Abstract
Three different mullite precursors were prepared from Al(OH)3 and silica sol with variation in the calcination temperature of Al(OH)3. These precursors were added to high alumina low cement castable composition to an extent of 6 wt%. The castables were conventionally processed and fired at 1000, 1200 and 1500 °C. Dried and fired castables were characterized for various properties for the comparative study of the effect of different mullite precursors on the castables. No strength degradation was observed at the intermediate temperature due to the formation of mullite phase in the castable matrix.
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