Abstract
Structural design and elemental doping are research hotspots for the preparation of lightweight absorbers with high absorption performance and low filling ratio.Herein,a P-doped hydrangea-like layered compos-ite(Co2P/Ni2P@C)encapsulated with Ni-LDH was successfully synthesized by solvothermal method fol-lowed by phosphorization.The defects generated by P doping and the generation of multilayered nonuni-form interfaces enhance the dielectric loss induced by polarization.Simultaneously,the magnetic phos-phides induce magnetic loss and modulate the dielectric properties of the carbon matrix to enhance the conductive loss.The multilayered hollow structure of this composite promotes the scattering and reflec-tion of electromagnetic waves and optimizes the impedance characteristics.As a result,the multilayered hollow Co2P/Ni2P@C composite exhibits an optimum reflection loss value(RL)of-64.6 dB at 15.1 GHz with a thickness of 2 mm and a filler ratio of only 10 wt％.The radar cross-section(RCS)attenuation further demonstrates that the material can dissipate microwave energy in practical applications.Overall,this work provides an effective development strategy for the design of multilayered high-performance electromagnetic wave(EMW)absorbers doped with strongly polarized elements.
基金项目
国家自然科学基金(61701386)
国家自然科学基金(21975196)
国家自然科学基金(51771140)
Young Star Project of Science and Technology of Shaanxi Province(2019KJXX-033)
Natural Science Basic Research Program of Shaanxi Province(2022JM-358)
NETL
NSTL
万方数据