YAG∶Ce^(3+)荧光粉的高温固相合成及发光研究

The Synthesis and Luminescence Measurement of YAG∶Ce^(3+) Phosphors by High Temperature Solid Phase Method

采用高温固相法合成YAG∶Ce3+发光材料。用正交试验法设计实验,确定Ce3+掺杂量、焙烧温度、焙烧时间的最佳条件。研究结果发现:(1)荧光粉发光强度的影响因素排列顺序是:焙烧温度>焙烧时间>Ce离子掺杂量。其中焙烧温度的影响最为关键,其次是焙烧时间的影响,而Ce离子掺杂量的影响较小。(2)用高温固相法制备YAG∶Ce3+荧光粉的最佳工艺参数为:焙烧温度1 600℃,Ce离子掺杂量0.10mol,焙烧时间4h,即A5B5C3组合。依此条件,合成的荧光粉发光最好。另一个最优组合是:焙烧温度1 600℃,Ce离子掺杂量0.08mol,焙烧时间4h,即A5B4C3组合。依此条件,合成的荧光粉发光也很好,但稍弱于A5B5C3组合。对合成YAG∶Ce3+发光材料的激发(343和467nm)、发射(529nm)光谱的峰形变化及跃迁性质进行了深入分析及指认。

YAG ： Ce^3＋ luminescence materials were prepared by a high-temperature solid state method. Different influencing fac tors,e. g. , the doping amount of Ce^3＋ , sintering temperature, and sintering time, were investigated by theorthogonal experi ment method. The results showed that： （1） the influence of three factorson light-emitting intensity of YAG ： Ce^3＋ phosphors is in the following order, sintering temperature〉〉sintering time〉the dopingamount ofCe^3＋ ;（2） the optimum conditions for YAG . Ce3＋ phosphors are： sintering temperature 1 600 ℃, the doping amount of Ce^3＋ 0. 10 tool, and sintering time 4 h. Underthese conditions, the light-emitting intensity of YAG.Ce^3＋ phosphors prepared are.. sintering temperature 1 600 ℃, the doping amount of Ce^3＋ O. 10 mol, and sintering time 4 h. Underthese conditions, the light-emitting intensity of YAG ：Ce^3＋ phosphors prepared is the largest. Furthermore, another optimumconditions are.. sintering temperature 1 600 ℃, the doping amount of Ce^3＋ 0. 08 mol, and sintering time 4 h, and the YAG ：Ce^3＋ phosphors prepared are also excellent based on them. The transition properties and spectral features of excitation and luminescence spectra of these synthesized phosphors were analyzed in detail and assigned as Ce^3＋ 4f-5d transition.