Synthesis of Spherical (Y,Gd)BO3∶Eu3+ Phosphor Using W/O Emulsion System
来源期刊：JOURNAL OF RARE EARTHS2006年第6期
论文作者：Long Zhen Yu Zhijian Xia Tian Zhuang Weidong Cui Xiangzhong Zhao Chunlei Huang Xiaowei Zhang Xiying
Key words：emulsion; W/O; PDP; phosphor; photoluminescence (PL) property; VUV; rare earths;
Abstract: Spherical (Y, Gd)BO3:Eu3+ phosphor particles with a narrow size distribution(2～4 μm) was obtained by firing the Y-Gd-Eu-BO3 precursor prepared in a W/O style emulsion system. In the W/O emulsion system, kerosene, used as oil phase, was mixed with Span 80 and Tween 80 compounds which were employed as the emulsifier with an HLB (hydrophile-lipophile balance) value of 5.2～5.3. Both rare earths (Y, Gd and Eu) nitrate and boric acid solution or ammonia solution were used as aqueous phase. The synthesis conditions, such as emulsion composition, emulsifying style, precipitation reaction process, reaction temperature, morphology control, and so on, were investigated, and the optimum synthesis conditions for preparing spherical (Y, Gd)BO3∶Eu3+ phosphor was obtained. The phosphor was characterized by XRD, SEM, laser particle size analysis, emission and excitation spectrum under vacuum ultraviolet (VUV), and so on. The phosphor synthesized using the water-in-oil emulsion method with median diameter (D50) of 2～4 μm shows agreeable photoluminescence (PL) property and sphericity. The main emission peak appears at about 593 nm, which corresponds to 5D0→7F1 transition (magnetic-dipole transition) of the Eu3+ ion. The cell parameters and powder diffraction data were indexed. The structure of the phosphor belongs to the hexagonal system with space group P63/m.
Long Zhen1，Yu Zhijian1，Xia Tian1，Zhuang Weidong1，Cui Xiangzhong1，Zhao Chunlei1，Huang Xiaowei1，Zhang Xiying1
(1.National Engineering Research Center for Rare Earth Materials, General Research Institute for Nonferrous Metals, Grirem Advanced Materials Co. Ltd., Beijing 100088, China)
Abstract:Spherical (Y, Gd)BO3:Eu3+ phosphor particles with a narrow size distribution(2～4 μm) was obtained by firing the Y-Gd-Eu-BO3 precursor prepared in a W/O style emulsion system. In the W/O emulsion system, kerosene, used as oil phase, was mixed with Span 80 and Tween 80 compounds which were employed as the emulsifier with an HLB (hydrophile-lipophile balance) value of 5.2～5.3. Both rare earths (Y, Gd and Eu) nitrate and boric acid solution or ammonia solution were used as aqueous phase. The synthesis conditions, such as emulsion composition, emulsifying style, precipitation reaction process, reaction temperature, morphology control, and so on, were investigated, and the optimum synthesis conditions for preparing spherical (Y, Gd)BO3∶Eu3+ phosphor was obtained. The phosphor was characterized by XRD, SEM, laser particle size analysis, emission and excitation spectrum under vacuum ultraviolet (VUV), and so on. The phosphor synthesized using the water-in-oil emulsion method with median diameter (D50) of 2～4 μm shows agreeable photoluminescence (PL) property and sphericity. The main emission peak appears at about 593 nm, which corresponds to 5D0→7F1 transition (magnetic-dipole transition) of the Eu3+ ion. The cell parameters and powder diffraction data were indexed. The structure of the phosphor belongs to the hexagonal system with space group P63/m.
Key words:emulsion; W/O; PDP; phosphor; photoluminescence (PL) property; VUV; rare earths;
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