Tripathi, Himansu Shekhar and Mukherjee, B and Das, Samir Kumar and Ghosh, Arup and Banerjee, Goutam (2003) Effect of sillimanite beach sand composition on mullitization and properties of Al2O3-SiO2 system. Bulletin of Materials Science, 26 (2). pp. 217-220. ISSN 0250-4707

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Abstract

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.

Item Type:	Article
Uncontrolled Keywords:	Sillimanite; Mullite; Beach sand; Aggregate
Subjects:	Refractories
Divisions:	Refractory
Depositing User:	Subhra Lahiri
Date Deposited:	02 Mar 2012 06:20
Last Modified:	02 Mar 2012 06:20
URI:	http://cgcri.csircentral.net/id/eprint/1106

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