鈰摻雜之釔鋁石榴石(Cerium doped yttrium aluminum garnet, YAG:Ce)螢光粉為現今最具應用之螢光粉材料，透過噴霧乾燥法方式，進行連續式螢光粉生產之研究，本實驗透過添加具有羧基(-COO-)之有機酸進行前驅物溶液改質，利用金屬離子與羧基錯合程度及有機酸燃燒熱差異，達到控制噴霧乾燥之粉體形貌、晶粒大小、粒徑分佈及螢光性質目的。
此研究分別添加具備一對羧基之甲酸、二對羧基之草酸及三對羧基之檸檬酸於前驅物溶液中，透過甲酸、草酸及檸檬酸具備之不同羧基(-COO-)數量對於金屬離子進行錯合反應，控制噴霧乾燥粉體之形貌為光滑球體、表面凹陷球體及皺褶球體，使經一階段噴霧乾燥粉體於空氣下進行1300 ℃煆燒程序，生成鈰摻雜之釔鋁石榴石螢光粉；粉體藉由X光晶體繞射分析儀(XRD)進行晶相鑑定及透過Scherrer 方程式進行晶粒大小之運算、傅立葉轉換紅外線光譜(FTIR)進行粉體之官能基鑑定、聚焦離子束顯微系統(FIB)進行粉體之截面分析、場發射穿透式電子顯微鏡(FE-TEM) 進行粉體之形貌分析、螢光光譜儀(PL)進行之光致螢光性質分析。

The potential phosphor particles of Ce-doped yttrium aluminum garnet (YAG) have been prepared using spray drying. Spray drying offers the advantage of homogenous particles and regular shape comparing to the common method of solid state reaction. It is well known that the acids plays the important role on the particle shape for the spray dried powders. So, three common acids of formic acid, oxalic acid, and citric acid were used to prepare Ce-doped YAG powders. The citric acid-treated powder exhibits the highest photoluminescence intensity than the formic acid and oxalic acid-treated powders because it exhibits the smoother surface than that of the formic acid and oxalic acid-treated powders. In addition, the formation mechanisms of various Ce-doped YAG powders were discussed.

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