| Synthesis and Characterization of Cerium-Doped Lutetium Aluminum Garnet Phosphors by Nitrate-citrate Sol-Gel Combustion Process |
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| 作者姓名： | 李会利 刘学建 张其土 黄莉萍 |
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| 作者单位： | [1]College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China [2]Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
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| 基金项目： | Project supported by the National Defence Fundamental Research Project of China |
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| 摘 要： | Nanosized cerium-doped lutetium aluminum garnet （LuAG：Ce） phosphors were prepared by nitrate-citrate solgel combustion process using 1：1 ratio of the citrate：nitrate. The prepared LuAG：Ce phosphors were characterized by XRD, TEM, photoluminescence and radioluminescence spectra excited by UV and X-ray, respectively. The purified crystalline phase of LuAG：Ce was obtained at 900 ℃ by directly crystallizing from amorphous materials. The resultant Lu- AG：Ce phosphors were uniform and had good dispersivity with an average particle size of about 30 urn. Both photoluminescence and radioluminescence were well-known Ce^3＋ emissions located in the range of 470 -600 nm consisting of two emission bands because of the transition from the lowest 5d excited state （2D） to the 4f ground state of Ce^3＋, which matched well with the sensitivity curve of the Si-photodiode. There was a little red shift for the emission components from the UV-excited emission spectrum to the X-ray-excited emission spectrum. The fast scintillation decay component of 26 ns satisfies the requirements of fast scintillators.
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| 关 键 词： | 磷光剂 燃烧过程 光致发光 陶瓷 |
| 文章编号： | 1002-0721（2007）04-0401-06 |
| 收稿时间： | 10 August 2006 |
| 修稿时间： | 2006-08-10 |
Synthesis and Characterization of Cerium-Doped Lutetium Aluminum Garnet Phosphors by Nitrate-citrate Sol-Gel Combustion Process |
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| Li Huili,Liu Xuejian,Zhang Qitu,Huang Liping.Synthesis and Characterization of Cerium-Doped Lutetium Aluminum Garnet Phosphors by Nitrate-citrate Sol-Gel Combustion Process[J].Journal of Rare Earths,2007,25(4):401-406. |
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| Authors: | Li Huili Liu Xuejian Zhang Qitu Huang Liping |
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| Affiliation: | 1. College of Materials Science card Engineering Nanjing University of Technology, Nanjing 210009, China;2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
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| Abstract: | Nanosized cerium-doped lutetium aluminum garnet (LuAG:Ce) phosphors were prepared by nitrate-citrate sol-gel combustion process using 1:1 ratio of the citrate:nitrate. The prepared LuAG:Ce phosphors were characterized by XRD, TEM, photoluminescence and radioluminescence spectra excited by UV and X-ray, respectively. The purified crystalline phase of LuAG:Ce was obtained at 900 ℃ by directly crystallizing from amorphous materials. The resultant LuAG:Ce phosphors were uniform and had good dispersivity with an average particle size of about 30 nm. Both photoluminescence and radioluminescence were well-known Ce3+ emissions located in the range of 470～600 nm consisting of two emission bands because of the transition from the lowest 5d excited state (2D) to the 4f ground state of Ce3+, which matched well with the sensitivity curve of the Si-photodiode. There was a little red shift for the emission components from the UV-excited emission spectrum to the X-ray-excited emission spectrum. The fast scintillation decay component of 26 ns satisfies the requirements of fast scintillators. |
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| Keywords: | LuAG:Ce phosphors sol-gel combustion process photoluminescence radioluminescence rare earths |
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