Browse > Article
http://dx.doi.org/10.6111/JKCGCT.2010.20.1.053

Effect of modifiers on the properties of glass-ceramics containing coal bottom ash  

Kang, Seung-Gu (Department of Advanced Materials Engineering, Kyonggi University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.20, no.1, 2010 , pp. 53-57 More about this Journal
Abstract
The influence of CaO addition on the crystallization temperature, crystal types, and microstructure of L-A-S ($Li_2O-Al_2O_3-SiO_2$) glass-ceramics system fabricated from a coal bottom ash, produced at thermal power plant, was studied. The glass transition and crystallization temperatures were shifted to the higher temperature position with increasing CaO content in a non-isothermal analysis using a DTA. The major crystalline phases of L-A-S glass-ceramics system produced were identified as ${\beta}$-spodumene ($LiAlSi_2O_6$) and eucryptite ($LiAlSiO_4$). The glass-ceramics showed a bulk and surface crystallization behavior at a time. With increasing CaO content, the ${\beta}$-spodumene peak in XRD increased and some CaO-related phases were formed. The surface crystal grown from the exterior to the center in glass-ceramics showed various shapes by amount of CaO added. Some cracks were generated at the glass-ceramics containing CaO above 9 wt% due to the mismatch of thermal expansion coefficients between a ${\beta}$-spodumene and CaO-related crystal phases.
Keywords
L-A-S; Coal bottom ash; CaO; Glass-ceramics; ${\beta}$-spodumene;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 S.U. Shin, S. Kumar, T.U. lung and B.W. Shin, "The strength and characteristic of PCC bottom ash", J. Kor. Geo-Environ. Soc. 8(2) (2007) 57.
2 D.U. Lee and Y.S. Kim, "A study on the strength properties of concrete containing bottom ash as a part of fine aggregate", J. Architectural Institute of Korea 22(6) (2006) 79.
3 Carlos P. Bergmann, "Sinterability study of ceramic bodies made from a mixture of mineral coal bottom ash and soda-lime glass cullet", Waste Manage Res. 25 (2007) 77.   DOI   ScienceOn
4 S.G. Kang, "Microstructure of glass-ceramics made from bottom ash produced at a thermal power plant", Kor. J. Mater. Res. 19(2) (2009) 95.   DOI
5 Y. Masauki, "Glasses", Translated to Korean by W.H. Kang, et al., Chungmoongak, Korea (2202) 34.
6 M.F. Berard and D.R. Wider, Fundamentals of Phase Equilibria in Ceramic Systems, p.25, R.A.N., USA (1990).
7 C.T. Kniess, C.D.G. de Borba, E. Neves, N.C. Kuhnen and H.G. Riella, "Obtaining and characterizing $Li_2O-Al_2O_3-SiO_2$ glass-ceramics using bottom ash as raw material", Interceram 51 (2002) 140.
8 S.J. Jang and S.G. Kang, "Microstructural analysis for hybrid materials composing of nepheline crystal and glass matrix fabricated from coal bottom ash", J. Ceram. Proc. Res. 10(1) (2009) s59.