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Inorganic aluminium precursors in the synthesis of mullite — an investigation

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Abstract

A variety of inorganic aluminium sols were investigated for their reactivity with colloidal silica to form polycrystalline mullite. Nuclear magnetic resonance (NMR) spectroscopy was used on the precursor aluminium sols to ascertain the co-ordination and reactivity of the species present. Differential thermal and thermogravimetric analysis and X-ray diffraction were used to analyse the products of the fired xerogels. Commercial reactants produced diphasic materials with little or no mullite formed at 1000 °C. A monomeric/dimeric sol produced in house however, showed a sharp exotherm at 920 °C and crystalline mullite formation at this temperature.

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Authors and Affiliations

  1. Centre for Catalytic Systems and Materials Engineering, Department of Engineering, University of Warwick, CV4 7AL, Coventry, UK

    A. K. Bhattacharya, A. Hartridge & K. K. Mallick

Authors
  1. A. K. Bhattacharya
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  2. A. Hartridge
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  3. K. K. Mallick
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Bhattacharya, A.K., Hartridge, A. & Mallick, K.K. Inorganic aluminium precursors in the synthesis of mullite — an investigation. J Mater Sci 31, 5551–5554 (1996). https://doi.org/10.1007/BF01159329

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  • DOI: https://doi.org/10.1007/BF01159329

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