Preparation and enhanced microwave absorption properties of Ni-Co attached single-walled carbon nanotubes and CoFe2O4 nanocomposites

被引：36

作者：

Fang, Y. H. ^{[1
,2
]}

Tang, X. T. ^{[1
,2
]}

Sun, X. ^{[1
,2
]}

Zhang, Y. F. ^{[1
,2
]}

Zhao, J. W. ^{[1
,2
]}

Yu, L. M. ^{[1
,2
]}

Liu, Y. ^{[1
,2
]}

Zhao, X. L. ^{[1
,2
,3
]}

机构：

[1] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China

[2] Inst Low Dimens Carbons & Device Phys, 99 Shangda Rd, Shanghai 200444, Peoples R China

[3] Shanghai Key Lab High Temp Superconductors, 99 Shangda Rd, Shanghai 200444, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2017年 / 121卷 / 22期

基金：

中国国家自然科学基金;

关键词：

ABSORBING PROPERTIES; MAGNETIC-PROPERTIES; RAMAN-SPECTROSCOPY; SHELL THICKNESS; COMPOSITE; LIGHTWEIGHT; NANOPARTICLES; FABRICATION; GRAPHENE;

D O I：

10.1063/1.4984937

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electromagnetism and microwave absorption properties were investigated in the frequency range of 2-18 GHz for the nanocomposites NiCo-SWCNTs/CoFe2O4 consisting of Ni-Co attached single-walled carbon nanotubes (NiCo-SWCNTs) and CoFe2O4 nanocrystals with different ingredient weight ratios. NiCo-SWCNTs were mass-produced by a direct current arc discharge in helium and CoFe2O4 was synthesized by a sol-gel method. Premium microwave absorption properties (mainly in K-u-band, i.e., 12-18 GHz) were obtained due to the appropriate combination of the complex permeability and permittivity resulting from the magnetic nanocrystals and high-crystalline NiCo-SWCNTs. The NiCo-SWCNTs/CoFe2O4 nanocomposites with 15 wt. % NiCo-SWCNTs exhibited the best microwave absorption property, whose reflection loss (RL) value reached -47.9 dB at 14.7 GHz and the absorption bandwidth (RL < -10 dB) was up to 7.1 GHz (from 10.5 to 17.6 GHz) with a matching thickness of only 1.8 mm. Our results indicate that the studied nanocomposite could be used as a promising candidate for lightweight microwave absorption materials. Published by AIP Publishing.

引用

页数：8

共 51 条

[1] Microwave and mechanical properties of quartz/graphene-based polymer nanocomposites [J].