High-performance microwave absorption enabled by Co_(3)O_(4) modified VB-group laminated VS_(2) with frequency modulation from S-band to Ku-band  

作　　者：Zehao Huang Junye Cheng Huibin Zhang Yingfei Xiong Zhanxin Zhou Qingbin Zheng Guangping Zheng Deqing Zhang Maosheng Cao 

机构地区：[1]School of Materials Science and Engineering,Qiqihar University,Qiqihar 161006,China [2]Department of Materials Science and Engineering,Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China [3]School of Science and Engineering,The Chinese University of Hong Kong,Shenzhen 518172,China [4]School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China

出　　处：《Journal of Materials Science & Technology》2022年第12期155-164,共10页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(51772160 and 51977009);China Postdoctoral Science Foundation(Grant No.2020M682029);Regional Joint Fund for Basic Research and Applied Basic Research of Guangdong Province(No.2020SA001515110905)。

摘　　要：High performance microwave absorption(MA)materials especially those with tunable frequency are highly desirable for telecommunication industries and military camouflage in the information era.Herein,we constructed hierarchical heterostructures based on VB-group laminated vanadium disulfide(VS_(2))nanosheets embedded with cobalt tetroxide(Co_(3)O_(4))nanoparticles.The highly dispersed Co_(3)O_(4)nanoparticles generate strong electromagnetic coupling networks that could enhance the loss properties of MA materials.Moreover,the interconnected VS_(2)layered network results in dipolar/interfacial polarization,multiple reflection and scattering favorable for the enhanced MA performance.Impressively,the maximum reflection loss of the VS_(2)/Co_(3)O_(4)hybrids containing 10%Co_(3)O_(4)can reach 57.96 dB at a thin thickness of 1.57 mm,and the bandwidth with an RL value less than-10 dB is as large as 3.5 GHz.The effective MA band could be adjusted in a range of 15.1 GHz(2.9-18 GHz)from S to Ku bands by the increase in thickness from 1.2 mm to 5.5 mm.The results show that the synergistic effect of multiple loss mechanisms and good impedance matching could be the reasons for strong MA capability in nearly all frequency bands,and thus,the high-performance and lightweight MA materials could be developed by the VS_(2)/Co_(3)O_(4)hybrids.

关 键 词：VS2 nanosheets Co_(3)O_(4)nanospheres Hetero-structure Microwave wave absorption 

分 类 号：TB34[一般工业技术—材料科学与工程]