Phase Analysis of Bio-Based Derived Tricalcium Disilicate From 2CaO:1SiO 2 By X-ray Diffraction

• Published in: Journal of physics. Conference series 2021-12, Vol.2129 (1), p.12054
• Main Authors: Yunus, Siti Nur Hazwani, Fhan, Khor Shing, Johar, Banjuraizah, Adzali, Nur Maizatul Shima, Jakfar, Nur Hazlinda, Meng, Cheng Ee
• Format: Article
• Language: English
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/2129/1/012054

In this paper, tricalcium disilicate was formed from dicalcium silicate compound powder, synthesised via a mechanochemical technique using a stoichiometric 2CaO:1SiO 2 . Compound CaO and SiO 2 were derived from the bio-waste of eggshell and rice husk at the calcination temperature of 900°C and 800°C, respectively. The dicalcium disilicate powder was sintered for 2 hours at different temperatures ranging from 1150°C to 1350°C. Using X-ray diffraction with Rietveld analysis, it was found that the amount of tricalcium disilicate with monoclinic (beta) crystal structure increases on sintering temperature at the expense of dicalcium silicate. The complete formation of single-phase tricalcium disilicate began at a sintering temperature of 1300°C. The effect of sintering temperatures on the crystallisation and phase transition of dicalcium silicate is reported. The size of crystallites depends on the sintering temperature. The finding of this study rebound to the benefit of society by reducing the risk-off pollution cause by accessive redundant bio-waste eggshell and rice husk and also reduced the amount of CaO and SiO 2 used in the fabrication of Ca 3 Si 2 O 7 .