Patent ID: 7704481
Filing Date: 2010-04-27
Classification: B82Y,D01F

Abstract:
1. A method for producing vapor-grown carbon fibers having a diameter of 10 nm to 150 nm, consisting essentially of contacting a carbon compound with a catalyst and/or a catalyst precursor compound in a heating zone to produce carbon fibers in a vapor phase, wherein the carbon compound is a combination of at least one compound selected from compounds in the following Group (a) and at least one compound selected from compounds in the following Group (b): Compound of Group (a): Compound of Group (b): the ratio of the number of atoms of an element as the catalyst in raw materials to the number of all carbon atoms is: the compound of Group (a) and the compound of Group (b) satisfy the condition: and the residence time in a temperature region of 600° C. or more is 30 seconds or less.