摘要
以碳纳米管与液态Fe(CO)5的混合物为催化剂前躯体,加热分解制备出不同Fe/C比的碳纳米管负载铁氧体粒子,并以此为催化剂,采用甲烷催化裂制备出Fe@C/CNT纳米复合粉体.利用XRD,FESEMT和TEM对复合粉体的物相和形貌进行分析,结果表明:纳米复合粉体主要是同碳包覆Fe粒子(Fe@C)和碳纳米管组成,其中的直径在10～250nm之间,包覆层的厚度约5～10nm,并能较好地分散在碳纳米管上.在2～18GHz范围内的电磁参数测试结果表明:制备的复合粉体中Fe/C的比例对材料的电磁参数影响较大.
Using the mixture of carbon nanotubes and iron pentacarbonyl as precursor,the different Fe and C molar ratio of carbon nanotubes supported iron oxide particles were prepared by a pyrolysis reaction as catalysts.The nano-composite powders of Fe@C/CNT were synthesized by the catalytic decomposition of methane over this catalyst.The microstucture and electromagnetic of Fe@C/CNT were characterised by XRD,FESEM,TEM and S parameter vector network analyzer.The results shows that the nano-composite powders mainly consist of 50~250nm carbon encapsulated Fe particles(Fe@C) with carbon walls thickness in 5~10nm and carbon nanotubes(CNT),and their 2~18GHz complex permittivity(ε_r) and complex permeability(μ_r) change with the ratio of Fe and C.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2006年第z1期50-54,共5页
Journal of Materials Engineering
基金
国防重点实验室基金项目(51469020204QT7901)
湖北省教育厅重大项目(2003Z002)
关键词
CCTV
Fe@C
纳米复合粉体
电磁特性
CCVD
Fe@C
nano-composite powders
electromagnetic characteristics
