Fabrication, microstructure and luminescence properties of Cr3+ doped Lu(3)A(15)O(12) red scintillator ceramics
Fabrication, microstructure and luminescence properties of Cr3+ doped Lu(3)A(15)O(12) red scintillator ceramics
复制标题
Cr 3 掺杂Lu 3 A1 5 O 12 红色闪烁体陶瓷的制备、显微结构及发光性能
DOI：
10.1016/j.optmat.2017.02.061
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发表时间：
2017
影响因子：
3.9
通讯作者：
Li Jiang
中科院分区：
文献类型：
--
作者：
Shi Yun;Zhao Yu;Liu Qiang;Cao Maoqing;Ma Peng;Chen Haohong;Liu Qian;Li Jiang
Cr3+doped Lu3A15O12transparent ceramics were developed as a new red scintillator ceramics. These ceramics were fabricated by a solid state reaction method under vacuum sintering at temperature range of 1550 °C–1890 °C for 10 h. The doping effect of different Cr3+concentration (0, 0.1, 0.3 and 0.5 at. %) and air annealing effect were investigated as well. The transparent ceramics (70% @1 mm in visible light range) with dense microstructure were obtained when sintered at 1890 °C for 10 h, the average grain size of 0.3 at.% Cr:LuAG was calculated to be 7 μm. Photo-luminescence spectra revealed that there are two typical excitation bands at around 450 nm and 600 nm which were ascribed to the d–d transitions of Cr3+. 0.3 at. % Cr:LuAG exhibited the optimum photoluminescence intensity and fast decay. Radio-luminescence under X-ray excitation indicated a characteristic Cr3+emission peaking at 687 nm and 706 nm respectively. The Lu3+Alantisite defects related emission at around 300 nm was observed to decrease with the doping of Cr3+. The steady luminescence efficiency (XEL spectrum integral) is around 20 times of the commercial BGO crystals, more important, the broad and continuous red emission between 600 nm and 800 nm demonstrated Cr:LuAG ceramics a prospective application as new red scintillators.
