Abstract
Mullite bonded white fused alumina based castables have been prepared by adding four types of mullite precursors synthesized by mechanochemically processed mixtures consisting of kaolinite with or without heat treatment and AI(OH)3. DTA, TG and IR data of different mullite precursors have been analysed. Apparent porosity, bulk density, cold compressive strength and strength retainment after spelling test of castables have been compared to identify the possible beneficial role of these additives. XRD and SEM studies of some selected castables have been performed to substantiate the effect of mechanochemically processed mullite precursors.
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