Preparation and properties of soft magnetic composites based on Fe3O4 coated carbon nanotubes

被引：0
|
作者：
Jiang Feng-jing [1 ]
Pu Hong-ting [1 ]
Yang Zheng-long [1 ]
Yin Jun-lin [2 ]
机构：
[1] Tongji Univ, Inst Funct Polymer, Sch Mat Sci & Engn, Shanghai 200092, Peoples R China
[2] Shanghai Key Lab Met Funct Mat Res & Applicat, Shanghai 200092, Peoples R China
来源：
NEW CARBON MATERIALS | 2007年 / 22卷 / 04期
关键词：
soft magnetic particle; carbon nano-tube; Fe3O4; sedimentation stability; magnetorheological;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Carbon nanotube (CNT)/Fe3O4 composites were prepared by depositing Fe3O4 onto CNTs. The morphologies, magnetic properties, sedimentation stability and magnetorheological properties of the composite particles were investigated by transmission electron microscopy, vibrating sample magnetometer, and a viscosimeter with magnetic equipment. The diameter of CNT/Fe3O4 nano-particles is about 60 nm, while that of CNTs is about 20 nm. The average density of the CNT/Fe, 0, nano-particles is about 1.8 g/cm(3), which is only one-fourth of the normal soft magnetic particles based on Fe3O4 or Fe powder. The CNT/Fe,O, composites have a similar magnetic hysteresis loops to that of Fe3O4, indicating the good soft magnetic properties of the composite particles. The saturation induction density (B-s) of the composite particles is 0.21 T, and the coercive force (H-c) is 7.67 kA/m. Magnetorheological fluids based on such CNT/Fe, 0, composites show high sedimentation stability and good magnetorheological properties.
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收藏
页码：371 / 374
页数：4
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