High electromagnetic wave absorbing performance of activated hollow carbon fibers decorated with CNTs and Ni nanoparticles |
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| Affiliation: | 1. School of Materials Science and Engineering, Tongji University, Shanghai 201804, PR China;2. Key Laboratory of Advanced Civil Engineering Materials, Education of Ministry, Tongji University, Shanghai 201804, PR China;1. School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an, Shaanxi 710021, China;2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China;1. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China;2. Key Laboratory of Material Physics of Ministry of Education, Zhengzhou University, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450052, China;3. Henan Key Laboratory of aeronautical material and application technology, Zhengzhou University of Aeronautics, Zhengzhou, Henan 450046, China;4. Department of Materials and Engineering, University of Central Florida, Orlando, FL 32826, USA;1. College of Civil Engineering, Nanjing Tech University, 30 Puzhu Road(S), Nanjing, Jiangsu Province 211800, China;2. Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, South Korea;3. Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, South Korea;1. Division of Aerospace Eng., Department of Mechanical Eng., Korea Advanced Institute of Science and Technology (KAIST), 371-1, Gusong-dong, Yusong-Gu, Daejon, 305-701, South Korea;2. Gamma Nu Inc., 185-44, DontanMyun, Hwaseong, Kyonggi-Do, South Korea |
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| Abstract: | Activated hollow carbon fibers (ACHFs) decorated with carbon nanotubes (CNTs) and nickel nanoparticles (CNTs–Ni–ACHFs) were prepared by thermal reduction and chemical vapor deposition technique. Microwave reflection loss, permittivity and permeability of CNTs–Ni–ACHFs composites as novel electromagnetic wave absorbents were studied in the frequency range of 2–18 GHz. It was demonstrated that CNTs–Ni–ACHFs absorbents possessed the best microwave absorbing performances whose minimum reflection loss was ?43.457 dB at 13.10 GHz with a thickness of 2.0 mm, which is much better than those of Ni–ACHFs and ACHFs samples. The dielectric polarizations and magnetic loss derived from the effect of the porous structures, Ni nanoparticles, and defects in the CNTs–Ni–ACHFs composites are playing an important role for the excellent microwave absorbing performances. |
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| Keywords: | B Composites B Fibers D Carbon Microwave absorption |
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