本文采用还原氛下的高温固相法合成了荧光粉Sr5(PO4)3F∶Eu2+并对其性能进行了表征, 同时研究了助熔剂硼酸对该荧光粉的影响。结果表明: 在1200 ℃还原氛下制得的荧光粉Sr5(PO4)3F∶Eu2+, 激发峰位于418 nm, 发射峰位于524 nm, 是能与近紫外光LED相匹配的蓝绿色荧光粉。Eu2+的最佳掺杂浓度为 15mol%, 对应的色坐标为(0.2871, 0.4036)。添加助熔剂H3BO3可以使荧光粉Sr5(PO4)3F∶Eu2+的合成温度由1200 ℃降低到1100 ℃, 最佳掺杂浓度为5wt%, 同时可以增加荧光粉的发光强度。

A green-blue phosphors Sr5(PO4)3 F∶Eu2+ was prepared by high temperature solid-state method. The structure and spectral properties of the phosphor were characterized, and the effects of flux was studied. The results show that the doping of rare earth ions Eu2+ in Sr5(PO4)3F system does not change the structure; the excitation spectrum of phosphors Sr5(PO4)3F∶Eu2+ is the broadband with the main peak at 418 nm, and the emission spectrum is the broadband with the main peak at 524 nm; the optimum doping concentration of Eu2+ in phosphors Sr5(PO4)3F∶Eu2+ is 15mol%. Therefore, the phosphor Sr5(PO4)3F∶Eu2+ is a green-blue phosphor which can be effectively stimulated by near ultraviolet LED. The doping effects of flux have been studied, also. The results show that the doping concentration of flux H3BO3 is 5wt% in Sr5(PO4)3F∶Eu2+ system, which could reduce the reaction temperature from 1200 ℃ to 1100 ℃ and enhance the luminous intensity remarkably.