Crystallization process and luminescence properties of LaBO3 glass ceramics

Abstract

The La2O3–B2O3–SrO glass ceramics containing LaBO3 were prepared by melt crystallization method and doped with Tb3+/Eu3+ for luminescence performance investigation. The heat treatment conditions of the glass ceramics were determined by differential thermal analysis (DTA), X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). The crystallization kinetics parameters such as crystallization activation energy Ec, Avrami index n were calculated by thermal analysis. Emission peaks at 489, 544 nm of Tb3+ and 590, 614 nm of Eu3+ were obtained under excitation at 377 nm. The tunable warm white light emission was obtained by varying the concentration of Eu3+ in Tb3+/Eu3+ co-doped glass ceramics. The temperature-dependent luminescence spectra show that at 150 °C the intensity of the emission peak can still reach more than 85% of the room temperature. Tb3+/Eu3+ co-doped La2O3–B2O3–SrO glass ceramics have high thermal stability and high luminescence properties, which can be applied to white LEDs and display devices.