Fe3C/helical carbon nanotube hybrid: Facile synthesis and spin-induced enhancement in microwave-absorbing properties

被引：89

作者：

Tang, Hui ^{[1
]}

Jian, Xian ^{[1
]}

Wu, Biao ^{[1
]}

Liu, Shiyu ^{[1
]}

Jiang, Zhicheng ^{[1
]}

Chen, Xiangnan ^{[2
]}

Lv, Weiqiang ^{[1
]}

He, Weidong ^{[1
]}

Tian, Wei ^{[1
]}

Wei, Yufeng ^{[1
]}

Gao, Yuqi ^{[1
]}

Chen, Tong ^{[1
]}

Li, Gang ^{[3
]}

机构：

[1] Univ Elect Sci & Technol China, Ctr Informat Biomed, State Key Lab Elect Thin Films & Integrated Devic, Ctr Micronano Funct Mat & Devices,Sch Energy Sci, Chengdu 611731, Peoples R China

[2] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Technol Mat, Chengdu 610031, Peoples R China

[3] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China

来源：

COMPOSITES PART B-ENGINEERING | 2016年 / 107卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Helical carbon nanotubes; Fe3O4; nanoparticles; Hybrid nanocrystals; Microwave absorption; WAVE ABSORPTION PROPERTIES; ELECTROMAGNETIC PROPERTIES; COMPLEX PERMITTIVITY; GROWTH-MECHANISM; COMPOSITES; NANOCOMPOSITES; NANOFIBERS; NANOCOILS; NANOPARTICLE; DEPOSITION;

D O I：

10.1016/j.compositesb.2016.09.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Exploring effective microwave absorption materials is always a challenge especially in the relatively low frequency range of 2-8 GHz and broad absorption band. Here we developed a Fe3C/helical carbon nanotube (HCNT) hybrid structures synthesized via catalytic chemical vapor deposition (CCVD) using Fe3O4 nanoparticles as catalyst. The microwave-absorbing characteristics of such hybrid nanomaterials were investigated based on the transmission line theory through the evaluation of the experimental data including complex permittivity and permeability. Considering the reaction temperature range of 400-750 degrees C, the as-prepared hybrid synthesized at 700 degrees C can be adjusted to have effective performance of RL value less than -10 dB in the relatively lower frequency ranged from 2.9 GHz to 9.9 GHz at the thickness range of 2-5 mm. Furthermore, the hybrid in case of 750 degrees C bears bandwidths with RL lower than -10 dB from 7.3 GHz to 18 GHz and the minimum RL is about -21 dB. The observed advantageous reflection loss was attributed to the pronounced impedance match owing to the reasonable synergistic effect between magnetic nanoparticles and HCNTs. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：51 / 58

页数：8

共 49 条

[1] Complex permittivity and microwave absorption properties of a composite dielectric absorber [J].