Synthesis of Long Afterglow Phosphors MAI204:Eu^2+ , Dy^3+ (M=Ca, Sr, Ba) by Microemulsion Method and Their Luminescent Properties |
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引用本文: | 邱关明,陈永杰,耿秀娟,肖林久,田一光,孙彦彬.Synthesis of Long Afterglow Phosphors MAI204:Eu^2+ , Dy^3+ (M=Ca, Sr, Ba) by Microemulsion Method and Their Luminescent Properties[J].中国稀土学报(英文版),2005,23(5):629-632. |
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作者姓名: | 邱关明 陈永杰 耿秀娟 肖林久 田一光 孙彦彬 |
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作者单位: | [1]School of Materials and Engineering, Changchun Science and Technology University, Changchun 130022,China [2]School of Materials and Metallurgy, Northeastern University, Shenyang 110006, China [3]School of Applied Chemistry, Shenyang Institute of Chemical Technology, Shenyang 110142, China [4]Department of Chemistry, Wenzhou University, Wenzhou 325027, China [5]College of Materials Science and Engineering, JilinUniversity, Changchun 130026, China |
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基金项目: | Project supported by the National Natural Science Foundation of China (50373034) |
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摘 要: | Long afterglow phosphors MAl2O4:Eu^2+ , Dy^3+ (M = Ca, Sr, Ba) were synthesized by microemulsion method, and their crystal structure and luminescent properties were compared and investigated. XRD patterns of samples indicate that phosphors CaAl2O4:Eu^2+, Dy^3+ and SrAl2O4 : Eu^2+, Dy^3+ are with monoelinie crystal structure and phosphor BaAl2O4:Eu^2+ , Dy^3+ is with hexagonal crystal structure. The wide range of excitation spectrum of phosphors MAl2O4: Eu^2 + , Dy^3+ (M = Ca,Sr, Ba) indicates that the luminescent materials can he excited by light from ultraviolet ray to visible light and the maximum emission wavelength of phosphors MAl2O4:Eu^2+ , Dy^3+ (M = Ca, Sr, Ba) is found mainly at λem of 440 nm (M = Ca), 520 nm (M = Sr) and 496 nm (M = Ba) respectively, the corresponding colors of emission light are blue, green and eyna-green respectively. The afterglow decay tendency of phosphors can he summarized as three processes: initial rapid decay, intermediate transitional decay and very long slow decay. Afterglow decay curves coincide with formula I = At^ - n, and the sequence of afterglow intensity and time is Sr 〉 Ca 〉 Ba.
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关 键 词: | 镝 铕 稀土 合成方法 发光性能 非金属材料 化学稳定性 |
文章编号: | 1002-0721(2005)05-0629-04 |
收稿时间: | 2005-04-30 |
修稿时间: | 2005-07-10 |
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