MECHANICAL AND CHEMICAL PROPERTIES OF SiO۲-Al۲O۳-CaO-MgO (R۲O) GLASS CERAMICS IN THE PRESENCE OF VARIOUS NUCLEATING AGENTS

Abstract: The application of inexpensive materials such as copper, zinc, lead, iron and steel slag in manufacturing of glass and glass-ceramic products in construction industry, lining materials as anti-corrosion and anti-abrasion coatings in metals and etc, has led to considerable progress in glass technology in recent years. The composition of slag glass-ceramics is mainly located in the SiO۲-Al۲O۳-CaO-MgO system, in which one of the most important problems is the lack of bulk crystallization. To resolve the above-mentioned problem, the crystallization behavior of various compositions containing different nucleating agents Cr۲O۳ , Fe۲O۳ and TiO۲ in the single, double and triple forms were studied by differential thermal analysis (DTA).The precipitated crystalline phases was determined by the X-ray diffractometry and the micro-structural analysis was studies using the SEM micrographs. The three point bending strength, micro-hardness and the chemical resistance of the best composition were determined. According to the results, the resulted glassceramic had a better specification than the stoneware floor tiles and the porcelain one, which are considered as the two important competitors for it.

Keywords:

Glass , Glass Ceramic , Slag Glass Ceramic , Inexpensive Materials.