新型炭材料2002，Vol.17Issue(4)：67-70,4.
包覆纳米镍粒子的碳纳米管磁性研究(英文)
MAGNETIC PROPERTIES OF CARBON NANOTUBES ENCAPSULATING NANOSIZE D NICKEL PARTICLES
摘要
Abstract
Multi-walled carbon nanotubes were synthesized by the catalytic chemical vapor decomposition method, and a binary aerogel with a 1.20∶1 nickel-silica weight ratio was used as catalyst, which was prepared by the sol-gel supercritical fluid drying method. The synthesis of carbon nanotub es was conducted in a quartz tube furnace. The catalysts in the quartz boat were heat-treated to the required temperature under nitrogen atmosphere and reduced by flowing hydrogen for 30min. Then the gas mixture of hydrogen and methane was introduced into the furnace and pyrolyzed for 30min～60min. Finally, the product obtained was cooled to room temperature under a nitrogen atmosphere. The samples were characterized by XRD, SEM, TEM, HRTEM, Raman spectra and susceptib ility tests. The results showed that the pyrolytic product was composed of multi -walled carbon nanotubes and nanosized nickel particles, which were encapsulated at the tip of the carbon nanotubes. Magnetic analysis showed that the carbon nanotubes encapsulating nickel had a specific saturation magnetization of 0.66A ·m2·kg-1 and a coercivity of 20157A·m-1.关键词
碳纳米管/磁性能/微观结构Key words
Carbon nanotubes/Magnetic properties/Microstructure分类
通用工业技术引用本文复制引用
雷中兴,李轩科,汪厚植,洪学勤,陈家唯..包覆纳米镍粒子的碳纳米管磁性研究(英文)[J].新型炭材料,2002,17(4):67-70,4.基金项目
武汉科技计划项目(20011007088) （20011007088）
