Hierarchical electromagnetic absorption in micro-waveguide stuffed with magnetic media for resin-based composites of graphene nanosheets and manganese oxides |
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| Affiliation: | 1. School of Mechanical & Power Engineering, Shanghai Jiaotong University, Shanghai 200240, China;2. State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China;1. Molecular Structure Analysis, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, D-69009 Heidelberg, Germany;2. NMR Research Centre, Solid State and Structural Chemistry Unit, Indian Institute of Science, IN-560012 Bangalore, India;1. Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin University, Tianjin, 300072, PR China;2. Guizhou Radio and Television University, Guiyang, 550004, PR China;1. Peter the Great St. Petersburg Polytechnic University, St. Petersburg 195251, Russian Federation;2. St. Petersburg Academic University, St. Petersburg 194021, Russian Federation;3. Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russian Federation;1. Department of Physics, University of North Florida, 1 UNF Drive, Jacksonville, FL 32224-7699, USA;2. Department of Physics, Indiana University of Pennsylvania, 975 Oakland Avenue, 56 Weyandt Hall, Indiana, PA 15705-1087, USA;3. Graduate Institute of Electronics Engineering and Department of Electrical Engineering, National Taiwan University, Taipei 10617, Taiwan, ROC |
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| Abstract: | Waveguide configurations of hierarchical system are proposed as new microstructures for composites in absorbing enhancement. Supercritical fluid (SCF) one-pot exfoliation of layered graphite and manganese oxide mixing materials is developed to obtain a hierarchical system, containing graphene nanosheets (GNS) and exfoliated manganese oxides (EMO) in different sizes. Composites with GNS–EMO embedded in epoxy resin matrix are produced for a design of dielectric and magnetic loss integrated absorber. Volume fraction of GNS–EMO in composites is given for an optimal quantity of resin epoxy in fixation and formation. The effect of mixing ratios between electric and magnetic components is provided for the design of dielectric and magnetic loss integrated absorbers. Frequency shifting phenomena are revealed in the component adjusting course. Excluding the offsetting sizes, reflection loss of composites is enhanced as thickness increases. Synergistic effect of electric and magnetic coordinated materials demonstrates the superiority of micro-waveguide structures in GNS–EMO composite absorber. |
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| Keywords: | A Graphene B Microstructures E Slip casting Electromagnetic absorbing |
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