纳米钴-磷粒子/碳纳米管的制备与磁性能
Preparation of Co-P Nanoparticles/Carbon Nanotubes and Their Magnetic Property
摘 要
以苯为碳源、二茂铁为催化剂在竖式炉中用流动法连续制备外径为40~100 nm、长度为50~1 000 μm的碳纳米管;碳纳米管经过预处理后,采用化学镀工艺在表面均匀镀覆纳米钴-磷微粒并进行了热处理,用TEM、XRD、磁强计等方法对纳米钴-磷/碳纳米管进行了表征.结果表明:钴-磷微粒的粒径为15~40 nm,形成的是磷在钴晶粒中的置换固溶体,但晶体结构不完整;未经热处理的钴-磷/碳纳米管呈现很大的矫顽力,达到1.332×106 A·m-1,经过400 ℃热处理后,有Co2P的新物相析出,其磁性能表现为矫顽力减小、磁化率增大.
化学镀
钴合金
磁性能
carbon nanotube
electroless plating
cobalt alloy
magnetic property
Abstract
Carbon nanotubes were prepared by catalytic decomposition of benzene using floating transition method with ferrocene as catalyst.The carbon nanotubes were straight with diameter 40-100 nm and length 50-1 000 μm.Co-P nanoparticles were deposited on the carbon nanotubes by electroless process after pretreatment.The Co-P/carbon nanotubes were characterized by TEM,XRD and magnetometer.The results show that the structure of particles was sosoloid of phosphorus dissolved in microcrystalline cobalt matrix with the size of 15-40 nm.The coercive force of carbon nanotubes coated with Co-P was very high,reached to 1.332×106 A·m-1.After heat-treatment at 400 ℃,the new phase of Co2P was formed.Correspondingly,the coercive force decreased and the magnetic susceptibility increased respectively.
中图分类号 TB383
所属栏目
基金项目 北京市科技新星计划资助项目(H020821280120)
收稿日期 2007/6/13
修改稿日期 2007/8/25
网络出版日期
作者单位点击查看
备注卢振明(1975-),男,湖北天门人,工程师,硕士.
引用该论文: LU Zhen-ming,ZHAO Dong-lin,SHEN Zeng-min. Preparation of Co-P Nanoparticles/Carbon Nanotubes and Their Magnetic Property[J]. Materials for mechancial engineering, 2008, 32(4): 62～65
卢振明,赵东林,沈曾民. 纳米钴-磷粒子/碳纳米管的制备与磁性能[J]. 机械工程材料, 2008, 32(4): 62～65
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参考文献
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【3】宋勇,王成福,应美芳.镀Ni碳纤维增强铅合金复合材料的制备工艺[J].机械工程材料,1989,13(3):43-46.
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【5】黄鑫,王贵青,贺子凯.石墨粉表面化学镀铜工艺研究[J].机械工程材料,2002,26(11):33-35.
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【11】陈树川,陈凌冰.材料物理性能[M].上海:上海交通大学出版社,1999:100-132.
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