期刊
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
卷 61, 期 1, 页码 306-311出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNS.2013.2291320
关键词
Co-precipitation; GAGG powder; inorganic scintillator; materials; nanotechnology; precipitant
资金
- National Natural Science Foundation of China [51201175]
- Zhejiang Provincial Public Welfare Technology Program [2010C31106,, 2012C21109]
- Science Foundation of Ningbo [2011A610096]
- aided program for Science and Technology Innovative Research Team of Zhejiang Province and Ningbo Municipality [2009B21005]
In order to obtain a uniform transparent ceramic scintillator, well-dispersed fine starting powders with high-purity, small grain size, spherical morphology and high sinter-ability are necessary. In this study, Ce3+ doped gadolinium aluminum gallium garnet Gd3Al3Ga2O12 (GAGG) powders were synthesized by the co-precipitation method. NH4OH, NH4HCO3 and the mixed solution of NH4OH and NH4HCO3 were used as precipitants, respectively. The precursor composition, phase formation process, microstructure, morphology, particle size distribution and luminescent properties of obtained GAGG powders were measured. The results show that powders prepared using the mixed precipitant exhibit the best microstructural morphology, good sinter-ability and highest luminescent intensity. Pure GAGG polycrystalline powders could be obtained at about 950 degrees C for 1.5 h and the average size of the particles is about 50 nm. The photoluminescence spectrum shows a strong green-yellow emission near 540 nm.
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