Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 22, Issue 11, Pages 1775-1782Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0955-2219(01)00506-4
Keywords
anorthite; cordierite; glass ceramics; microstructure-final; mullite; porosity; sintering
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Microstructural changes, porosity evolution and properties of cordierite based composites have been studied as a function of cordierite-anorthite ratio in modelled ceramic systems. The model systems were composed of alkaline-earth-aluminosilicate glass powder, kaolin, alumina and magnesite. Suitable densification levels of investigated compositions are attained in a narrow temperature range and relatively high residual porosity levels are observed. These features were attributed to the role of the liquid phase during high temperature sintering. Cordierite, anorthite or mixtures of each with mullite are the formed crystalline phases when maximum densification levels are achieved. Their properties are correlated to the processing route and to the composition of sintered materials. Control of the porous structure through manipulation of heating rate was found feasible and easy to implement. (C) 2002 Elsevier Science Ltd. All rights reserved.
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