The role of air annealing on the optical and scintillation properties of Mg co-doped Pr:LuAG transparent ceramics

0481240 - FZÚ 2018 RIV NL eng J - Journal Article
Hu, Z. - Cao, M. - Chen, H. - Shi, Y. - Kou, H. - Xie, T. - Wu, L. - Pan, Y. - Feng, X. - Vedda, A. - Beitlerová, Alena - Nikl, Martin - Li, J.
The role of air annealing on the optical and scintillation properties of Mg co-doped Pr:LuAG transparent ceramics.
Optical Materials. Roč. 72, Oct (2017), s. 201-207. ISSN 0925-3467. E-ISSN 1873-1252
R&D Projects: GA ČR GA16-15569S
Institutional support: RVO:68378271
Keywords : Mg co-doped Pr:LuAG * transparent ceramics * annealing effect * luminescence
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.320, year: 2017

Polycrystalline 0.2at%Pr:Lu3Al5O12 (Pr:LuAG) transparent ceramics were fabricated by solid-state reaction using 0.01 wt% MgO as sintering aid. The as-sintered ceramics were annealed in air at different temperatures. Optical absorption, photoluminescence, X-ray excited luminescence and pulse height spectra obtained after different annealing were compared. Modifications of the oxygen vacancy concentrations are found to govern the changes of the optical and scintillation response for annealing temperatures lower than 1000°C, while the oxidation of Pr3+ to Pr4+ plays a more important role for higher temperatures. Air annealing up to 700°C is an effective tool to improve the 5d-4f emission efficiency of MgO co-doped Pr:LuAG transparent ceramics.

Permanent Link: http://hdl.handle.net/11104/0276834