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.
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
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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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