Nitrogen-doped porous carbon materials were firstly prepared by a two-step method,and then the nitrogen-doped porous carbon/cobalt ferrite composites were synthesized by the hydrothermal method.XRD,FT-IR,XPS,SEM were used to characterize the structure and morphology of the samples.The microwave electromagnetic parameters of the composites were measured by VNA and the frequency range from 2 GHz to 18 GHz,the absorbing properties were calculated by electromagnetic parameters.The results showed that when the cobalt ferrite content was 15%,the sample had the best absorption performance.The minimum reflection loss reached -19.09dB at the frequency of 10.24GHz with a matching thickness of 3.5mm,and the effective absorbing bandwidth was 4GHz.
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基金资助
江苏省研究生科研实践创新项目(rant No.SJCX18-0886)
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