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  4. Y2SiO5:Ce3+ particle growth during sol-gel preparation

稀土学报(英文版), 2010, 28(4): 504-508. doi: 10.1016/51002-0721(09)60141-1

1, , 2, , 3, , 4, , 5,

1.Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China

2.Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry & Materials Science, Shaanxi Normal University, Xi'an 710062, China

3.Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

4.College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China

5.Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

基金项目:   the National Natural Science Foundation of China(20221101;20821091;20423005)   the State Key Program for Basic Research of China(G1998061306)  

Y2SiO5:Ce3+ particle growth during sol-gel preparation

LI Xiujuan 1, , JIAO Huan 2, , WANG Xiaoming 3, , ZENG Zhengzhi 4, , JING Xiping 5,

1.Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China

2.Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry & Materials Science, Shaanxi Normal University, Xi'an 710062, China

3.Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

4.College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China

5.Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

Keywords： optical materials

The phosphor Y2SiO5:Ce3+ was prepared by a sol-gel method and the particle growth process was investigated by XRD, SEM and TEM. After heating at 400 ℃, the as-dried gel became a powder composed of mixed phases of polycrystalline Y2O3 and amorphous SiO2.With an increase in temperature, the crystallinity of Y2O3 improved. The sample quickly changed to the pure Y2SiO5 phase when it was heated at 1400 ℃ for 10 min. SEM indicated that the as-dried gel consisted of large porous particles. At an annealing temperature of higher than 400 ℃, the pores in the large particles gradually expanded and grains started to appear. Consequently, the large particles disintegrated into small particles. When the sample was heated at 1400 ℃, we obtained fine phosphor particles (around 2 μm) with smooth surfaces. The optimized condition for the preparation of the Y2SiO5:Ce3+ phosphor was to heat at 1400 ℃ for 2 h.

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