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2. Kinetic of mullite formation from a porcelain stoneware body for tiles production

Author

Romero, M., Martín-Márquez, J., and Rincón, J.Ma.

Subjects
*MULLITE, *STONEWARE, *TILES, *THERMAL analysis, *NUCLEATION
Abstract

Abstract: The growth of mullite (3Al2O3·2SiO2) in a porcelain stoneware body for tiles production has been investigated using differential thermal analysis (DTA). The activation energy calculated by both isothermal and non-isothermal treatments is 599 and 622kJmol−1, respectively. The growth morphology parameters n and m are both about 1.5 indicating that bulk nucleation is dominant in mullite crystallisation followed by three-dimensional growth of mullite crystals with polyhedron-like morphology controlled by diffusion from a constant number of nuclei. The frequency factor calculated by the isothermal treatment is equal to 8.21×1022 s−1. [Copyright &y& Elsevier]

Published
2006
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