Please use this identifier to cite or link to this item: http://buratest.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 Materials Processing

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