Stability of the delta-TeO2 phase in the binary and ternary TeO2 glasses

Creative Commons License

Ersundu A. E., Karaduman G., Celikbilek M., Solak N., Aydın S.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, vol.30, no.15, pp.3087-3092, 2010 (SCI-Expanded) identifier identifier


The stability of delta-TeO2 phase was studied in binary TeO2-WO3, TeO2-CdO and ternary TeO2-WO3-CdO glasses. The samples were prepared by heating high purity powder mixtures of TeO2, WO3 and/or CdO to 800 degrees C in a platinum crucible with a closed lid, holding for 30 min and quenching in water bath. Differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques were used to characterize the thermal, phase and microstructural properties of the delta-TeO2 phase. The addition of CdO into the tellurite glasses increased the stability range of the delta-TeO2 phase up to higher temperature values and expanded the compositional delta-TeO2 formation range. The formation of delta-TeO2 phase in the binary systems was observed for samples containing 5-10 mol% WO3 and 5-15 mol% CdO. However, for the ternary TeO2-WO3-CdO system the formation of delta-TeO2 phase was determined in a wider compositional range. (C) 2010 Elsevier Ltd. All rights reserved.