Regulation of pyrolysis methane concentration in the manufacture

Details Regulation of pyrolysis methane concentration in the manufacture Regulation of pyrolysis methane concentration in the manufacture

1984-12-21

1986-01-21

Niebling, John F.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

423448, 423458, C01B 3104, D01F 912

Patent

active

045656843

ABSTRACT:
In a preferred embodiment, graphite fibers are grown on a suitably nucleated ceramic surface by passing a methane gas stream over the surface at an elevated temperature. Initially, the methane concentration in the gas stream is adjusted to between 5 and 15 volume percent to form microscopic carbon filaments. Thereafter, the methane concentration is increased to above 25 volume percent to thicken the filaments into fibers.

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patent: 4391787 (1983-07-01), Tibbetts
Onuma et al., "Carbon Fibers Obtained by Thermal Decomposition of Vaporized Hydrocarbons", Oyo Butsuri, vol. 32, No. 11, pp. 857-863, (1963).
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Baker et al., "The Formation of Filamentous Carbon", Chemistry & Physics of Carbon, vol. 14, pp. 83-165, (1978).
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Oberlin et al., Journal of Crystal Growth, vol. 32, pp. 335-349, (1976).
Katsuki et al., Carbon, vol. 19, pp. 148-150, (1981).

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