Glass transition and crystallization of 0.8TeO(2)+0.2CdF(2) glass

Tatar D., OEVECOGLU M. L., OEZEN G., ERIM B.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, cilt.29, sa.2, ss.329-335, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Sayı: 2
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.jeurceramsoc.2008.03.042
  • Dergi Adı: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.329-335
  • Anahtar Kelimeler: Tellurite glass, Microstructure, Thermal properties, 0.25 MOL GLASSES, THERMAL-PROPERTIES, MICROSTRUCTURAL CHARACTERIZATION, OXYFLUORIDE GLASSES, TELLURIUM DIOXIDE, SYSTEM, BEHAVIOR, PROBABILITIES, GAMMA-TEO2, DYNAMICS
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

The scope of this study is to determine the different crystal formation in the 0.8TeO(2) + 0.2CdF(2) glasses heated with different rates to various annealing temperatures by using differential thermal analysis (DTA), X-ray diffraction (XRD) techniques, chemical analysis, optical microscope and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS). Different number of exothermic peaks were observed indicating the different crystallization or the transition of certain phases in the glass structure as the heating rate of DTA scans varied from 5 to 20 degrees C/min. On the basis of the XRD investigations alpha-TeO(2), gamma-TeO(2) and CdTe(2)O(5) crystalline phases were determined. SEM/EDS investigations of all the glasses revealed the presence of different phases correlated with the XRD analysis. (C) 2008 Elsevier Ltd. All rights reserved.