Research of crystallization kinetics, luminescence and abnormal thermal quenching behavior of Al2O3–B2O3–SrO glass ceramic

Abstract

Tb³⁺-doped Al₂O₃–B₂O₃–SrO glass was prepared by the melt annealing method, and the crystallization kinetics of the glass was studied by the thermal analysis method. The crystallization activation energy of the glass was calculated by the Kissinger method and the Ozawa method, the values of which were 271.83 ± 8.56 kJ mol⁻¹ and 260.72 ± 8.20 kJ mol⁻¹, respectively. Optical band gap and Urbach energy of Tb³⁺-doped glass and glass ceramic were calculated by absorption spectra. The results indicate that after heat treatment, the optical band gap of the glass ceramic is reduced compared to that of the glass. The emission intensity of Tb³⁺ in the glass ceramic is enhanced compared with that in the glass. Variable-temperature emission spectra show abnormal thermal quenching of Tb³⁺-doped glass and glass ceramic. The results show that Al₂O₃–B₂O₃–SrO glass ceramics doped with Tb³⁺ have high luminescence intensity and can be applied to green light emitting devices and display devices.