Abstract
Hierarchically three-dimensional(3D)materials present a pivotal challenge and opportunity in achiev-ing effective microwave absorption with synergistic effects.In this work,α-Fe2O3@ZrO2 with core-shell structure were fabricated in-situ on aramid nanofibers by a solvothermal method.Following calcination,3D ZrO2/Fe3O4/C nanocomposites with Janus structure have been successfully synthesized.By control-ling the lattice match and mismatch in both processes,a core-shell structure of α-Fe2O3@ZrO2 and Janus structure of ZrO2/Fe3O4 have been well-define performed.The composite material ZrO2/Fe3O4/C-700 has a minimum reflection loss(RLmin)of-67.4 dB at a thickness of 2.0 mm.The effective absorption band-width(EAB)at a thickness of 2.4 mm is 6.0 GHz(11.0-17.0 GHz).This study provides a novel strategy for fabricating high-efficiency electromagnetic wave absorption materials with dual synergistic effects in nanosized scale.
基金项目
National Natural Science Foundation of China(51873004)
NETL
NSTL
万方数据