Effect Of The Nucleating Agents Cr203 And Lif On Crystallizing Phase And Microstructures Of Glass-Ceramics Prepared By Using Some Industrial Wastes

Glass-ceramics in the system diopside-anorthite-orthoclase were prepared using the waste known as the by-pass cement dust in the amount of 36% of the batch constituents. The effects of addition of the nucleating agents Cr203, LiF, and mixtures of them on the crystallizability, phase assemblages, and the resultant microstructures were investigated. Low concentration of Cr203 (0.5wt%) causes volume crystallization and formation of fine-grained microstructures of microcline, anorthite and aluminous pyroxene. Higher concentrations of Cr203 favor formation of leucite and aluminous pyroxene and inhibit crystallization of anorthite.