Phase equilibria and glass formation studies of the (1 - x)TeO2-xCdO system (0.05 <= x <= 0.33 mol) were realized by using differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The samples were prepared by applying a conventional melt-quenching technique at 800 degrees C. The glass formation range of the system was determined as 0.05 <= x <= 0.15 and the sample containing 10 mol% CdO showed the highest glass stability. Crystallization behavior of the TeO2-CdO glasses was investigated and formation and/or transformation of different phases were detected for each crystallization reaction. In order to obtain thermal stability of the system, as-cast samples were heat-treated above all crystallization reaction temperatures at 550 degrees C for 24 h. A binary eutectic: liquid -> TeO2 + CdTe2O5 was detected at 638 4 C. Crystallization behavior of the TeO2-CdO glasses and microstructural characterization of the TeO2-CdTe2O5 system was realized. (C) 2011 Elsevier Ltd. All rights reserved.