A double network nested foam composite with tunable electromagnetic wave absorption performance was fabricated via a carbonization,impregnation,and chemical vapor infiltration method.The research results indicated tha...A double network nested foam composite with tunable electromagnetic wave absorption performance was fabricated via a carbonization,impregnation,and chemical vapor infiltration method.The research results indicated that the three-dimensional interconnected carbon foam was successfully enhanced by the SiC nanowire network.As expected,the electromagnetic absorption performance of the as-prepared SiC nanowire reinforced carbon foam(SiC_(nw)/CF)was greatly improved by the introduction of the SiC nanowires.The SiC_(nw)/CF composite prepared with a lower concentration of Ni catalyst possessed an excellent microwave absorption property with the lowest reflection loss value of-36.31 dB with a matched thickness of 2.60 mm accompanied by the widest effective bandwidth of 4.52 dB.An increase in catalyst concentration degraded the electromagnetic absorption ability to a certain extent.A potential microwave absorption schematic diagram was finally proposed,and it stated that the SiC nanowire network played an essential role in the improvement of the electromagnetic absorption properties.展开更多
基金supported by the National Natural Science Foundation of China[grant number 51772151,51761145103]the Nanjing University of Aeronautics and Astronautics PhD short-term visiting scholar project([2018]47)[grant number 190105DF06]the Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘A double network nested foam composite with tunable electromagnetic wave absorption performance was fabricated via a carbonization,impregnation,and chemical vapor infiltration method.The research results indicated that the three-dimensional interconnected carbon foam was successfully enhanced by the SiC nanowire network.As expected,the electromagnetic absorption performance of the as-prepared SiC nanowire reinforced carbon foam(SiC_(nw)/CF)was greatly improved by the introduction of the SiC nanowires.The SiC_(nw)/CF composite prepared with a lower concentration of Ni catalyst possessed an excellent microwave absorption property with the lowest reflection loss value of-36.31 dB with a matched thickness of 2.60 mm accompanied by the widest effective bandwidth of 4.52 dB.An increase in catalyst concentration degraded the electromagnetic absorption ability to a certain extent.A potential microwave absorption schematic diagram was finally proposed,and it stated that the SiC nanowire network played an essential role in the improvement of the electromagnetic absorption properties.
