Hydrothermal synthesis of Ce:Lu_2SiO_5 scintillator powders

• 作 者: 云平 施鹰 周鼎 谢建军
• 机 构: Department of Electronics and Information Materials,School of Materials Science and Engineering,Shan
• 出 处: Journal of Rare Earths
• 发表日期: 2004年期
• 关键词: powders hydrothermal calcination crystallized cerium attributed heated centered

The synthesis of cerium-doped lutetium oxyorthosilicate (LSO) polycrystalline powders was investigated by a hydrothermal process. The precursor was obtained by the hydrothermal reaction of Lu(NO3)3 with Na2SiO3 at 200 oC for 10 h by using urea as precipitator, followed by a calcination under proper temperatures. The results of XRD indicated that the precursor was crystallized into A-type LSO phase at 1000 oC, and transferred to B-type LSO phase when temperature was raised above 1050 oC. After being heated at 1250 oC for 2 h, single phase of B-type LSO powder was synthesized with homogeneous distribution of particle size ranging from 200 to 300 nm. The photolumi-nescence spectrum of as-synthesized LSO: Ce powders showed a typical broad emission peak centered at 404 nm, corresponding to the 5d1-4f transition of Ce3+.

The synthesis of cerium-doped lutetium oxyorthosilicate (LSO) polycrystalline powders was investigated by a hydrothermal process. The precursor was obtained by the hydrothermal reaction of Lu (NO3) 3 with Na2SiO3 at 200 oC for 10 h by using urea as precipitator, followed by a calcination under proper temperatures. The results of XRD indicated that the precursor was crystallized into A-type LSO phase at 1000 oC, and transferred to B-type LSO phase when temperature was raised above 1050 oC. After being heated at 1250 oC for 2 h, single phase of B-type LSO powder was synthesized with a homogeneous distribution of particle size ranging from 200 to 300 nm. The photoluminescence spectrum of as-synthesized LSO: Ce particles showed a typical broad emission peak centered at 404 nm, corresponding to the 5d1-4f transition of Ce3 +.