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Synthesis and Photoluminescence of BaMgAl_(10)O_(17)∶Eu^(2+) Phosphor by Oxalate Co-precipitation Process 被引量:1

Synthesis and Photoluminescence of BaMgAl_(10)O_(17)∶Eu^(2+) Phosphor by Oxalate Co-precipitation Process
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摘要 Single phase of Ba1-x MgAl10O17 : x Eu^2+ (0.02≤ x ≤ 0. 14) phosphors was first successfully prepared by coprecipitation 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-x MgAl10O17:xEu^2+ 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. Single phase of Ba1-x MgAl10O17 : x Eu^2+ (0.02≤ x ≤ 0. 14) phosphors was first successfully prepared by coprecipitation 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-x MgAl10O17:xEu^2+ 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.
出处 《Journal of Rare Earths》 SCIE EI CAS CSCD 2005年第4期401-405,共5页 稀土学报(英文版)
基金 Project supported bythe National Natural Science Foundation of China (50272026) ,the Excellent Young Teachers ProgramofMOE,China (EYTP) and the Natural Science Foundation of Gansu Province (ZS031-A25-033-C)
关键词 BaMgAl10O17:Eu^2+ PHOSPHOR oxalate co-precipitation process reverse strike BaMgAl10O17:Eu^2+ phosphor oxalate co-precipitation process reverse strike
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