近年來人們對環境污染及能源資源短缺等問題日益重視，促使許多科學家致力於研發低耗能、高光效、無污染的新型「綠色」發光材料。而鋁酸鍶長餘輝發光材料因其具有優異的蓄光-發光性能，為目前研究發展的重點。
　　目前SrAl2O4:Eu, Dy的合成以固態反應法為主，傳統固態反應法合成粉末雖然製程容易、成本低且容易量產，但得到的粉末易受原料混合不均影響而需要較高的反應溫度使反應完成。因此本研究欲改善傳統固態反應法原料混合不均及高溫燒的問題，利用漿料中之boehmite顆粒均勻地被陽離子所包圍之狀態下，形成穩定之凝膠而製備出混合均勻之前導粉末。
　　經實驗結果可知，以硝酸鍶為起始原料合成SrAl2O4螢光體之反應溫度較氯化鍶低，且發光性質佳，當各原料比例為Sr(NO3)2:AlOOH:Eu(NO3)3:Dy(NO3)3:H3BO3 = 0.94:2:0.02:0.04:0.2時，於還原氣氛下、1100℃持溫4小時，可以得到具有最佳餘輝性質之螢光體，較傳統使用α-Al2O3之固態反應法合成溫度低了約100～200℃。

　　In recent years people pay more attention to the problems of environmental pollution and energy resources shortage, so that scientists are devoted to the study of green phosphors which are safe, high-efficiency, and clean. Strontium aluminate becomes the focal point of luminescence study because of its excellent properties on storing up and radiating of light.　
　　At present SrAl2O4:Eu,Dy phosphors are mainly prepared by the solid-state process which is more feasible than others in terms of operation and large-scale production. However, for solid-state process the raw materials are usually not mixed well and very high temperature is needed to synthesize the final powder. In order to solve those problems, a process using boehmite suspension to form a stable and well mixed gel by mixing with aqueous cations was investigated in this thesis.　
　　The results of this study indicated that strontium nitrate is the better choice than strontium chloride to use for synthesizing SrAl2O4:Eu,Dy phosphors with better luminescent characteristics and lower forming temperature. At Sr(NO3)2 : AlOOH : Eu(NO3)3 : Dy(NO3)3 : H3BO3 = 0.94:2:0.02:0.04:0.2, we can synthesize the Sr0.94Al2O4:Eu0.02,Dy0.04 phosphors with best luminescent characteristics. The final powders was obtained after sintering at 1100℃ for 4 hours which is 200~300℃ lower than that obtained by the traditional solid-state process.

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