An experimental and CFD study on gas flow field distribution in the growth process of multi‐walled carbon nanotube arrays by thermal chemical vapor deposition

作者：Mingjie Li, Zhaopeng Xu, Zhaobin Li, Yan Chen, Jingwei Guo, Huimei Huo, Hangyu Zhou, Huichao Huangfu, Zehui Cao, Haiyan Wang · 发表于：Crystal Research and Technology · 年份：2016 · DOI：10.1002/crat.201600104 · 被引用次数：7 · 研究领域：Carbon Nanotubes in Composites、Nanopore and Nanochannel Transport Studies、Thermal Radiation and Cooling Technologies

Multi‐walled carbon nanotube arrays (MWCNTAs) were grown by thermal chemical vapor deposition (TCVD) in a horizontal furnace reactor. The scanning electron microscopy (SEM) results show that MWCNTAs grown on the bottom and the central of the quartz tube are different in one experiment. Moreover, the MWCNTAs grown on the central position are more aligned and longer than those on the bottom. A computational fluid dynamics (CFD) model was employed to investigate the gas flow field impact on the MWCNTAs growth. The results show that gas circulations appear after carrier gas and carbon source are injected into the quartz tube. Because of the existence of gas circulations, the gas flow field at the central of the quartz tube is more stable, which is conducive to the growth of MWCNTAs. The CFD simulation results match well with the experimental data.