Crystallisation kinetics of diopside-Ca-Tschermak based glasses nucleated with Cr₂O₃ and Fe₂O₃
by Ashutosh Goel, Dilshat U. Tulyaganov, Ishu Kansal, Essam R. Shaaban, Jose M.F. Ferreira
International Journal of Materials Engineering Innovation (IJMATEI), Vol. 1, No. 1, 2009

Abstract: We report on the crystallisation behaviour and non-isothermal crystallisation kinetic studies of two diopside (CaMgSi₂O₆)-Ca-Tschermak (CaAl₂SiO₆) based glasses nucleated with Fe₂O₃ and Cr₂O₃. The two glasses with compositions corresponding to CaMg_0.75Al_0.5Si_1.75O₆ and Ca_0.9Mg_0.65Li_0.1Al_0.5La_0.1Si_1.75O₆ were prepared by the melt-quenching technique. Structural investigations on the glasses have been made by density measurements, molar volume and infrared spectroscopy (FTIR). Non-isothermal crystallisation kinetic studies have been employed to study the mechanism of crystallisation in all the four glasses. Bulk crystallisation was obtained and augite crystallised out being the primary crystalline phase in both the glasses. Crystallisation sequence in the glasses has been followed by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and FTIR.

Online publication date: Tue, 24-Mar-2009

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