Achieving full effective microwave absorption in X band by double-layered design of glass fiber epoxy composites containing MWCNTs and Fe3O4 NPs |
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| Affiliation: | 1. Engineering Training and Teaching Center, Northeast Electric Power University, JiLin City, JiLin Province 132012, China;2. DS & CI Research Group, Universitas Sumatera Utara, Medan, Indonesia;3. Department of Physics, Muhammad Nawaz Sharif University of Engineering and Technology, Multan 60000, Pakistan;1. Dept. of Mech Engg, Andhra University, Visakhapatnam, 530330, India;2. Dept. of Mech Engg, D.M.S.S.V.H.College Of Engineering, 521001, India;1. Engineering Technology Research Center of Magnetic Materials of Anhui Province, School of Physics & Materials Science, Anhui University, Hefei 230601, China;2. School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China;1. Department of Aerospace Engineering, School of Mechanical, Aerospace & System Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea;2. Structures & Materials Department, Korea Aerospace Research Institute, 169-84 Gwahak-ro, Yuseong-gu, Daejeon 305-806, Republic of Korea;3. Composite Research Center, Korea Institute of Materials Science, 797 Changwondaero, Seongsan-gu, Changwon, Gyeongnam 642-831, Republic of Korea |
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| Abstract: | The glass fiber epoxy composites containing MWCNTs and Fe3O4 NPs were manufactured by composites liquid molding process. The microwave absorbing properties of single-layered and double-layered glass fiber/MWCNTs/epoxy and glass fiber/Fe3O4 NPs/epoxy composites were evaluated. The reflection loss(RL) were calculated by the measured complex permittivity and permeability using waveguide method by vector network analyzer. Based on the mechanism analysis and deficiency of single-layer absorber, the double-layered composites were fabricated by using matching layer and absorbing layer to enhance the microwave absorption performance, which can be modulated by tailoring the electromagnetic parameters and thicknesses of each layer. The optimized microwave absorbing properties of double-layered composites with minimum RL of −45.7 dB and full X-band effective absorption can be achieved when the total thickness of the matching layer and absorbing layer is 1.8 mm, which can be attributed to synergistic effect of improved impedance matching characteristic and superior microwave attenuation characteristic of the absorbing layer. The combined utilization of dielectric loss and magnetic loss absorbent and their double-layered structure design shows great design flexibility and diversity and can be a promising candidate for designing high performance microwave absorbing materials. |
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| Keywords: | Microwave absorption Fiber reinforced composites MWCNTs Double-layered |
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