Preparation, optical, and thermal stability of Tb 3+ ‐doped glass ceramics containing Al 4 Ti 2 SiO 12

Abstract The Tb 3+ ‐doped transparent glass ceramics containing Al 4 Ti 2 SiO 12 crystal are synthesized by the melt‐solid‐crystallization method. The optimal heat treatment conditions for the glass ceramic samples are determined to be 750°C, 1.5 h based on differential scanning calorimeter, X‐ray diffractometer, scanning electron microscope, and light transmittance curve. The luminescence properties of the glass ceramics samples are characterized by a fluorescence spectrometer. The emission spectrum revealed that the dominant emission is green attributed to Tb 3+ , the optimal doping concentration is 0.3%. And the thermal quenching activation energy of 0.3% Tb 3+ ‐doped glass ceramics is 0.2554 eV, while the relative sensitivity is 1.50% K −1 at 298 K and the absolute sensitivity is 2.27×10 −2 K −1 at 418 K through variable temperature fluorescence spectroscopy test and a series of calculations. These findings demonstrate the excellent stability and temperature sensitivity of glass ceramics, thereby highlighting their potential for use in green lighting and temperature sensing applications.