The use of a Saudi kaolinitic clay for the production of glass-ceramic materials

ISSN 1121-7588
G.A. Khater, M.H. Idris
Saudi Geological Survey, Jeddah, Saudi Arabia


Saudi kaolinitic clay from Az-Zabirah area was experimented for the preparation of cheap technical glass-ceramic materials. The kaolinitic clay was about 59 wt% of the batch constituents, depending on the composition. The batches were melted and then casted into glass, which was subjected to heat treatment to induce crystallization. The resulting glass-ceramic materials were mainly composed of ß-eucryptite ss, ß-spodumene ss, hexacelsian and monoclinic celsian, exhibiting ultra-fine grains and uniform texture. It has been found that an increasing content of the celsian phase in the glasses, results in increased bulk crystallization.
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