In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

Xiaohuan Meng; Jian Zhang; Li Xiong; Tao Zhang; Hu Zhao; Bo Zhong; Long Xia; Xiaoxiao Huang; Guangwu Wen

doi:10.1016/j.ceramint.2018.08.306

In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

Xiaohuan Meng, Jian Zhang, Li Xiong, Tao Zhang, Hu Zhao, Bo Zhong, Long Xia, Xiaoxiao Huang, Guangwu Wen

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Abstract

Carbon materials have aroused extensive interests for their remarkable electrical properties as electromagnetic wave (EMW) absorption. However, the synthesis of the wide-band electromagnetic wave absorbent is an insuperable challenge for attaining effective refection loss and electromagnetic matching. Herein, a facile method for large-scale synthesis of monodispersed Fe/Fe3O4/C composite microspheres is proposed. The carbon microspheres (1–2 µm in diameter) imbedded with nanosized Fe/Fe3O4 particles (10–20 nm) are uniformly produced by polymerization and carbothermic reduction processes. The products exhibit the minimum refection loss −45.5 dB at 9.4 GHz and a broad bandwidth of 4.1 GHz below −10 dB from 7.8 GHz to 11.9 GHz with a thickness of 3.0 mm. The absorption mechanism indicates a unique deviated Debye dipolar relaxation effect in the absorbing bandwidth.

Original language	English
Journal	Ceramics International
Volume	44
Issue number	17
Early online date	31 Aug 2018
DOIs	https://doi.org/10.1016/j.ceramint.2018.08.306
Publication status	Published - 1 Dec 2018

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In-situ growth of Fe Fe3O4 C hierarchical architectures with wide-band electromagnetic wave absorptionAccepted author manuscript, 852 KBLicence: CC BY-NC-ND

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title = "In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption",

abstract = "Carbon materials have aroused extensive interests for their remarkable electrical properties as electromagnetic wave (EMW) absorption. However, the synthesis of the wide-band electromagnetic wave absorbent is an insuperable challenge for attaining effective refection loss and electromagnetic matching. Herein, a facile method for large-scale synthesis of monodispersed Fe/Fe3O4/C composite microspheres is proposed. The carbon microspheres (1–2 µm in diameter) imbedded with nanosized Fe/Fe3O4 particles (10–20 nm) are uniformly produced by polymerization and carbothermic reduction processes. The products exhibit the minimum refection loss −45.5 dB at 9.4 GHz and a broad bandwidth of 4.1 GHz below −10 dB from 7.8 GHz to 11.9 GHz with a thickness of 3.0 mm. The absorption mechanism indicates a unique deviated Debye dipolar relaxation effect in the absorbing bandwidth.",

author = "Xiaohuan Meng and Jian Zhang and Li Xiong and Tao Zhang and Hu Zhao and Bo Zhong and Long Xia and Xiaoxiao Huang and Guangwu Wen",

year = "2018",

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T1 - In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

AU - Meng, Xiaohuan

AU - Zhang, Jian

AU - Xiong, Li

AU - Zhang, Tao

AU - Zhao, Hu

AU - Zhong, Bo

AU - Xia, Long

AU - Huang, Xiaoxiao

AU - Wen, Guangwu

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Carbon materials have aroused extensive interests for their remarkable electrical properties as electromagnetic wave (EMW) absorption. However, the synthesis of the wide-band electromagnetic wave absorbent is an insuperable challenge for attaining effective refection loss and electromagnetic matching. Herein, a facile method for large-scale synthesis of monodispersed Fe/Fe3O4/C composite microspheres is proposed. The carbon microspheres (1–2 µm in diameter) imbedded with nanosized Fe/Fe3O4 particles (10–20 nm) are uniformly produced by polymerization and carbothermic reduction processes. The products exhibit the minimum refection loss −45.5 dB at 9.4 GHz and a broad bandwidth of 4.1 GHz below −10 dB from 7.8 GHz to 11.9 GHz with a thickness of 3.0 mm. The absorption mechanism indicates a unique deviated Debye dipolar relaxation effect in the absorbing bandwidth.

AB - Carbon materials have aroused extensive interests for their remarkable electrical properties as electromagnetic wave (EMW) absorption. However, the synthesis of the wide-band electromagnetic wave absorbent is an insuperable challenge for attaining effective refection loss and electromagnetic matching. Herein, a facile method for large-scale synthesis of monodispersed Fe/Fe3O4/C composite microspheres is proposed. The carbon microspheres (1–2 µm in diameter) imbedded with nanosized Fe/Fe3O4 particles (10–20 nm) are uniformly produced by polymerization and carbothermic reduction processes. The products exhibit the minimum refection loss −45.5 dB at 9.4 GHz and a broad bandwidth of 4.1 GHz below −10 dB from 7.8 GHz to 11.9 GHz with a thickness of 3.0 mm. The absorption mechanism indicates a unique deviated Debye dipolar relaxation effect in the absorbing bandwidth.

U2 - 10.1016/j.ceramint.2018.08.306

DO - 10.1016/j.ceramint.2018.08.306

M3 - Article

SN - 0272-8842

VL - 44

JO - Ceramics International

JF - Ceramics International

IS - 17

ER -

In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

Abstract

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