Heterostructure design of hydrangea-like Co_(2)P/Ni_(2)P@C multilayered hollow microspheres for high-efficiency microwave absorption  

作　　者：Wei Wang Kai Nan Hao Zheng Qingwei Li Yan Wang 

机构地区：[1]School of Materials and Chemical Engineering,Xi’an Technological University,Xi’an 710021,China [2]Department of Joint Surgery,Honghui Hospital,Xi’an Jiaotong University,Xi’an 710054,China

出　　处：《Journal of Materials Science & Technology》2024年第14期104-114,共11页材料科学技术（英文版）

基　　金：support from the National Natural Science Foundation of China(Nos.61701386,21975196,51771140);the Young Star Project of Science and Technology of Shaanxi Province(No.2019KJXX-033);the Natural Science Basic Research Plan in Shaanxi Province of China(No.2022JM-358).

摘　　要：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(Co_(2)P/Ni_(2)P@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 Co_(2)P/Ni_(2)P@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.

关 键 词：Microwave absorption P-DOPING Radar cross section Multilayered hollow architecture Hydrangea-like 

分 类 号：TB33[一般工业技术—材料科学与工程]