Properties of Wollastonite-Reinforced Glass-Ceramics Made from Waste Automobile Glass and Waste Shell

Wollastonite-type glass ceramics were prepared by milling and firing at various temperatures using an automobile waste glass and waste shell as starting materials. Powder mixture ground by disk-type ball mill for 3 hours was pressed into a disk. The pressed specimen was fired at <TEX>$850^{circ}C$</TEX>,<TEX>$950^{circ}C$</TEX> and <TEX>$1050^{circ}C$</TEX> for 1 hour in air. From FE-SEM observation, with an increase of the firing temperature from <TEX>$850^{circ}C$</TEX> to <TEX>$1050^{circ}C$</TEX>, whisker-type phase was grown to about 10 <TEX>$mu extrm{m}$</TEX> in length. Specimen fired at <TEX>$1050^{circ}C$</TEX> showed the formation of well-crystallized whisker-type wollastonite grains and the highest compressive strength.