Investigation of Li2O and TiO2 effects on MAS glass-ceramic produced from waste material

Abstract

Among glass-ceramics, MgO-Al2O3-SiO2 (MAS) system occupies an important place due to its good characteristics. In this study, the magnesite waste being an industrial waste was evaluated for the production of MAS glass ceramics and the properties of the glass-ceramics produced were examined. For this purpose, mixtures were prepared using magnesite waste, quartz, kaolin and alumina raw materials according to the chemical composition of cordierite. Furthermore, in the mixtures prepared with the additions of TiO2 and Li2O added as a nucleating agent the effects of these additions on the crystallization temperatures were investigated. Crystallization temperatures of the glass samples were determined by the differential thermal analysis (DTA) and characterized by X-ray analysis (XRD). Subsequently, the glass-ceramic transformation was performed at 1000, 1050, 1100, 1150, and 1200°C for 1, 3, 5 and 10 hours. The products obtained were analyzed using X-ray (XRD) and scanning electron microscope (SEM). In addition, the microhardness of glass-ceramic products and their corrosion resistance in an acidic environment were measured and compared in this study.

Keywords

• crystallization
• differential thermal analysis (dta)
• glass-ceramics
• magnesite waste
• mgo-al2o3-sio2 (mas) system