Characterization investigations of glass-ceramics developed from Seyitömer thermal power plant fly ash


Erol M., DEMIRLER U., KUCUKBAYRAK S., ERSOY-MERICBOYU A., Ovecoglu M. L.

Journal of the European Ceramic Society, vol.23, no.5, pp.757-763, 2003 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 5
  • Publication Date: 2003
  • Doi Number: 10.1016/s0955-2219(02)00193-0
  • Journal Name: Journal of the European Ceramic Society
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.757-763
  • Keywords: fly ash, glass, glass-ceramic, mechanical properties, CRYSTALLIZATION BEHAVIOR, PHYSICAL-PROPERTIES, SO2 REMOVAL, SORBENTS, VITRIFICATION, NUCLEATION, HYDRATION

Abstract

Glass-ceramic materials were produced from fly ash samples obtained from the Seyitömer thermal power plant in Turkey. Glass samples were crystallized by suitable nucleation and crystal growth heat treatments on the basis of DTA results. The microstructural analysis of glass-ceramic samples were carried out using SEM and XRDtechniques. SEM investigations clearly demonstrated the presence of a tiny crystallized phase dispersed in the microstructure. XRD results revealed that the main crystalline phase was diopside [Ca(Mg,Al)(Si,Al)2O6]. It was observed that the mechanical properties and the thermal expansion coeffecient of the glass-ceramic samples depend only on the amount of the crystalline phase. Furthermore, chemical durability of the produced glass-ceramic samples were high. ©2002 Elsevier Science Ltd. All rights reserved.