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Título : Mullite formation kinetic from a porcelain stoneware body for tiles production
Autor : Romero, Maximina, Martín-Márquez, Jorge, Rincón López, Jesús María
Palabras clave : Mullite
Porcelain stoneware
Growth kinetics
DTA analysis
Ceramic tile
Fecha de publicación : 2006
Editor: Elsevier
Resumen: 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 622 kJ mol-1 respectively. The growth morphology parameters n and m are both about 1.5 indicating that bulk nucleation is dominant in mullite crystallization 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 x 1022 s-1.
ISSN: 0955-2219
Citación : Journal of the European Ceramic Society 26 (2006) 1647–1652
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