Crystallization kinetics of fly ash-based glasses


Erol Taygun M. M. , Kucukbayrak S., Ersoy-Mericboyu A., Öveçoğlu M. L.

EURO CERAMICS VIII, PTS 1-3, vol.264-268, pp.1895-1898, 2004 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 264-268
  • Publication Date: 2004
  • Doi Number: 10.4028/www.scientific.net/kem.264-268.1895
  • Title of Journal : EURO CERAMICS VIII, PTS 1-3
  • Page Numbers: pp.1895-1898
  • Keywords: glass, glass-ceramic, fly ash, crystallization kinetics, NUCLEATION, GROWTH

Abstract

The crystallization behavior and kinetics of fly ash-based glasses were investigated by using DTA and SEM techniques. The crystal growth activation energies were determined by using the Kissinger and Matusita-Sakka equations as 200 and 283 kJ/mol, respectively. The Avrami exponent (n) was calculated by means of Augis-Bennet and Ozawa equations. Calculated values indicated that the crystallization mechanism was a three dimensional bulk process. This result is in well agreement with the cross-sectional SEM investigations.