Three-dimensional(3D)ordered porous carbon is generally believed to be a promising electromagnetic wave(EMW)absorbing mate-rial.However,most research works targeted performance improvement of 3D ordered porous carbon,and the specific attenuation mechanism is still ambiguous.Therefore,in this work,a novel ultra-light egg-derived porous carbon foam(EDCF)structure has been successfully constructed by a sim-ple carbonization combined with the silica microsphere template-etching process.Based on an equivalent substitute strategy,the influence of pore volume and specific surface area on the electromagnetic parameters and EMW absorption properties of the EDCF products was confirmed respec-tively by adjusting the addition content and diameter of silica microspheres.As a primary attenuation mode,the dielectric loss originates from the com-prehensive effect of conduction loss and polarization loss in S-band and C band,and the value is dominated by polarization loss in X band and Ku band,which is obviously greater than that of conduction loss.Furthermore,in all samples,the largest effective absorption bandwidth of EDCF-3 is 7.12 GHz under the thickness of 2.13 mm with the filling content of approximately 5 wt％,covering the whole Ku band.Mean-while,the EDCF-7 sample with optimized pore volume and specific surface area achieves minimum reflection loss(RLmin)of-58.08 dB at 16.86 GHz while the thickness is 1.27 mm.The outstanding research results not only provide a novel insight into enhancement of EMW absorption properties but also clarify the dominant dissipation mechanism for the porous carbon-based absorber from the perspective of objective experiments.

Meng Zhang;Hailong Ling;Ting Wang;Yingjing Jiang;Guanying Song;Wen Zhao;Laibin Zhao;Tingting Cheng;Yuxin Xie;Yuying Guo;Wenxin Zhao;Liying Yuan;Alan Meng;Zhenjiang Li

College of Materials Science and Engineering,College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,People's Republic of China;State Key Laboratory Base of Eco-Chemical Engineering,College of Chemistry and Molecular Engineering,College of Chemical Engineering in Gaomi Campus,Qingdao University of Science and Technology,Qingdao 266042,People's Republic of China

纳微快报（英文）

[1]Meng Zhang;Hailong Ling;Ting Wang;Yingjing Jiang;Guanying Song;Wen Zhao;Laibin Zhao;Tingting Cheng;Yuxin Xie;Yuying Guo;Wenxin Zhao;Liying Yuan;Alan Meng;Zhenjiang Li-.An Equivalent Substitute Strategy for Constructing 3D Ordered Porous Carbon Foams and Their Electromagnetic Attenuation Mechanism)[J].纳微快报（英文）,2022(10):15-35

Substitute,EDCF

An,Equivalent,Strategy,Constructing,Ordered,Porous,Carbon,Foams,Their,Electromagnetic,Attenuation,Mechanism,Three,dimensional,ordered,porous,generally,believed,promising,electromagnetic,wave,EMW,absorbing,rial,However,most,research,works,targeted,performance,improvement,specific,attenuation,mechanism,still,ambiguous,Therefore,this,novel,ultra,light,egg,derived,foam,structure,has,been,successfully,constructed,by,sim,carbonization,combined,silica,template,etching,process,Based,equivalent,substitute,strategy,influence,pore,volume,surface,area,parameters,absorption,properties,products,was,confirmed,respec,tively,adjusting,addition,content,diameter,microspheres,primary,mode,dielectric,loss,originates,from,prehensive,conduction,polarization,value,dominated,Ku,which,obviously,greater,than,that,Furthermore,samples,largest,effective,bandwidth,GHz,under,thickness,filling,approximately,wt,covering,whole,Mean,while,optimized,achieves,minimum,reflection,RLmin,dB,outstanding,results,not,only,provide,insight,into,enhancement,but,also,clarify,dominant,dissipation,absorber,perspective,objective,experiments

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