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

被引：14

作者：

Meng, Xiaohuan ^{[1
]}

Zhang, Jian ^{[1
]}

Xiong, Li ^{[1
]}

Zhang, Tao ^{[1
]}

Zhao, Hu ^{[2
]}

Zhong, Bo ^{[1
]}

Xia, Long ^{[1
]}

Huang, Xiaoxiao ^{[3
]}

Wen, Guangwu ^{[3
,4
]}

机构：

[1] Harbin Inst Technol Weihai, Sch Mat Sci & Engn, Weihai 264209, Peoples R China

[2] Univ Manchester, Sch Mat, Manchester M13 9PL, Lancs, England

[3] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China

[4] Shandong Univ Technol, Sch Mat Sci & Engn, Zibo 255049, Shandong, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷 / 17期

基金：

中国国家自然科学基金;

关键词：

Carbon; Fe3O4; nanoparticles; Fe/Fe3O4/C composite microspheres; Electromagnetic wave absorption; CARBON NANOTUBES; DIELECTRIC-PROPERTIES; FACILE SYNTHESIS; GRAPHENE; COMPOSITES; PERFORMANCE; NANOPARTICLES; LIGHTWEIGHT; HYBRID; MICROSPHERES;

D O I：

10.1016/j.ceramint.2018.08.306

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 mu m 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.

引用

页码：21933 / 21941

页数：9

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