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Consolidation of translucent Ce3+-doped Lu2SiO5 scintillation ceramics by pressureless sintering

Published online by Cambridge University Press:  28 July 2014

Lingcong Fan ,
Ying Shi ,
Jian Xu ,
Jianjun Xie  and
Fang Lei
Lingcong Fan
Affiliation:
Department of Electronics and Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
Ying Shi*
Affiliation:
Department of Electronics and Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
Jian Xu
Affiliation:
Department of Electronics and Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
Jianjun Xie
Affiliation:
Department of Electronics and Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
Fang Lei
Affiliation:
Department of Electronics and Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The fabrication of Ce3+-doped lutetium oxyorthosilicate (Lu2SiO5:Ce, LSO:Ce) scintillation ceramics was investigated by pressureless sintering starting from synthetic submicrometer polycrystalline LSO:Ce powder. It was found that translucent LSO ceramics were densified successfully with relative density of 99.5% under sintering condition of 1720 °C for 4 h. As-sintered LSO ceramics were pore-free with average grain size of 5 μm and exhibited a translucent state. The broad emission spectra centered at 419 nm of the LSO:Ce ceramics under vacuum ultraviolet (VUV) and UV excitation at room temperature. Under x-ray excitation, the overall emission intensity of obtained LSO ceramics achieved twice of that of bismuth germanium oxide (also known as bismuth germanate) single crystal at room temperature. Under excitation of 356 nm and emission of 420 nm, the luminescence decay time of the obtained LSO scintillation ceramics reached only 21.2 ns. The light yield of the LSO ceramics was 21,300 ph/MeV, which reached 91% of that of LSO single crystal.

Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 19: Focus Issue: Optical Ceramics Science , 14 October 2014 , pp. 2252 - 2259
Copyright
Copyright © Materials Research Society 2014 

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