Tailored heterogeneous interface based on porous hollow In-Co-C nanorods to construct adjustable multi-band microwave absorber  

作　　者：Zhengying Shen Di Lan Yi Cong Yuanyuan Lian Nannan Wu Zirui Jia 

机构地区：[1]School of Material Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]Department of Otolaryngology,the Affiliated Hospital of Qingdao University,Qingdao 266000,China [3]School of Materials Science and Engineering,Hubei University of Automotive Technology,Shiyan 442002,China [4]College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China

出　　处：《Journal of Materials Science & Technology》2024年第14期128-137,共10页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52377026 and 52301192);Natural Science Foundation of Shandong Province(No.ZR2019YQ24);Taishan Scholars and Young Experts Program of Shandong Province(No.tsqn202103057);the Qingchuang Talents Induction Program of Shandong Higher Education Institution(Research and Innovation Team of Structural-Functional Polymer Composites),and Special Financial of Shandong Province(Structural Design of High-efficiency Electromagnetic Wave absorbing Composite Materials and Construction of Shandong Provincial Talent Teams).The authors acknowledge the support from Natural Science Foundation of Shandong Province(No.ZR2021QE164).

摘　　要：By rationally controlling the growth of zeolite-imidazolium salt skeleton(ZIF-67)nanoparticles on the hollow indium oxide(In_(2)O_(3))and the subsequent pyrolysis process,In-Co-C hollow rod-like composites with multiple components were successfully prepared in this work.The synergistic impact of diverse components including In_(2)O_(3),C,Co_(3)InC_(0.75),and In not only optimizes impedance matching and improves conductive loss,but also creates significant interfacial polarization.Furthermore,the addition of Co source and pyrolysis temperature was found to have a significant affected on impedance matching and mi-crowave absorption.The optimized In-Co-C sample displayed ultra-broad absorption bandwidth(EAB)of up to 7.12 GHz(10.88–18.0 GHz)at 2.26 mm thickness,which could cover the whole Ku band and part of X-band,outperforming the previously reported MOFs-derived composites.Furthermore,by adjusting the thickness to 2.91 mm and 4.01 mm,the EAB could cover the entire X band and most of the C band.The attenuation mechanisms were systematically investigated through the delta function method and ANSYS high-frequency structure simulator.These findings suggest that the MOFs-derived In-Co-C hollow nanorods could serve as high-performance microwave absorbers with ultra-broad absorption.

关 键 词：Microwave absorption Hollow rod-like MOFs-derived Conductive loss Interfacial polarization Impedance matching 

分 类 号：TB34[一般工业技术—材料科学与工程]