Thermal stability and structural studies in the TeO2–ZnO–MgO–Li2O–Er2O3 glass system

Abstract

Series of (80-x)TeO2-18ZnO-1MgO-1Li2O-xEr2O3 glass system (0.5mol%=x= 2.5mol%) has successfully been made by melt quenching technique. The thermal stability and structure of glass has been investigated by means of TG/DTA and FTIR spectroscopy. The thermal parameters, such as the glass transition temperature (Tg), crystallization temperature (Tc) and thermal stability (Tc-Tg) were determined. It is found that this system provides a wide and stable glass formation in which the glass stability around 97oC-117oC may be obtained. The broad absorption peaks were observed around 657cm-1-671cm-1 and 755cm-1-758cm-1, which correspond to the stretching vibration mode of TeO4 tbp and TeO3 tp, respectively. The absorption peaks around 1600cm-1 and 3400cm-1 are assigned to a stretching vibration of the hydroxyl group participating in the strong metal and hydrogen bonding respectively.