Glass forming regions and concentration-dependent luminescence properties of Tb3+-activated tellurium-lutetium-tungsten glasses

The glass-forming regions of tellurium-gadolinium-tungsten ternary system prepared at 1000 degrees C for 60 min were firstly determined. To improve density, the full replacement of lutetium for gadolinium to form Tb3+-activated tellurium-lutetium-tungsten glasses with the composition of 64TeO(2)-20WO(3)(16-y)Lu2O3-yTb(2)O(3) were designed for scintillation application. The concentration-dependent optical properties of Tb3+-activated tellurium-lutetium-tungsten glasses were fully investigated by transmittance, excitation and emission spectra, together with the luminescence decay curves. The energy transfer mechanism was discussed according to Huang's rule. The optimized 4 mol% Tb2O3 activated tellurium-lutetium-tungsten glasses with the density of 6.49 g/cm(3) and the lifetime of 0.551 ms are developing to be suitable for the potential detection of slow events in the future work. (C) 2020 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

Automated summary

By adjusting the composition and designing new Tb3+-activated tellurium-lutetium-tungsten glasses, significant improvements in optical properties and density have been achieved, with potential applications in the detection of slow events.