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Stoichiometry of the C + SiO 2 Reaction
Author(s) -
Biernacki J. J.,
Wotzak G. P.
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb05964.x
Subject(s) - silicon monoxide , silicon carbide , silicon , stoichiometry , carbon monoxide , thermogravimetric analysis , materials science , amorphous silicon , carbide , amorphous solid , monoxide , chemical engineering , inorganic chemistry , analytical chemistry (journal) , catalysis , chemistry , crystalline silicon , crystallography , metallurgy , organic chemistry , engineering
The reaction of one‐to‐one molar carbon/silica powder mixtures was studied using simultaneous thermogravimetric analysis and mass spectroscopy with crystalline and amorphous silica. Reaction proceeded via a two‐stage path in which there are at least three identifiable competing global reactions. During the first stage, silicon carbide is formed along with small amounts of silicon monoxide. The most likely reaction path during this stage is the following: SiO 2 ( s ) + C( s ) → SiO( g ) + CO( g ); SiO( g ) + 2C( s ) → SiC( s ) + CO( g ). The second stage consists of reactions between silica with silicon carbide which form silicon monoxide and, where conditions permit, may also form silicon metal. The major reaction during this stage is 2SiO 2 ( g ) + SiC( s ) → 3SiO( g ) + CO( g ).