Abstract
Thermal processing of a rice husk sol in air at T≥750°C leads to the phase transformation of amorphous silicon dioxide (SiO2) into crystobalite (type B samples). Thermal treatment of the same sol at T≈ 1400 °C in a closed graphite crucible leads to the formation of a mixture comprising hexagonal SiC phases and graphite (type A samples). Unannealed type A samples showed high refractory properties, being stable up to 1650°C. Using kaolin binder in silicon carbide articles leads to a decrease in the material refractoriness.
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Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 29, No. 6, 2003, pp. 7–13.
Original Russian Text Copyright © 2003 by Adylov, Faiziev, Paizullakhanov, Mukhsimov, Nodirmatov.
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Adylov, G.T., Faiziev, S.A., Paizullakhanov, M.S. et al. Silicon carbide materials obtained from rice husk. Tech. Phys. Lett. 29, 221–223 (2003). https://doi.org/10.1134/1.1565639
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DOI: https://doi.org/10.1134/1.1565639