| 摘要 |
PURPOSE:To provide carbon tubes made of a fullerene in high yield. CONSTITUTION:This method for producing carbon tubes is to fill a metal or its compound as a simple substance in the interior of an electrode graphite (3a) or mix the metal or its compound with a readily graphitizable carbon, fill the resultant mixture therein, bake the metal or its compound or the mixture, subsequently use the prepared electrode as a positive pole 3, use high-purity graphite as a negative pole 2, carry out the arc discharge in a vacuum chamber and separate the objective carbon tubes from a deposit formed on the negative pole 2. The metal is a transition metal such as vanadium, lanthanum, hafnium or gadolinium or a compound thereof. Thereby, rodlike or needlelike carbon tubes having 1-5mum outside diameter and >=20mum length or carbon nanotubes having 1-10nm outside diameter are obtained. |
