Effect of Erbium(III) Oxide Addition on Thermal Properties and Crystallization Behavior of Some Zinc-Borate Glasses

摘要

The effect of replacing B_2O_3 with Er_2O_3 on the thermal properties and crystallization behaviour of B_2O_3-ZnO glasses were investigated by Differential Thermal Analysis (DTA) and X-ray Diffraction Analysis (XRD) measurements. DTA measurements reveal that the temperature of vitreous transition and the glass stability increase with the increasing in concentration the erbium ions added in the samples. The fragility index of the glasses increases also, when the dopant concentration from the studied samples increases. The glass was obtained from kinetically strong-glass-forming liquid (KS type glass). The most stable sample from the thermal point of view seems to be the sample that contains 10 mol% of Er_2O_3. The XRD patterns of the heat-treated samples at 860°C show new crystalline phases that contain erbium when the concentration of Er_2O_3 in the samples is higher than 3 mol%.