Hydrothermal synthesis of Ce: Lu_2SiO_5 scintillator powders
来源期刊：JOURNAL OF RARE EARTHS2009年第5期
论文作者：SHI Ying XIE Jianjun YUN Ping ZHOU Ding
Key words：lutetium oxyorthosilicate; scintillator; hydrothermal; luminescence; powder,rare earths;
Abstract: The synthesis of cerium-doped lutetium oxyorthosilicate (LSO) polycrystalline powders was investigated by a hydrothermal proc-ess. The precursor was obtained by the hydrothermal reaction of Lu(NO_3)_3 with Na_2SiO_3 at 200 ℃ for 10 h by using urea as precipitator, fol-lowed by a calcination uader proper temperatures. The results of XRD indicated that the precursor was crystallized into A-type LSO phase at 1000 ℃, and transfetrred to B-type LSO phase when temperature was raised above 1050 ℃. After being heated at 1250 ℃ 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 Ce~(3+).
SHI Ying1，XIE Jianjun1，YUN Ping1，ZHOU Ding1
(1.Department of Electronics and Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China)
Abstract:The synthesis of cerium-doped lutetium oxyorthosilicate (LSO) polycrystalline powders was investigated by a hydrothermal proc-ess. The precursor was obtained by the hydrothermal reaction of Lu(NO_3)_3 with Na_2SiO_3 at 200 ℃ for 10 h by using urea as precipitator, fol-lowed by a calcination uader proper temperatures. The results of XRD indicated that the precursor was crystallized into A-type LSO phase at 1000 ℃, and transfetrred to B-type LSO phase when temperature was raised above 1050 ℃. After being heated at 1250 ℃ 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 Ce~(3+).
Key words:lutetium oxyorthosilicate; scintillator; hydrothermal; luminescence; powder,rare earths;
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