Abstract
The present work aims to obtain glass–ceramic glazes for floor tile applications. In this regard, CaF 2 was gradually replaced by B 2 O 3 in the glass compositions belonging to the CaO–CaF 2 –Al 2 O 3 –SiO 2 system. This substitution led to a noticeable decrease of crystallization peak temperatures and to an alteration of the crystallization trend. In the B 2 O 3 bearing glazes, anorthite and gehlenite were identified as the major and minor crystalline phases, respectively. During concurrent crystallization and sintering based on the fast firing program, glass–ceramic glazes containing 9 weight parts of fluorine and 12 weight parts of boron oxide showed the most desirable sinterability. The optimized glass–ceramic glazes offered acceptable micro-hardness, whiteness and thermal expansion behavior after fast firing heat treatment.
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