Paper Title:
Nucleation and Crystallization of Glass-Ceramics from Coal Fly Ash
  Abstract

The nucleation and crystallization kinetics of glass obtained by melting coal fly ash with additives at 1550°C have been investigated. The optimum heat treatment schedule for the glass was nucleation at 825°C for 60min before crystallization at 962°C for 4h. The activation energy for crystallization of the glass-ceramics, obtained by the DDTA result, was 280.03 kJ/mol, lower than that of glass-ceramics obtained from pure reagents. The low activation energy is caused by impurities in fly ash, serving as nucleation agent. The results of XRD and SEM show that glass-ceramics developed nano-sized spherical wollastonite.

  Info
Periodical
Key Engineering Materials (Volumes 280-283)
Edited by
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Pages
1651-1654
DOI
10.4028/www.scientific.net/KEM.280-283.1651
Citation
F. Peng, K. M. Liang, H. Shao, A. M. Hu, F. Zhou, "Nucleation and Crystallization of Glass-Ceramics from Coal Fly Ash", Key Engineering Materials, Vols. 280-283, pp. 1651-1654, 2005
Online since
February 2007
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$32.00
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