| 不同冷却方式对Er3+/Yb3+共掺BaF2粉末上转换发光效率的影响 |
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| 引用本文： | 张向华,肖思国,丁庆磊,夏艳琴,刘政威. 不同冷却方式对Er3+/Yb3+共掺BaF2粉末上转换发光效率的影响[J]. 硅酸盐通报, 2006, 25(6): 67-71 |
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| 作者姓名： | 张向华 肖思国 丁庆磊 夏艳琴 刘政威 |
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| 作者单位： | 湖南工程学院电气与信息工程系,湘潭,411101;湘潭大学材料与光电物理学院现代物理研究所,湘潭,411105;湘潭大学材料与光电物理学院现代物理研究所,湘潭,411105;湘潭大学材料与光电物理学院现代物理研究所,湘潭,411105;湘潭大学先进材料及其流变特性教育部重点实验室,湘潭,411105 |
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| 基金项目： | 国家高技术研究发展计划(863计划) , 湖南省教育厅青年基金 , 湖南省自然科学基金 |
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| 摘 要： | 采用液氮制冷和空冷两种冷却方式制备了不同烧结温度的系列相同配方Er3+/Yb3+共掺杂BaF2粉末.与同一烧结温度采用空冷制得的样品相比较,液氮制冷可将样品的上转换荧光强度提高20倍.各样品的XRD图谱表明,经两种方式冷却后样品的晶体结构没有明显区别,但采用液氮制冷制得样品的BaF2平均晶格常数a和样品中Yb2O3含量均较采用空冷制得样品的相应参数略有减小,由此可知液氮制冷有利于更多稀土离子替代基质材料中的Ba2+成为发光中心,提高了样品的上转换发光效率.
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| 关 键 词： | 上转换 BaF2 液氮制冷 空冷 晶格常数, |
Effect of Different Cooling Techniques on Up-converted Fluorescence Efficiency of Er3+/Yb3+ Co-doped BaF2 Powder |
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| ZHANG Xiang-hua,XIAO Si-guo,DING Qing-lei,XIA Yan-qin,LIU Zheng-wei. Effect of Different Cooling Techniques on Up-converted Fluorescence Efficiency of Er3+/Yb3+ Co-doped BaF2 Powder[J]. Bulletin of the Chinese Ceramic Society, 2006, 25(6): 67-71 |
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| Authors: | ZHANG Xiang-hua XIAO Si-guo DING Qing-lei XIA Yan-qin LIU Zheng-wei |
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| Affiliation: | 1. Dept. of Electrical and Information Engineering, Hunan Institute of Engineering, Xiangtan 411101, China; 2. Institute of Mordon Physics, Faculty of Material Science and Photoelectric Physics, Xiangtan University, Xiangtan 411105, China; 3. Key Laboratory for Advanced Materials and Rheological Properties of Ministry of Education of China, Xiangtan University, Xiangtan 411105,China |
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| Abstract: | A series of Er 3 /Yb 3 co-doped BaF_2 powders with the same compositions were prepared at different sintering temperatures, and the samples were cooled by liquid-nitrogen refrigerating and air-cooling, respectively. It was detected that the up-converted fluorescence intensity could be enhanced 20 times with liquid-nitrogen refrigerating than that with air-cooling. The crystal structures of samples show no apparent difference by X-ray powder diffraction (XRD). However, compared with the samples cooled by air-cooling, the lattice parameter of BaF_2 and the concentration of Yb_2O_3 in the samples cooled by liquid-nitrogen refrigerating were both smaller. It was induced that more rare earth ions substituted the Ba 2 as sensitizing center with liquid-nitrogen refrigerating, which enhanced the efficiency of up-converting fluorescence of samples. |
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| Keywords: | up-conversion BaF_2 liquid-nitrogen refrigerating air-cooling lattice parameter |
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