Journal of Materials Science

, Volume 29, Issue 13, pp 3425–3429 | Cite as

Aqueous sol-gel synthesis of mullite powder by using aluminium oxalate and tetraethoxysilane

  • Susanta Kumar Saha
  • Panchanan Pramanik


Gels with the composition of mullite (3Al2O3-2SiO2) were prepared from an aqueous solution of aluminium oxalate and tetraethoxysilane. High-purity stoichiometric mullite powders were produced by calcination of the gel powders with a small exothermic event at 1250 °C. The chemical and structural evolutions were characterized as a function of heat treatment by differential thermal analysis (DTA), thermogravimetric analysis (TGA), X-ray powder diffraction (XRD) and infrared (i.r.) spectroscopy. The composition of mullite varied with the temperature of the heat treatment.


Polymer Aqueous Solution Heat Treatment Thermal Analysis Calcination 
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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • Susanta Kumar Saha
    • 1
  • Panchanan Pramanik
    • 1
  1. 1.Department of ChemistryIndian Institute of TechnologyKharagpur, 721 302, West BengalIndia

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