Temperature dependent microwave absorption of ultrathin graphene composites

被引:491
作者
Cao, Wen-Qiang [1 ,2 ]
Wang, Xi-Xi [1 ]
Yuan, Jie [2 ]
Wang, Wen-Zhong [2 ]
Cao, Mao-Sheng [1 ]
机构
[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
[2] Minzu Univ China, Sch Sci, Beijing 100081, Peoples R China
关键词
ELECTROMAGNETIC PROPERTIES; CARBON NANOTUBES; X-BAND; PERFORMANCE; NANOCOILS; NANOPARTICLES; PERMITTIVITY; ENHANCEMENT; FABRICATION; LIGHTWEIGHT;
D O I
10.1039/c5tc02185e
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Ultrathin, lightweight graphene composites exhibit high-efficiency microwave absorption at elevated temperatures as well as thermal-stability permittivity. The minimum reflection loss reaches -42 dB and the widest bandwidth covers the entire X-band (-10 dB). More significantly, the composites possess one high-efficiency absorption belt with a value <= -15 dB, as well as two 'islands' of reflection loss of <=-17 dB and -30 dB. These excellent properties arise from the synergistic effect of polarization and conductivity. Our finding demonstrates that ultrathin graphene is a promising microwave absorber for microwave attenuation devices, information security and electromagnetic pollution defense.
引用
收藏
页码:10017 / 10022
页数:6
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