首页|Effects of degree of graphitization of C shells on microwave absorption of Fe-C core-shell nanoparticles with excellent comparability

Effects of degree of graphitization of C shells on microwave absorption of Fe-C core-shell nanoparticles with excellent comparability

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In this study,Fe-C core-shell nanoparticles with identical metal core sizes and C shell thicknesses but varying degrees of graphitization of C shells were fabricated using metal-organic chemical vapor depo-sition and subsequent annealing.Due to the identical metal core,these nanoparticles exhibite a similar permeability,but significantly varying permittivity depending on how much C shells have been graphi-tized.It was discovered that proper graphitization of Fe-C nanoparticles annealed at 1350 ℃ can pro-duce excellent microwave absorption(MA),decent dielectric loss tangent in high frequency region,and moderately strong dielectric loss and attenuation properties.Furthermore,the threshold value of 1/ω is discovered to be a crucial parameter in the theoretical analysis of nonlinear behavior of polarization loss,and thus MA performance of the nanoparticles.This research offers a useful method for creating metal-C nanoparticles with various levels of C shell graphitization.It also provides a clear answer to the crucial question of how the level of C shell graphitization affects the MA performance of metal-C nanoparticles.These results may serve as a reference for the development and mechanism analysis of highly effective metal-C based absorbers.

Fe-CC shellGraphitization degreeMicrowave absorption

Daitao Kuang、Yonghua Tian、Weijie Duan、Zhikun Tian、Xiaogang Sun、Shiliang Wang

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School of Computational Science and Electronics,Hunan Institute of Engineering,Xiangtan 411104,China

School of Physics and Electronics,Central South University,Changsha 410083,China

College of Mechanical Engineering,Hunan Institute of Engineering,Xiangtan 411104,China

Hunan Provincial Natural Science Foundation of ChinaHunan Provincial Natural Science Foundation of ChinaHunan Provincial Natural Science Foundation of ChinaScientific Research Fund of Hunan Provincial Education DepartmentScientific Research Fund of Hunan Provincial Education Department

2022JJ401212021JJ401532021JJ5010821B065722A0518

2024

10.1016/j.jmst.2023.09.020

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.179(12)
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