Novel composite of Co/carbon nanotubes: Synthesis, magnetism and microwave absorption properties

被引：73

作者：

Zheng, Zhong ^{[1
]}

Xu, Bo ^{[2
]}

Huang, Lu ^{[1
]}

He, Li ^{[1
]}

Ni, Xiaomin ^{[3
]}

机构：

[1] Univ Sci & Technol China, Dept Elect Sci & Technol, Hefei 230027, Anhui, Peoples R China

[2] Inst Elect Engn, Key Lab Infrared & Low Temp Plasma Anhui Province, Hefei 230027, Anhui, Peoples R China

[3] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230027, Anhui, Peoples R China

来源：

SOLID STATE SCIENCES | 2008年 / 10卷 / 03期

关键词：

composite; cobalt; carbon nanotubes; coercivity; microwave absorption;

D O I：

10.1016/j.solidstatesciences.2007.09.016

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Composites of flowery hexagonal close-packed (hcp) cobalt crystallite covered with multi-wall carbon nanotubes (MWCNTs) were fabricated in high yield via a simple catalytic pyrolysis method. A series of characterizations including X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) revealed that MWCNTs grew on the surface of the cobalt flowers, which possibly followed a bottom-growth model. Thus-prepared Co/CNT composites not only exhibited much higher coercivity (772 Oe) than that of the initial pure cobalt flowers (308 Oe), but also showed much-enhanced microwave absorption than that of pure Co flowers or CNTs. The enhancement mechanism was investigated on the basis of the magnetic properties of Co/CNT composite and electromagnetic theory. (c) 2007 Elsevier Masson SAS. All rights reserved.

引用

页码：316 / 320

页数：5

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