一、引言稀土激活的铝酸盐荧光粉,如Ba_(1-x)Eu_xMgAl_(10)O_(17)和 Ce_(1-y)Tb_yMgAl_(11)O_(19)可作为三基色荧光灯中的蓝绿发光材料。但是随着荧光灯使用时间的延长,铝酸盐荧光粉受低压放电的影响而劣化,灯的光输出降低。原因是与色心形成有关的光化学反应所致。使荧光粉劣化的反应程度和速度在很大程度上取决于激活剂的浓度。对于Y_2O_3:Eu~(3+) I. INTRODUCTION Rare-earth activated aluminate phosphors such as Ba 1-x Eu x M g Al 10 O 17 and Ce 1-y Tb y M g Al 11 O 19 can be used as blue Green luminescent material. However, with the prolonged use of fluorescent lamps, the aluminate phosphor deteriorates under the influence of low voltage discharge, and the light output of the lamp decreases. The reason is due to the formation of the color center photochemical reaction due. The extent and speed of the reaction that degrade the phosphors depends very much on the concentration of activator. For Y_2O_3: Eu ~ (3+)