抄録
On a ceramic substrate etched chemically or a substrate with crystalline surface, carbon fibers have been obtained by thermal decomposition in a range 1100°C_??_1300°C of a mixture of H2 as a carrier gas and vaporized hydrocarbon, such as benzene, toluene and benzine, which are liquids at room temperature. With N2 as the carrier gas, however, no carbon fiber is observed.
By this method, if the partial pressure of hydrocarbon, the amount of carrier gas and the period for thermal decomposition are properly chosen, a large amount of carbon fibers of the width ranging from 7μ to 65μ and the length reaching 8cm can be obtained.
Electron diffraction examination, optical observation and resistivity measurement confirmed that the fibers thus obtained are polycrystalline and are composed of graphite layer parallel to the fiber axis.
Results of this experiment show that the carbon fibers have the same properties in many respects as carbon films deposited in vacuum.
