Optimizing the electromagnetic wave absorption performance of designed hollow CoFe2O4/CoFe@C microspheres
Ge, Jianwen1; Liu, Shimeng1; Liu, Li1; Cui, Yu2; Meng, Fandi1; Li, Yixing1; Zhang, Xuefeng1; Wang, Fuhui1
Corresponding AuthorLiu, Li(
AbstractWhereas hollow composites present some superiorities like abundant micro interfaces, outstanding impedance matching as the responses of electromagnetic wave (EMW), but versatile designs including crystal transformation, heterogeneous structures and magnetic exchange coupling to further contribution are even not designed or stressed together in previous literatures. In this article, rational design on the hollow CoFe2O4/CoFe@C architecture has been conducted by a sequential process of self-sacrifice by combustion, in-suit polymerization and calcination. Results of morphology observation exhibit that heterogeneous CoFe2O4/CoFe@C composites were generated via crystal transformation from CoFe2O4 to CoFe alloys with encapsulated carbon, together with ultimate growth of crystal particles. As for three carbon-based architectures, relatively low-graphitization carbon layers are favorable for enhancing impedance matching and polarization relaxation, but suppressing the conductive loss essentially. Moderate carbon content endows sample S2 with the maximum magnetic saturation (M-s) of 152.4 emu g(-1). The optimized RL of sample S3 is up to -51 dB with 30 wt% loading, and the effective absorption band (EAB) is of 5.9 GHz at the thickness of 2.17 mm, while 6.0 GHz can be reached at 2.5 mm. Therefore, this hollow multi-interfaces design definitely shed light on novel structure for new excellent absorbers. (c) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordCoFe2O4/CoFe@C Alloying processing Absorption performance Carbon layers
Funding OrganizationNational Natural Science Foundation of China ; Liao Ning Revitalization Talents Program
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[51622106] ; Liao Ning Revitalization Talents Program[XLYC1807076]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000658560600020
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Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLiu, Li
Affiliation1.Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Ge, Jianwen,Liu, Shimeng,Liu, Li,et al. Optimizing the electromagnetic wave absorption performance of designed hollow CoFe2O4/CoFe@C microspheres[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,81:190-202.
APA Ge, Jianwen.,Liu, Shimeng.,Liu, Li.,Cui, Yu.,Meng, Fandi.,...&Wang, Fuhui.(2021).Optimizing the electromagnetic wave absorption performance of designed hollow CoFe2O4/CoFe@C microspheres.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,81,190-202.
MLA Ge, Jianwen,et al."Optimizing the electromagnetic wave absorption performance of designed hollow CoFe2O4/CoFe@C microspheres".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 81(2021):190-202.
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