使用真空电子束交替蒸发的方法,在DMD-450型真空镀膜系统中,通过调整Sr_2CO_3、Al_2O_3、Eu_2O_3、Dy_2O_3独立原料靶材的蒸发时间和蒸发周期次数,制得蓝绿色(GF) 和蓝紫色(PF)发光膜.在以铝酸盐为基质的蓄能发光膜中,改变铝与锶的摩尔比,将出现Eu~(2+)的4f~65d~1→4f~7多颜色宽带跃迁和Eu~(3+)的~5D_0→~7F_J窄带跃迁.还原热处理条件对发光膜的发光性能有着重要影响:温度明显影响结晶状态;还原气氛中H_2量对发光膜的发光颜色影响较小,但会影响其相对发光强度.
In the DMD-450 vacuum deposition system, the evaporation time and cycle times for Sr_2CO_3, Al_2O_3, Eu_2O_3, and DY_2O_3 targets were changed by Alternate Electron Beam Evaporation method to prepare the blue-green film(GF) and the blue-purple film(PF). Variation of Al_2O_3/SrO molar ratio in the light-storing ceramic films with aluminate base will produce many different crystal phases which induce the various broadband 4f~65d~1→4f~7 transitions of Eu~(2+) and the narrowband ~5D_0→~7F_J transitions of Eu~(3+). Annealing conditions has great influence on the luminescent properties of the films, among which annealing temperature affects crystallization and the H_2 proportion in annealing atmosphere has little influence on the film color but will affect its intensity.
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