Fabrication and microwave absorption properties of magnetite nanoparticle–carbon nanotube–hollow carbon fiber composites |
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| Affiliation: | 1. Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Education of Ministry, Shanghai 201804, PR China;2. School of Materials Science and Engineering, Tongji University, Shanghai 201804, PR China;1. Deakin University, Carbon Nexus, Institute for Frontier Materials, Geelong, Victoria 3216, Australia;2. CSIRO Manufacturing, Waurn Ponds, Geelong, Victoria 3216, Australia;1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China;2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China;1. Physics Department, Guizhou University, Guiyang 550025, People''s Republic of China;2. Nanjing National Laboratory of Microstructures and Jiangsu Provincial Laboratory for NanoTechnology, Nanjing University, Nanjing 210093, People''s Republic of China;1. Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, PR China;2. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, PR China;3. Aerosapce Research Institute of Materials & Processing Technology, Beijing, 100076, PR China;4. 310 Department, Third Institution of China Aerospace Science & Industry, Beijing 100071, PR China;1. State Key Laboratory for Modification of Chemical Fibres and Polymer Materials, Donghua University, Shanghai 201620, PR China;2. College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China;3. Science and Technology on Electromagnetic Scattering Laboratory, Shanghai 200090, PR China;4. Texas Tech University, 2500 Broadway, Lubbock, TX 79409, USA |
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| Abstract: | Absorbents with “tree-like” structures, which were composed of hollow porous carbon fibers (HPCFs) acting as “trunk” structures, carbon nanotubes (CNTs) as “branch” structures and magnetite (Fe3O4) nanoparticles playing the role of “fruit” structures were prepared by chemical vapor deposition technique and chemical reaction. Microwave reflection loss, permittivity and permeability of Fe3O4–CNTs–HPCFs composites were investigated in the frequency range of 2–18 GHz. It was proven that prepared absorbents possessed the excellent electromagnetic wave absorbing performances. The bandwidth with a reflection loss less than ?15 dB covers a wide frequency range from 10.2 to 18 GHz with the thickness of 1.5–3.0 mm, and the minimum reflection loss is ?50.9 dB at 14.03 GHz with a 2.5 mm thick sample layer. Microwave absorbing mechanism of the Fe3O4–CNTs–HPCFs composites is concluded as dielectric polarization and the synergetic interactions exist between Fe3O4 and CNTs–HPCFs. |
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