Electromagnetic wave absorbing properties of multi-walled carbon nanotube/cement composites

被引：121

作者：

Wang, Baomin ^{[1
]}

Guo, Zhiqiang ^{[1
]}

Han, Yu ^{[1
]}

Zhang, Tingting ^{[1
,2
]}

机构：

[1] Dalian Univ Technol, Sch Civil Engn, Dalian 116024, Peoples R China

[2] Univ London Imperial Coll Sci Technol & Med, Dept Civil & Environm Engn, London SW7 2AZ, England

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2013年 / 46卷

基金：

中国国家自然科学基金;

关键词：

Multi-walled carbon nanotubes; Cement composites; Wave absorption; Reflectivity; INTERFERENCE SHIELDING EFFECTIVENESS; FLY-ASH; CEMENT; ADMIXTURE; FIBERS;

D O I：

10.1016/j.conbuildmat.2013.04.006

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The electromagnetic wave absorbing properties of multi-walled carbon nanotube (MWCNT)/cement composites were studied. The influence of the MWCNT content and sample thickness on the electromagnetic wave reflectivity was discussed and analyzed in the frequency ranges of 2-8 GHz and 8-18 GHz. When the MWCNT content is 0.6 wt.%, the cement mortar sample with a thickness of 25 mm can remarkably absorb electromagnetic waves close to the absorbing peaks in the frequency range of 2-8 GHz. The strongest peak with a reflectivity of -28 dB is obtained at 2.9 GHz. The cement mortar sample with a thickness of 35 mm presents beneficial broadband wave absorption performance between 8 and 18 GHz. The addition of 0.9 wt.% MWCNTs can notably enhance the wave absorption performance of the cement mortar and make the bandwidth below -10 dB reach 7.1 GHz in the frequency range of 8-18 GHz. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：98 / 103

页数：6

共 26 条

[1] Use of fly ash as an admixture for electromagnetic interference shielding [J].

Cao, JY ;

Chung, DDL .

CEMENT AND CONCRETE RESEARCH, 2004, 34 (10) :1889-1892

[2] Colloidal graphite as an admixture in cement and as a coating on cement for electromagnetic interference shielding [J].

Cao, JY ;

Chung, DDL .

CEMENT AND CONCRETE RESEARCH, 2003, 33 (11) :1737-1740

[3] Coke powder as an admixture in cement for electromagnetic interference shielding [J].

Cao, JY ;

Chung, DDL .

CARBON, 2003, 41 (12) :2433-2436

[4] OPTIMUM DESIGN OF A SALISBURY SCREEN RADAR ABSORBER [J].

CHAMBERS, B .

ELECTRONICS LETTERS, 1994, 30 (16) :1353-1354

[5] Electromagnetic interference shielding effectiveness of carbon materials [J].

Chung, DDL .

CARBON, 2001, 39 (02) :279-285

[6] Electromagnetic wave absorbing characteristics of carbon black cement-based composites [J].

Dai Yawen ;

Sun Mingqing ;

Liu Chenguo ;

Li Zhuoqiu .

CEMENT & CONCRETE COMPOSITES, 2010, 32 (07) :508-513

[7] Microwave absorbing performances of multiwalled carbon nanotube composites with negative permeability [J].

Deng, Longjiang ;

Han, Mangui .

APPLIED PHYSICS LETTERS, 2007, 91 (02)

[8] Carbon nanotube reinforced composites: Potential and current challenges [J].

Esawi, Amal M. K. ;

Farag, Mahmoud M. .

MATERIALS & DESIGN, 2007, 28 (09) :2394-2401

[9] Investigation of the electromagnetic characteristics of cement based composites filled with EPS [J].

Guan, Hongtao ;

Liu, Shunhua ;

Duan, Yuping ;

Zhao, Yanbo .

CEMENT & CONCRETE COMPOSITES, 2007, 29 (01) :49-54

[10] Cement based electromagnetic shielding and absorbing building materials [J].

Guan, Hongtao ;

Liu, Shunhua ;

Duan, Yuping ;

Cheng, Ji .

CEMENT & CONCRETE COMPOSITES, 2006, 28 (05) :468-474

← 1 2 3 →