A study has been made on the effects of the amount of silicon nitride and graphite on the physicomechanical properties of Al2O3–Si3N4–C composites for lining purposes. Adding 2.5–5.0 wt.% silicon nitride and 0.5 wt.% reactive alumina improves the properties, raises their apparent density, and increases the mechanical strength, while reducing the open porosity. Optimized compositions have been determined for refractory materials of Al2O3–Si3N4–C composition, and it has been found that to attain the higher values of physicomechanical properties the amount of graphite should constitute 5–10 wt.%.
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Translated from Novye Ogneupory, No. 10, pp. 50–53, October 2009.
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Angolenko, L.A., Semchenko, G.D., Starolat, E.E. et al. Physicomechanical properties of refractory Al2O3–Si3N4–C materials with ACPC. Refract Ind Ceram 50, 387–390 (2009). https://doi.org/10.1007/s11148-010-9220-x
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DOI: https://doi.org/10.1007/s11148-010-9220-x