Ultra-light RGO/MnFe_(2)O_(4)/PI aerogel with oriented pore structure and ultra-broadband microwave absorptionOA
Graphene aerogel,known for its excellent dielectric properties and porous structure,demonstrates outstanding electromagnetic wave absorption.In this study,we fabricated lightweight(11.16 mg/cm^(3))graphene composite aerogels incorporating reduced graphene oxide(RGO),manganese ferrite(MnFe_(2)O_(4)),and polyimide(PI)with oriented pore structures.The addition of MnFe_(2)O_(4)enhances impedance matching and synergistically combines dielectric and magnetic loss mechanisms,significantly improving absorption performance.The composite exhibits an effective absorption bandwidth of 9.216 GHz,covering nearly the entire X and Ku bands(2-18 GHz),with a minimum reflection loss of-75.643 dB.In the 18-26.5 GHz range,the effective bandwidth reaches 7.80 GHz,with a minimum peak of-58.862 dB.At a thickness of 2-2.4 mm,the bandwidth extends to 8.5 GHz,covering the full 18-26.5 GHz range.With a thickness of 1.46-1.8 mm,the bandwidth reaches 13.5 GHz,spanning 26.5-40 GHz,and a minimum peak of-79.560 dB with an 11.30 GHz bandwidth.The oriented porous structure enhances electromagnetic loss,as confirmed through experimental and theoretical analysis.The composite also exhibits excellent mechanical strength and thermal insulation,attributed to its oriented microchannels.This work provides valuable insights for designing lightweight,broadband,and efficient graphene-based absorbers.
Chao Jiang;Yiting Zhu;Zixiang Zhao;Shenglong Huang;Yilun Cheng;Qiancheng Zhang;Mingwei Zhang;Dou Zhang;Zizhao Ding
Powder Metallurgy Research Institute,State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,ChinaPowder Metallurgy Research Institute,State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,ChinaSchool of Physics,and Conway Institute of Biomolecular and Biomedical Research,University College Dublin,Dublin 4,IrelandPowder Metallurgy Research Institute,State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,ChinaPowder Metallurgy Research Institute,State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,ChinaSchool of Physics,and Conway Institute of Biomolecular and Biomedical Research,University College Dublin,Dublin 4,IrelandPowder Metallurgy Research Institute,State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,ChinaPowder Metallurgy Research Institute,State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,ChinaPowder Metallurgy Research Institute,State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China
化学化工
graphene oxide(GO)aerogelmanganese ferrite(MnFe_(2)O_(4))broadband waveX-bandKu-band
《Nano Research》 2026 (3)
P.915-930,16
supported by the Hunan Science and Technology Innovation Talents Program(No.2021RC3003).
评论