Densification behaviour of chamotte grog for refractory bricks : mineralogy and microstructure

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Résumé

The paper deal with the densification behaviour of chamotte grog made with raw clay material at
high temperature. The sintering conditions as temperature (1100, 1200, 1300 and 1400°C) temperature time (0.5;
1 and 2hours) have been varied to check the optimal condition to produce grog with better characteristics. The
relationship between the mineralogy, microstructure of grog with its densification parameters have been studied
using X-ray diffraction and scanning electron microscopy. From 1300°C with 1hour as temperature the obtained
grogs are characterized by dense microstructure with some isolated pores. The mineralogy of these grog is
composed essentially bymullite, cristobalite and residual quartz.

Mots-clés

Raw clay, Chamotte grog, densification, mullite, cristobalite