Details

Autor(en) / Beteiligte

• Zou, Zhenggang
• Peng, Guanghuai
• Hu, Junjie
• Liao, Jinsheng
• Wen, Herui
• Liu, Fang
• Zhong, Jiuping

Titel

Microstructure and luminescence properties of a Ce3+-doped Lu3Al5O12/Al2O3 eutectic grown by the micropulling down method

Ist Teil von

• Journal of alloys and compounds, 2019-07, Vol.794, p.144-152

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2019

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Inorganic scintillation materials have been widely used in several fields, such as high energy physics, nuclear medical imaging and industrial nondestructive inspection. In this work, a novel scintillation material, (CexLu1-x)3Al5O12/Al2O3 (Ce3+:LuAG/Al2O3) eutectic with different Ce3+-doping concentrations, was successfully grown by the micropulling down method at different pulling speeds. The effects of Ce3+-doping concentration and pulling speed on the microstructure and luminescent properties of the Ce3+:LuAG/Al2O3 eutectic were investigated. The eutectic has a typical garnet structure, and a “Chinese script” microstructure can be seen throughout the cross section. As the pulling speed increased, the grain size and the morphological appearance of the “Chinese script” microstructure decreases. The Ce3+:LuAG/Al2O3 eutectic shows a characteristic Ce3+ emission band centered at 508 nm, and the emission intensity increases with increasing Ce3+-doping concentration until the Ce3+-doping concentration reaches x = 0.01. The eutectic grown at a pulling speed of 1.7 mm/min shows maximum emission intensity, and the light yield of the (Ce0.01Lu0.99)3Al5O12/Al2O3 eutectic excited with X-ray at room temperature is approximately 64% of that of the (Ce0.01Lu0.99)3Al5O12 single crystal. The results reveal that the Ce3+:LuAG/Al2O3 eutectic has a potential application as an X-ray detector material. [Display omitted] •The Ce3+:LuAG/Al2O3 eutectic was firstly grown by the micropulling down method.•The eutectic exhibits garnet structure and typical “Chinese script” microstructure.•The eutectic has high light-yield, short decay time and an X-ray detector material.