Photoluminescence Properties of Nano-Sized BaO-TiO₂-SiO₂ System-Based Glass-Ceramics Doped with Er₂O₃ and Eu₂O₃

The crystal phase of fresnoite (Ba₂TiSi₂O₈) produced from BaO-TiO₂-SiO₂ (hereinafter referred to as BTS) has nonlinear optical properties and is capable of emitting ultraviolet light. It can also be utilized in various fields, such as optical communications and optoelectronic devices. In this study, Er and Eu were added to BTS-based glass and a glass-ceramic containing a nano-sized fresnoite crystal phase was prepared through an appropriate heat treatment process. The relationships among the type of crystal phase, the microstructure, the light transmittance capabilities and the PL characteristics of the prepared glass-ceramic were analyzed. In the glass-ceramic of BTS doped with Er, 428 nm light was emitted when excitation light with a 268 nm wavelength was applied, while in the glass-ceramic of BTS doped with Eu, 613 nm red light was emitted when excitation light with a wavelength 394 nm was supplied. The produced fresnoite-based glass-ceramic exhibits transparency and luminescence characteristics due to the nano-sized crystal phase. Therefore, it is likely to find use in various fields in the future.