Absorption-Reflection-Transmission Power Coefficient Guiding Gradient Distribution of Magnetic MXene in Layered Composites for Electromagnetic Wave Absorption  

作　　者：Yang Zhou Wen Zhang Dong Pan Zhaoyang Li Bing Zhou Ming Huang Liwei Mi Chuntai Liu Yuezhan Feng Changyu Shen 

机构地区：[1]State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450002,People’s Republic of China [2]Yaoshan Laboratory,Pingdingshan University,Pingdingshan 467000,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第6期466-481,共16页纳微快报(英文版)

基　　金：support for this work by Key Research and Development Project of Henan Province(Grant.No.241111232300);the National Natural Science Foundation of China(Grant.No.52273085 and 52303113);the Open Fund of Yaoshan Laboratory(Grant.No.2024003).

摘　　要：The morphological distribution of absorbent in composites is equally important with absorbents for the overall electromagnetic properties,but it is often ignored.Herein,a comprehensive consideration including electromagnetic component regulation,layered arrangement structure,and gradient concentration distribution was used to optimize impedance matching and enhance electromagnetic loss.On the microscale,the incorporation of magnetic Ni nanoparticles into MXene nanosheets(Ni@MXene)endows suitable intrinsic permittivity and permeability.On the macroscale,the layered arrangement of Ni@MXene increases the effective interaction area with electromagnetic waves,inducing multiple reflection/scattering effects.On this basis,according to the analysis of absorption,reflection,and transmission(A-R-T)power coefficients of layered composites,the gradient concentration distribution was constructed to realize the impedance matching at low-concentration surface layer,electromagnetic loss at middle concentration interlayer and microwave reflection at high-concentration bottom layer.Consequently,the layered gradient composite(LG5-10-15)achieves complete absorption coverage of X-band at thickness of 2.00-2.20 mm with RL_(min) of-68.67 dB at 9.85 GHz in 2.05 mm,which is 199.0%,12.6%,and 50.6%higher than non-layered,layered and layered descending gradient composites,respectively.Therefore,this work confirms the importance of layered gradient structure in improving absorption performance and broadens the design of high-performance microwave absorption materials.

关 键 词：Magnetic MXene Layered and gradient structure Power coefficient Electromagnetic wave absorption 

分 类 号：TG6[金属学及工艺—金属切削加工及机床]