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Hierarchical design of FeCo-based microchains for enhanced microwave absorption in C band

Nano Research 2023年第1期16卷 1773-1778页

作者： Yixuan Han Mukun He Jinwen Hu Panbo Liu Zhongwu Liu Zhonglei Ma Wenbo Ju Junwei Gu Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China School of Physics and Optoelectronics and School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

microwave absorbing materials(MAMs)has been intensively investigated in order to meet the requirement of electromagnetic radiation control,especially in S and C *** this work,FeCo-based magnetic MAMs are hydrothermally synthesized via a magnetic-field-induced *** composition and morphology of the MAMs are capable of being adjusted simultaneously by the atomic ratio of Fe2+to Co2+in the *** hierarchical magnetic microchain,which has a core–shell structure of twodimensional FexCo1−xOOH nanosheets anchored vertically on the surface of a one-dimensional(1D)Co microchain,shows significantly enhanced microwave absorption in C band,resulting in a reflection loss(RL)of lower than−20 dB at frequencies ranging from 4.4 to 8.0 GHz under a suitable matching *** magnetic coupling of Co microcrystals and the double-loss mechanisms out of the core-shell structure are considered to promote the microwave attenuation *** hierarchical design of 1D magnetic MAMs provides a feasible strategy to solve the electromagnetic pollution in C band.

关键词： one-dimensional micromagnets hierarchical structure microwave absorbing material magnetic coupling double-loss mechanisms

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Preparation of bunched CeO_(2) and study on microwave absorbing properties with MWCNTs binary composite

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Particuology 2023年第2期73卷 95-102页

作者： Yingjie Guo Xiangrui Song Sihang Ma Yinghe Qi Xiaotao Yuan Huili Fan School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing100083China

A novel bunched cerium oxide(CeO_(2))was prepared and its binary composite material with multi-walled carbon nanotubes presented an excellent microwave absorbing *** morphology,structure,and absorbing properties of the composite material were *** was found that the minimum reflection loss(RL)of the composite material at 15.79 GHz was−45.7 dB when the thickness was 5.5 *** was worth noting that when the composite material was in the thickness range of 5.0-7.5 mm and the frequency was 11.36-17.77 GHz,the electromagnetic wave RL wasmaterial had a good absorbing effect over a wide thickness *** results of the study contributed to the design and preparation of efficient microwave absorbing materials(MAM)with rare earth oxide composites and their applications,which demonstrated the importance of new composites with special structures in the field of MAM.

关键词： Bunched cerium oxide microwave absorbing material Multi-walled carbon nanotubes

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