在活性炭还原气氛下高温固相法合成了Ba3( PO4)2:Ce3+,Dy3+紫外发射荧光粉.XRD图谱表明,烧结温度为1100℃时保温处理3h,样品为单相的Ba3 (PO4)2型六方晶系结构.荧光光谱显示:单掺Ce3+样品中,Ce3掺杂浓度为8％(摩尔分数)时样品的发光最强,发射峰的位置处在350 nm附近(Ce3的2 D→2 F5/2和2D→2F7/2跃迁发射).适量的Sr2+取代部分Ba2+离子,改变了基质晶格环境,使样品的发光强度得到提高且发射峰向长波方向红移.引入Dy3+作为敏化剂,样品发射峰红移到386 nm,亮度增强,主要是由于Dy3+和Ce3+之间发生了有效的能量传递过程.确定了Dy3+的最佳掺杂浓度为3％,发光强度提高了27％.
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