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Processing of spodumene-modified mullite ceramics

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Abstract

The use of β-spodumene (Li2O·Al2O3·4SiO2) has been investigated as a liquid-phase sintering aid for the densification of mullite processed from fumed silica and ESP (alumina) dust. XRD, DTA, SEM and Vickers indentation were used to characterize the effect of spodumene on the phase relations, sintering behaviour, microstructure and mechanical properties of mullite. The results show that the presence of spodumene significantly reduces the porosity, improves the sintering behaviour and enhances the formation of mullite at 1550 °C. Spodumene-modified mullite ceramics also have better physical and mechanical properties.

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Authors and Affiliations

  1. Materials Research Group, School of Physical Sciences, Curtin University of Technology, GPO Box U1987, Perth, WA, 6001, Australia

    I. M Low

  2. School of Applied Chemistry, Curtin University of Technology, GPO Box U1987, Perth, WA, 6001, Australia

    E Mathews

Authors
  1. I. M Low
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  2. E Mathews
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  3. T Garrod
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  4. D Zhou
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  5. D. N Phillips
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  6. X. M Pillai
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Low, I.M., Mathews, E., Garrod, T. et al. Processing of spodumene-modified mullite ceramics. Journal of Materials Science 32, 3807–3812 (1997). https://doi.org/10.1023/A:1018679808095

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