Crystallization and Optical Properties of Sr_3Al_2O_6-SrAl_2O_4 Eutectic Glass

摘要

Sr_3Al_2O_6-SrAl_2O_4 eutectic glass was prepared by using the aerodynamic levitator equipped with a CO_2 laser device. The prepared Sr_3Al_2O_6-SrAl_2O_4 eutectic glass beads were further heat-treated at temperature from 880 to 980°C. The phase evolution, crystallization behavior, optical transmittance and mechanical properties of the annealed eutectic glass ceramics were investigated. The as-prepared glass is transparent over a wide range from ultraviolet to near-infrared region, and the average in-line transmittance is over 80% in the range of 260-3200nm.There were two crystal phases Sr_3Al_2O_6 and SrAl_2O_4 crystallized from the glass beads. With increasing heat-treatment temperature, the transparency of the samples decreased, and the hardness increased. The prepared Sr_3Al_2O_6-SrAl_2O_4 eutectic glass and glass ceramics may be a promising candidate for the development of photo-luminescence and persistent afterglow materials.