Macroscopic electromagnetic synergy network-enhanced N-doped Ni/C gigahertz microwave absorber with regulable microtopography  

作　　者：Yuelei Pan Qianqian Zhu Jiahui Zhu Yuhang Cheng Bowen Yu Zirui Jia Guanglei Wu 

机构地区：[1]Institute of Materials for Energy and Environment,State Key Laboratory of Bio-fibers and Eco-textiles,College of Materials Science and Engineering,Qingdao University,Qingdao 266071,China [2]College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China

出　　处：《Nano Research》2023年第7期10666-10677,共12页纳米研究（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.51407134 and 52002196);the Natural Science Foundation of Shandong Province(Nos.ZR2019YQ24 and ZR2020QF084);the 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);the Special Financial of Shandong Province(Structural Design of High-efficiency Electromagnetic Wave-absorbing Composite Materials and Construction of Shandong Provincial Talent Teams(No.37000022P990304116449)).

摘　　要：To achieve excellent electromagnetic wave(EMW)absorption properties,the microstructure design of the absorber is critical.In this work,six kinds of N-Ni/C nanostructures with different morphologies were prepared by one-step hydrothermal method and high temperature carbonization by adjusting the types of nickel salts and reaction solvents.The EMW absorption performance of six different morphologies of N-Ni/C nanostructures was compared and analyzed.Among them,it is found that the nanoflowerlike N-Ni/C composite has excellent dielectric loss and magnetic loss synergistic effect due to its polycrystalline structure,and can obtain excellent EMW absorption performance.The minimum reflection loss value at a thickness of 1.9 mm is-59.56 dB at 16.88 GHz,and the effective absorption bandwidth value reaches 6.0 GHz at a thickness of 2.2 mm.Our research shows that different morphologies and multiple lattice structures of nanostructures with the same composition have a significant influence on EMW absorption performance,which provides new research ideas for developing high-performance EMW absorbing materials.

关 键 词：magnetic metal-carbon binary composition morphology control dielectric loss magnetic loss electromagnetic wave absorption 

分 类 号：TB383[一般工业技术—材料科学与工程]