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, cilt.153, ss.418-425, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 153
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.jhazmat.2007.08.071
  • Dergi Adı: JOURNAL OF HAZARDOUS MATERIALS
  • Sayfa Sayıları: ss.418-425

Özet

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. (c) 2007 Elsevier B.V. All rights reserved.