| http://www.w3.org/ns/prov#value | - Briefly, the pyrolytic deposition process may be carried out on a furnace wherein, at a suitable pressure, a hydrocarbon gas such as methane, natural gas, benzene, acetylene or the like is thermally decomposed at the surface of a substrate of suitable shape, size, and material, e.g. graphite, heated for instance, by appropriate induction or resistance means, to a temperature between about l500 C.
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