Comparison of the properties of glass, glass-ceramic and ceramic materials produced from coal fly ash


Erol M. M. , KUCUKBAYRAK S. , ERSOY-MERICBOYU A.

Journal of Hazardous Materials, vol.153, no.1-2, pp.418-425, 2008 (Journal Indexed in SCI Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 153 Issue: 1-2
  • Publication Date: 2008
  • Doi Number: 10.1016/j.jhazmat.2007.08.071
  • Title of Journal : Journal of Hazardous Materials
  • Page Numbers: pp.418-425
  • Keywords: coal fly ash, glass, glass-ceramic, ceramic, CRYSTALLIZATION, VITRIFICATION, NUCLEATION, BEHAVIOR

Abstract

Glass, glass-ceramic and ceramic materials were produced from thermal power plant fly ash without any additives. X-ray diffraction (XRD) analysis revealed the amorphous phase of the glass sample. Augite phase was detected in the glass-ceramic sample, while the enstatite and mullite phases occurred in the ceramic samples. Scanning electron microscopy (SEM) investigations showed that tiny crystallites homogeneously dispersed in the microstructure of the glass-ceramic sample and elongated crystals formed in the ceramic samples. Density values of the obtained samples are comparable to those of the commercially produced glass, glass-ceramic and ceramic samples. Toxicity characteristic leaching procedure (TCLP) results indicated that the produced samples could be taken as non-hazardous materials. Produced samples showed high resistance to alkali solutions in contrast to acidic solutions. Microstructural, physical, chemical and mechanical properties of the produced glass-ceramic samples are better than those of the produced glass and ceramic samples. © 2007 Elsevier B.V. All rights reserved.