Journal
JOURNAL OF RARE EARTHS
Volume 39, Issue 2, Pages 146-150Publisher
ELSEVIER
DOI: 10.1016/j.jre.2020.04.008
Keywords
Tellurium-lutetium-tungsten glass; Photoluminescence; Energy transfer; Terbium; Rare earths
Categories
Funding
- National Natural Science Foundation of China [11765009]
- Major Discipline Academic and Technical Leaders Training Program of Jiangxi Province [20172BCB22023]
- Science & Technology Project of Shaoguan City in Guangdong Province [2018CS11905]
- Innovation and Entrepreneurship Training Program of College Students [202010419025]
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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.
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.
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