Of course, in an oxidizing atmosphere, at about 1000, SiC decomposes according to the scheme of 2SIC + 3O2 = 2SiO2 + 2CO, however the quartz SiO2 is fire resistance in itself (approximately1700) and the final fire resistance will depend on the composition
of the remaining 70%. If this, for example, magnesian refractory, containing MgO, SiO2, reacted with him, can form a serpentinite MgO SiO2 with fireproof capability of about 1500 oC , or forsterite 2MgO SiO2 with fireproof capability of about 1900 oC
. Bauxite is not desirable, because use is not enriched with bauxite may contain significant amounts of Fe2O3 and SIO2 which reduce refractoriness. Better use corundum with high-alumina cement, fire resistance of at least 1700 oC.