Spectroscopic Properties and Phase-separation Effect of Europium-doped Sodium Borosilicate Glasses

摘要

Europium oxide has been doped into sodium borosilicate (NBS) glasses (8Na_2O-32B_2O_3- 60SiO_2- xEu_2O_3) at various concentration levels. The glass raw materials were calcined at 800℃ and melted at 1380℃ and transparent glasses with slightly red color were obtained by quenching the melt in air. Thermal analyses and other experimental results showed excellent glass forming capability with T_g around 480 to 520℃ at various doping concentrations. A typical deformation temperature of the europium-doped NBS glasses is around 570-660℃ with densities around 2.45 to 2.6 g/cm~3. The doped NBS glasses were further heat-treated at 560℃ for phase-separation. Scanning electronic microscopy (SEM), energy dispersive spectroscopy (EDS), thermomechanical analysis (TMA), optical absorption spectrometer and fluorescence emission spectrometer were used to explore properties of the glasses.