Synthesis and Photoluminescence of BaMgAl10O17:Eu2+ Phosphor by Oxalate Co-precipitation Process
来源期刊：JOURNAL OF RARE EARTHS2005年第4期
论文作者：Du Yunkun Li Feng Wang Yuhua Zhang Zhanhui
Key words：BaMgAl10O17:Eu2+; phosphor; oxalate co-precipitation process; reverse strike;
Abstract: Single phase of Ba1-xMgAl10O17:xEu2+ (0.02≤x≤0.14) phosphors was first successfully prepared by co-precipitation in aqueous medium with a "reverse strike" method, using oxalic acid and ammonia together as precipitants. Completely crystallized phosphors were obtained at 1300 ℃, which is 300 ℃ lower than the temperature of solid-state reaction. Their photoluminescence was investigated under UV and VUV region, respectively. The emission spectra of Ba1-xMgAl10O17:xEu2+ samples excited by 254 or 147 nm showed a characteristic wide band with the peak centred at about 450～454 nm. Optimum emission intensity reached at x=0.1 and then concentration quenching occurred. The synthesized phosphor shows 10% higher emission intensity than that prepared by solid-state reaction.
Du Yunkun1，Li Feng1，Wang Yuhua1，Zhang Zhanhui1
(1.Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China)
Abstract:Single phase of Ba1-xMgAl10O17:xEu2+ (0.02≤x≤0.14) phosphors was first successfully prepared by co-precipitation in aqueous medium with a "reverse strike" method, using oxalic acid and ammonia together as precipitants. Completely crystallized phosphors were obtained at 1300 ℃, which is 300 ℃ lower than the temperature of solid-state reaction. Their photoluminescence was investigated under UV and VUV region, respectively. The emission spectra of Ba1-xMgAl10O17:xEu2+ samples excited by 254 or 147 nm showed a characteristic wide band with the peak centred at about 450～454 nm. Optimum emission intensity reached at x=0.1 and then concentration quenching occurred. The synthesized phosphor shows 10% higher emission intensity than that prepared by solid-state reaction.
Key words:BaMgAl10O17:Eu2+; phosphor; oxalate co-precipitation process; reverse strike;
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