• G Banerjee

      Articles written in Bulletin of Materials Science

    • Effect of sillimanite beach sand composition on mullitization and properties of Al2O3–SiO2 system

      H S Tripathi B Mukherjee S K Das A Ghosh G Banerjee

      More Details Abstract Fulltext PDF

      Mullite was developed by reaction sintering of sillimanite beach sand and calcined alumina. Two varieties of sillimanite beach sand viz. S and Z having different compositions were selected. Synthesis and properties of mullite were very much dependent on the sillimanite beach sand composition. Presence of higher amount of impurities in the Z-variety of sillimanite sand favours the densification by liquid phase formation. Presence of zircon in Z-variety increases the hardness and fracture toughness. Alumina addition improves the mechanical/thermomechanical properties of the samples. Mullite retains the usual orthorhombic habit of sillimanite. Rounded to sub rounded zirconia dispersed within the mullite matrix of the sample ZA is noticed.

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