Affiliation:
1. Burapha University
2. Nakhon Pathom Rajabhat University
Abstract
In this work, the subbituminous fly ash (SFA) in Thailand has been investigated for their compositions and crystal structures. Borosilicate glasses were prepare from SFA , B2O3, Na2O and various concentration of Fe2O3 by melt quenching technique. The results have shown that the chemical composition comprised with SiO2, Al2O3 and Fe2O3. The crystal structures of SFA were raised of mullite and quartz phases. The density and refractive index values of glasses were found to increase with increasing of Fe2O3 concentrations. The hardness values have been decreased with increasing of Fe2O3 content. The absorption spectra are corresponding to ferric and ferrous ions in wavelength of 440 nm and 1,050 nm and the color of glasses are green to yellow.
Publisher
Trans Tech Publications, Ltd.
Reference13 articles.
1. Y. Mei, G. Zhixing, D. Yinsheng, X. Xueling, Q. Kehui, L. Jianping, L. Junfeng, Preparation of CaO–Al2O3–SiO2 glass ceramics from coal gangue, International Journal of Processing 102-103 (2012) 112-115. Mineral.
2. S. Zhou, Y. Chen, W. Zhang, Prediction of compressive strength of cement mortars with fly ash and activated coal gangue, Journal of Southeast University 4 (2006) 549-552.
3. M.S. Sabry, S.H. Peter, T.D. Christos, Opportunities and challenges in the use of coal fly ash for soil improvements – A review, Journal of Environmental Management 145 (2014) 249-267.
4. P. Fei, L. Kaiming H. Anmin, S. Hua, Nano-crystal glass-ceramics obtained by crystallization of vitrified coal fly ash, Fuel 83 (2004) 1973–(1977).
5. W. Rachniyom, Y. Ruangtaweep, J. Kaewkhao, K. Phachana, Effects of Na2O on borosilicate glasses prepared from coal fired ash, Advanced Materials Research 979 (2014) 271-274.