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Thread: graphite attacking alumina or silica at over 3800 k

  1. #1 graphite attacking alumina or silica at over 3800 k 
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    Mar 2014
    Hello everyone,

    I got a question about the chemical stability of silica or alumina in the presence of extremely hot graphite (hot enough to dissociate graphite under normal pressures). I understand that silica is reduced with carbon into silicon all the time. However the links I read do not say that the graphite form of carbon is used for this job. Is the carbon-carbon covalent bond strong enough to resist forming oxides or monoxides in the presence of silica or alumina? What if the system was under enough pressure to liquefy pure carbon (say about 500 bar)?


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