materials Engineering, University of Bayreuth, 95447, Bayreuth, Germany;6. Department of Materials Science and Engineering, The Pennsylvania State University, USA;1. Institute of Aeronautics and Space, São José dos Campos, SP, 12228-904, Brazil;2. Institute for Advanced Studies, São José dos Campos, SP, 12228-001, Brazil;1. Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China;2. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China;1. University of Electronic Science and Technology of China, School of Optoelectronic Science and Engineering, Chengdu, 610054, PR China;2. North University of China, School of Information and Communication Engineering, Taiyuan, 030000, PR China;3. SensView Technology (Chengdu) Co., Ltd., Chengdu, 610054, PR China;4. University of Electronic Science and Technology of China, School of Electronic Science and Engineering, Chengdu, 610054, PR China;1. College of Resources and Civil Engineering, Northeastern University, Shenyang, China;2. Science and Technology Innovation Center of Smart Water and Resource Environment, Northeastern University, Shenyang, 110819, China;3. School of Mathematics and Physical Sciences, University College London, London, WC1E 6BT, UK |
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| Abstract: | SiCN(Fe) ceramics with excellent electromagnetic wave (EMW) absorption performance were successfully prepared from a preceramic polymer doped with ferrocene. Additive manufacturing (Digital Light Processing), providing enhanced structural design ability, was employed to fabricate samples with complex architectures. During pyrolysis, ferrocene catalyzed the in-situ formation of a large amount of turbostratic carbon, graphite and SiC nanosized phases, which formed carrier channels in the electromagnetic field and increased the conductivity loss. Meanwhile, it also increased the dipole polarization, interface polarization and the dielectric properties of the material, which finally enhanced the EMW absorption capacity of SiCN(Fe) ceramics. When containing 0.5 wt% ferrocene, the material showed good performance with EAB 4.57 GHz at 1.30 mm, and RLmin ?61.34 dB at 2.22 mm. The RLmin of 3D-SiCN-0.5 ceramics was ?6 dB, and the RL of the X-band was lower than ?4 dB at 2 mm. |
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| Keywords: | Polymer derived ceramics EMW absorption SiCN Additive manufacturing |
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