以(NH4)2HPO4为沉淀剂,采用共沉淀法合成Tb3+掺杂BiPO4基绿色荧光粉.通过DTA-TG、XRD、IR等方法对荧光粉的结构、组成进行了表征.结果表明,在室温条件下得到了纯六方相BiPO4∶Tb3+,当退火温度为400℃时,开始出现单斜相,温度升高到600℃以上时晶相转变为纯单斜相BiPO4∶Tb3+.利用激发光谱和发射光谱研究了Tb3在BiPO4基质中的发光性能,六方相和单斜相BiPO4∶Tb3+样品均可发光,在紫外光377 nm紫外光的激发下测定的六方相和单斜相BiPO4∶Tb3+发射光谱的峰位相同,主要发射峰出现在544nm处强的5D4→7F5跃迁和490 nm、590 nm、622 nm处弱的5D4→7 F6、5D4→7 F4、5D4→7 F3跃迁.当BiPO4∶Tb3+为单斜相时Tb3+在BiPO4基质中的发光强度明显强于六方相BiPO4∶ Tb3+.
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