Fabrication of NixCo3-xS4 hollow nanosphere as wideband electromagnetic absorber at thin matched thickness |
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| Affiliation: | 1. Institute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, PR China;2. College of Electromechanical Engineering, Key Laboratory of Polymer Material Advanced Manufacturing''s Technology of Shandong Province, Qingdao University of Science and Technology, Qingdao, 266061, China;3. Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji, 721016, PR China;1. Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;2. School of Science, Yanshan University, Qinhuangdao 066004, China;1. Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China;2. MOE Key Laboratory of Space Applied Physics and Chemistry, Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi’an 710072, China;1. Heilongjiang River Fisheries Research Institute of Chinese Academy of Fishery Sciences/Laboratory of Quality & Safety Risk Assessment for Aquatic Products (Harbin), Ministry of Agriculture, Harbin 150070, PR China;2. Harbin Fiber Reinforced Plastics Institute Co, Ltd, Harbin 150029, PR China;3. School of Pharmacy, Harbin University of Commerce, Harbin 150076, PR China;4. School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China |
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| Abstract: | Nowadays, transition metal sulfide (TMS), especially for spinel crystal structure (AxB3-xS4), have been proved to be a promising electromagnetic (EM) absorber if been used to deal with the severe electromagnetic pollution. However, EM performance degradation and absorption layer thickness-decreasing at present remains a big challenge, owning to the poor EM attenuation ability. To overcome this barrier, herein we reported a NixCo3-xS4 (x = 0, 0.3, 0.6, 1.0) absorber with hollow sphere structure to realize a good EM performance with a thinner matched thickness (<1.5 mm). The average sizes of these NixCo3-xS4 distributed in 450–550 nm. The dielectric loss ability (ε'') can be boosted by tuning the molar ratio of Ni/Co, which attributes to EM performance. Additionally, hollow structure would lead to the electromagnetic multi-reflection, also benefited to EM performance. The results demonstrated that the maximum qualified absorption bandwidth (fE) of 3.8 GHz can be achieved for the Ni0·3Co2·7S4 sample when specimen thickness only equals to 1.3 mm. |
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| Keywords: | Spinel sulfide Hollow sphere Tunable molar ratio Electromagnetic absorption |
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