Preparation of β-wollastonite glass-ceramics

beta-Wollastonite glass-ceramics was prepared by using automobile waste glass and waste shell. We solved an environmental problem using automobile waste glass and waste shell. Two different powder mixtures, automobile waste glass and waste shell, were mechanically ground in a disk-type ball mill for 4 h. After milling, the mixtures were pressed into a disk 10 mm in diameter without using binder and then heated to 850degreesC, 950degreesC, and 1050degreesC at a rate of 5degreesC/min for 1 h, respectively. Crystallinity, morphological properties, and chemical composition were observed by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), and dispersive X-ray spectrometer (EDX). beta-Wollastonite and sodium calcium silicate were investigated by XRD. From the results of analysis, at 1050degreesC for 1 h, beta-wollastonite crystals were significantly observed, so we knew that formation of the highest crystallized beta-wollastonite crystal is dependent on suitable heat-treated temperature. Mechanical property investigations were carried out on beta-wollastonite glass-ceramics.