You Qi, Lin Hui, Hong Ruijin, Han Zhaoxia, Zhang Dawei, Ding Yuchong
Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, China.
Research & Development Center of Material and Equipment, China Electronics Technology Group Corporation No. 26 Research Institute, Chongqing 400060, China.
Materials (Basel). 2023 Apr 25;16(9):3373. doi: 10.3390/ma16093373.
Cerium-doped gadolinium aluminum gallium garnet (Ce:GdAlGaO, Ce:GAGG) ceramic is a promising scintillation material. In this study, Ce:GdAlGaO scintillation ceramics were prepared by the one-step sintering of commercially available GdO, AlO, GaO, and CeO powders in a flowing oxygen atmosphere at 1600 °C by solid-phase reaction sintering. For all the Ce:GdAlGaO ceramic samples doped with different amounts of Ce doping, dense ceramics were obtained. The structure, photoluminescence, and scintillation properties of the Ce:GdAlGaO ceramics have been investigated. The average grain size of samples sintered at 1600 °C is about 2 μm. The X-ray excitation luminescence peak is around 560 nm, which is consistent with that of Ce:GdAlGaO single crystals, matching well with the computed tomography X-ray detector's response sensitivity. The light yield is higher compared to the standard reference sample-lutetium yttrium orthosilicate single crystal.
铈掺杂钆铝镓石榴石(Ce:GdAlGaO,Ce:GAGG)陶瓷是一种很有前景的闪烁材料。在本研究中,通过在1600℃的流动氧气气氛中通过固相反应烧结对市售的GdO、AlO、GaO和CeO粉末进行一步烧结来制备Ce:GdAlGaO闪烁陶瓷。对于所有掺杂不同量Ce的Ce:GdAlGaO陶瓷样品,均获得了致密陶瓷。对Ce:GdAlGaO陶瓷的结构、光致发光和闪烁性能进行了研究。在1600℃烧结的样品的平均晶粒尺寸约为2μm。X射线激发发光峰在560nm左右,这与Ce:GdAlGaO单晶的发光峰一致,与计算机断层扫描X射线探测器的响应灵敏度匹配良好。与标准参考样品——正硅酸镥钇单晶相比,其光产额更高。