采用高温固相法在1 400 ℃下经二次煅烧合成了橙红色荧光粉Ca3Y2-xSi3O12∶xSm3+, 研究了Sm3+离子掺杂浓度及助熔剂对荧光粉发光性能的影响。XRD结果显示, 所合成的荧光粉的主晶相为Ca3Y2Si3O12。荧光光谱分析表明, Ca3Y2Si3O12∶Sm3+硅酸盐荧光粉可以在320～500 nm范围内得到有效激发, 并发射橙红光。在402 nm激发下, 样品发射光谱中的主发射峰分别位于562 nm(4G5/2→6H5/2)、598 nm(4G5/2→6H7/2)和646 nm(4G5/2→6H9/2), 其中598 nm处峰值最大。改变Sm3+离子掺杂浓度发现: 荧光粉发光强度先增大后减小, 最佳Sm3+掺杂量x(Sm3+)为5%, 浓度猝灭机理为离子间的相互作用。讨论了几种助熔剂的影响, NH4F、CaF2和NaCl均降低荧光粉的发光强度, 只有H3BO3能够显著增强样品的发光, 其最佳掺杂质量分数为1%。

The reddish-orange Ca3Y2-xSi3O12∶xSm3+ phosphors were synthesized by the high temperature solid-state method at 1 400 ℃, and the effects of Sm3+ ion doping concentration and fluxes on the luminescence property of the phosphors were studied. The principal crystalline phase of the samples is Ca3Y2Si3O12. Ca3Y2Si3O12∶Sm3+ silicate phosphors can be effectively excited in the range of 320～500 nm, and emit reddish-orange light. Excited by 402 nm, the emission peaks mainly locate at 562 nm (4G5/2→6H5/2), 598 nm (4G5/2→6H7/2), and 646 nm (4G5/2→6H9/2), The peak locating at 598 nm is the maximum. With the increasing of the doping concentration of Sm3+, the emission intensity of the phosphors increases firstly and then decreases. The optimum doping content of Sm3+ is x(Sm3+)=5%. The concentration quenching mechanism is the interaction among ions. The influence of several kinds of fluxes was discussed also. The emission intensities all decrease by adding a certain amount of NH4F, CaF2, NaCl, but increase significantly by adding H3BO3 with the optimum doping mass fraction of 1%.