Structural and Scintillation Properties of Ce<sup>3+</sup>:Gd<sub>3</sub>Al<sub>3</sub>Ga<sub>2</sub>O<sub>12</sub> Translucent Ceramics Prepared by One-Step Sintering
oleh: Qi You, Hui Lin, Ruijin Hong, Zhaoxia Han, Dawei Zhang, Yuchong Ding
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2023-04-01 |
Deskripsi
Cerium-doped gadolinium aluminum gallium garnet (Ce<sup>3+</sup>:Gd<sub>3</sub>Al<sub>3</sub>Ga<sub>2</sub>O<sub>12</sub>, Ce<sup>3+</sup>:GAGG) ceramic is a promising scintillation material. In this study, Ce<sup>3+</sup>:Gd<sub>3</sub>Al<sub>3</sub>Ga<sub>2</sub>O<sub>12</sub> scintillation ceramics were prepared by the one-step sintering of commercially available Gd<sub>2</sub>O<sub>3</sub>, Al<sub>2</sub>O<sub>3</sub>, Ga<sub>2</sub>O<sub>3</sub>, and CeO<sub>2</sub> powders in a flowing oxygen atmosphere at 1600 °C by solid-phase reaction sintering. For all the Ce<sup>3+</sup>:Gd<sub>3</sub>Al<sub>3</sub>Ga<sub>2</sub>O<sub>12</sub> ceramic samples doped with different amounts of Ce<sup>3+</sup> doping, dense ceramics were obtained. The structure, photoluminescence, and scintillation properties of the Ce<sup>3+</sup>:Gd<sub>3</sub>Al<sub>3</sub>Ga<sub>2</sub>O<sub>12</sub> 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<sup>3+</sup>:Gd<sub>3</sub>Al<sub>3</sub>Ga<sub>2</sub>O<sub>12</sub> 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.