| Conditions of carbon deposition via break-down of ethyl alcohol
during its evaporation out of ethoxysilanol gels were studied. In the
heat-treatment step for gel-glass conversion, the heating rate in the
temperature range of 150°-200°C was found to be critical for the
decomposition of alcohol and deposition of carbon. It was inferred
from the obtained information that the break-down reaction of
alcohol, occurring in this temperature range, was an initiating,
rather than a precursory step of carbon formation. Some possible
break-down reactions were enumerated and one of the likely routes
to carbon formation was indicated. |
