以柠檬酸为络合剂,采用溶胶-凝胶法成功制备了Al18B4O33:Eu,Tb荧光粉.采用热分析仪、X射线衍射仪和扫描电镜分别对样品进行了热分析、结构和形貌分析,采用荧光光谱仪和亮度计测试样品的激发发射光谱和亮度.结果表明:前驱体先经700℃预烧,然后再于1100℃煅烧3h后,可获得粒度分布均匀、结晶性良好的Al18B4O33:Eu,Tb荧光粉;共掺杂Eu和Tb的Al18B4O33荧光粉可同时发出“三基色”所需要的特征发光;该荧光粉中同时存在Eu2+离子、Tb3+离子和Eu3+离子,在350～ 400 nm之间的紫外区域存在较强的激发峰,可被用于与紫外LED复合合成白光LED;通过研究Eu和Tb的掺杂量对荧光粉发光强度的影响发现,适量调节Eu和Tb的掺杂量可以改变Al18B4O33:Eu,Tb荧光粉的发光颜色和强度.
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