Читать книгу Carbon Nanofibers - Группа авторов - Страница 27

Catalytic chemical vapor deposition (CCVD) or simply CVD is the foremost commercial technique for the fabrication of CNF as well as CNT. This is a batch process. This technique also produces CMF known as vapor-grown carbon nanofiber (VGCNF). In this type of process, precursor near its boiling temperature is converted into gas-phase molecules and is transported by some carrier gas to decompose at high temperatures in the presence of a transition metal catalyst kept on a substrate. A subsequent growth of the fiber around the catalyst particles is achieved. The nanofiber diameter depends on the catalyst size. There can be different designs of a CVD unit.