以BaCO3、SiO2、Eu2O3为原料在还原气氛下采用高温固相法制备了Ba3SiO5∶Eu荧光粉体。 实验结果表明, 制备Ba3SiO5的最佳工艺条件是Ba/Si比为3, 1 200 ℃保温4 h。光谱分析表明, Ba3SiO5∶Eu荧光粉在254,365,410 nm激发下发射主峰为566 nm(Eu2+的4fn－15d→4fn)宽带发射, 量子效率分别为70%、50%、10%, 荧光寿命为百纳秒级；以566 nm为监视波长测得激发谱为主峰在250~450 nm范围内的宽带发射, 主峰为360 nm, 且在410 nm出现小峰； Eu离子最佳掺杂浓度为5%, 由发光强度随掺杂离子浓度变化曲线, 可以得出Ba3SiO5中Eu离子能量传递是基于电四级-电四级作用。

Ba3SiO5∶Eu phosphor was synthesized by solid-state reaction method at a mild reducing atmosphere. BaCO3, SiO2,Eu2O3 were the raw materials. The results show that the optimized fabrication condition for Ba3SiO5 is that Ba/Si atomic ratio should equal to 3, annealed temperature should be 1 200 ℃. Under 254, 365, 410 nm excitation, Ba3SiO5∶Eu phosphor would give out broadband emission(centered at 566 nm, related to Eu ion 4fn-15d→4fn), and the absolute PL quantum yields are 70%, 50%, 10% respectively. The photoluminescent lifetime is 102 ns. The excitation monitored by 566 nm has a broadband emission in the range of 250-450 nm centered at 360 nm, with a small peak at 410 nm. The optimal Eu dopant content is 5%. From the curve of luminescent intensity vs. dopant content, the energy transfer way of activator in Ba3SiO5 can be deduced as electric quadrupole-quadrupole interaction.