Please use this identifier to cite or link to this item:
http://bura.brunel.ac.uk/handle/2438/11156
Title: | Kinetic study of crystallisation of sol-gel derived calcia-alumina binary compounds |
Authors: | Zahedi, M Roohpour, N Ray, AK |
Keywords: | Binary compound;C12A7;FTIR;HTXRD;Kissinger equation;Raman spectroscopy |
Issue Date: | 2014 |
Publisher: | Elsevier |
Citation: | Journal of Alloys and Compounds, 582: 277 - 282, (January 2014) |
Abstract: | In-situ High Temperature X-ray Diffraction (HTXRD) and Differential Scanning Calorimetric (DSC) studies were performed on a sol-gel derived binary compound of a calcia-alumina (C12A7) system consisting of calcium oxide (CaO) and aluminium oxide (Al2O3) in a ratio of 12:7 for in situ investigation into the phase transformations under progressively increasing thermal activation from roomerature to 1200 °C. The crystallisation of amorphous samples formulated at roomerature on magnesium oxide (MgO) single crystal (100) substrates was found to be complete on heat treatment at 1100 °C for 3 h. This observation was further supported by independent Fourier Transform Infrared (FTIR) and Raman Spectroscopies. Values of 348 kJ/mol and 375 kJ/mol were estimated from Kissinger plots for activation energies of crystallisation of CaO and Al2O3 constituents, respectively. |
URI: | http://www.sciencedirect.com/science/article/pii/S0925838813018045 http://bura.brunel.ac.uk/handle/2438/11156 |
DOI: | http://dx.doi.org/10.1016/j.jallcom.2013.07.179 |
ISSN: | 0925-8388 |
Appears in Collections: | Wolfson Centre for Sustainable Materials Development and Processing |
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