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On the formation of mullite from kandites

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Abstract

Data are presented that support the explanation of the ∼980° C differential thermal analysis (DTA) exotherm of kandites in terms of transitional mullite (premullite) formation. The evolution of this material towards final 3∶2 mullite takes place with change in the tetrahedral aluminium/octahedral aluminium ratio, as evidenced by IR spectroscopy. The so-called mullite peak at 1250° C is shown to disappear when soaking experiments are carried out at lower temperatures, indicating that it is an effect of the dynamical character of DTA techniques.

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Moya, J.S., Serna, C.J. & Iglesias, J.E. On the formation of mullite from kandites. J Mater Sci 20, 32–36 (1985). https://doi.org/10.1007/BF00555895

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  • DOI: https://doi.org/10.1007/BF00555895

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