Crystallization kinetics of new heavy metal oxide glasses within the Sb2O3-Na2O-WO3-PbO system


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Çelikbilek Ersundu M. , Ersundu A. E. , Soltani M. T. , Baazouzi M.

CERAMICS INTERNATIONAL, cilt.43, ss.491-497, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 43
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.ceramint.2016.09.184
  • Dergi Adı: CERAMICS INTERNATIONAL
  • Sayfa Sayıları: ss.491-497

Özet

Crystallization kinetic studies of new quaternary antimonite glasses within the Sb2O3-Na2O-WO3-PbO system were performed by non-isothermal methods using differential scanning calorimetry (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The kinetic parameters n and m which determine crystallization reaction mechanism in glasses were obtained using experimental values of the crystallized volume fraction, x, by applying Ozawa method. Values of n and m were found as 1 indicating surface crystallization which was confirmed by SEM investigations. The values of crystallization activation energy were calculated in the range of 234-272 kJ/mol by using seven different theoretical models. The calculated crystallization activation energy values were associated with the crystallization of cubic crystalline senarmontite phase of Sb2O3.