球形蓝色荧光粉的制备及发光性能的研究  

Preparation and Photoluminescence Properties of Spherical BAM Blue Phosphors

作　　者：周建新[1] 李东红[1,2] 沈湘黔[1] 王舟[2] 

机构地区：[1]江苏大学,江苏镇江212013 [2]中国铝业股份有限公司郑州研究院,河南郑州450041

出　　处：《稀有金属材料与工程》2008年第A01期774-777,共4页Rare Metal Materials and Engineering

摘　　要：以硫酸铝铵、碳酸钠、硝酸镁、硝酸钡和硝酸铕为原料,采用控制反应沉淀法制备的前驱体在1300℃还原焙烧5 h,成功制得了纯相的球形Ba_(1-x)Eu_xMgAl_(10)O_(17)(BAM,0.1≤x≤0.2)蓝色荧光粉。利用SEM,XRD等分析方法研究了BAM粉体样品的形貌、结构及其相成分;用荧光分光光度计和荧光粉相对亮度测量仪对这种球形BAM荧光粉的荧光性能进行了表征。结果表明:制备的BAM荧光粉颗粒宏观呈球形,无明显的烧结团聚现象。在254 nm紫外光激发下,球形BAM荧光粉发射光谱的最大峰值在450 nm附近。助熔剂的添加提高了荧光粉的发光性能,2%硼酸+2%氟化铝的助熔剂组合效果最佳,球形BAM荧光粉发射强度比未加助熔剂的样品提高了约28%。相对于传统荧光粉,实验制备的球形BAM蓝粉有较好的抗热劣化性能。Spherical Ba（1-x）EuxMgAl10O17 （BAM, 0.1≤x≤0.2） blue phosphors with single phase were successfully prepared by the controlled precipitation-calcination process using ammonium alum, sodium carbonate, magnesium nitrate, barium nitrate and europium nitrate as the raw materials. The morphology and composition of the precursor and the resultant BAM powders were characterized by SEM and XRD. The phosphorescence of the powders was measured by spectrofluorimeter and brightness meter. The BAM phosphor particles derived from calcinations of the precursor at 1300 ℃ for 5 h under a reduction atmosphere were spherical without obvious agglomeration. The emission spectrum excited by 254 nm light showed a characteristic wide band with the peak at about 450 nm. The addition of fluxes improved the phosphor performance. The synthesized phosphors with addition of 2wt% H3BO3 and 2wt% AlF3 increased the emission intensity by 28%. The spherical BAM phosphors showed better thermal resistance characteristics compared to the fraditional phosphors.

关 键 词：球形BAM荧光粉 控制反应沉淀-焙烧法 发光性能 助熔剂 

分 类 号：TB383.3[一般工业技术—材料科学与工程]