本研究是以溶膠-凝膠法(Sol-Gel)製備堇青石(Mg2Al4Si5O18)螢光粉末，並探討不同活化劑及熱處理條件對其結構、微結構及發光特性之影響。
乾燥粉末經加熱至900 oC開始產生μ- Mg2Al4Si5O18結晶，當熱處理溫度到達1100 oC會出現α- Mg2Al4Si5O18，升至1300 oC後則為α- Mg2Al4Si5O18純相。Mg2Al4Si5O18粉末摻雜Mn2+會於517 nm產生綠光的放射波，摻雜Cr3+後於696 nm產生紅光的放射波，而摻雜Eu 3+後於616 nm產生橘紅光的放射波，經過還原氣氛熱處理後Mn2+之放射峰為517 nm且增強綠光強度，Eu 2+之放射峰為450 nm為藍光放射，而共摻活化劑呈現紅綠光放射，其中共摻Mn、Ce、Eu的粉末具有近白光放射區域。活化劑種類與濃度、活化劑離子狀態、熱處理條件會影響粉末之表面微結構型態及發光特性。

In this study, Mg2Al4Si5O18 powders have been synthesized by the sol–gel process. Effects of the different activators and heat treatment conditions on the structure, microstructure and luminescence properties were investigated.
The dry powders started to produce μ-Mg2Al4Si5O18 crystals after heat treatment at 900 oC. When the heating temperature reached 1100 oC, α-Mg2Al4Si5O18 appeared, and the pure phase α-Mg2Al4Si5O18 formed after at 1300 oC. Mn2+-doped powders emited green light emission with peaking at 517 nm, while Cr3+- or Eu3+-doped powders emited red or orange red light emission peaking at 397 or 393 nm, respectively. Upon heating in reducing atmosphere, Mn-doped powders showed the enhancement of emission intensity, and Eu-doped powders became blue light emission at 450 nm. The Mn/Eu co-doped powders possessed a near white light emission. The microstructure and luminescence properties of powders were dependent on the species, concentration and ionic state of activator, as well as the heat treatment conditions.

摘要.........................i
Abstract.........................ii
誌謝.........................iii
目錄.........................iv
表目錄.........................viii
圖目錄.........................ix
第一章 緒論.........................1
1.1 前言.........................1
1.2 研究動機.........................3
第二章理論基礎與文獻回顧.........................5
2.1 堇青石簡介.........................5
2.1.1 堇青石晶體結構介紹.........................5
2.1.2 堇青石特性與應用.........................5
2.1.3 堇青石螢光粉粉體的製備方法.........................6
2.2 螢光材料介紹.........................12
2.2.1螢光粉發光原理.........................12
2.2.2螢光粉的組成.........................12
2.2.3史托克位移.........................12
2.2.4堇青石摻雜活化劑之發光特性.........................13
2.3 影響螢光粉發光因素.........................19
2.3.1主體晶格效應(host effect).........................19
2.3.2缺陷效應(defect effect).........................19
2.3.3濃度淬滅效應 (Concentration quenching).........................20
2.4 研究目的.........................22
第三章 實驗方法與步驟.........................23
3.1實驗過程.........................23
3.1.1實驗材料.........................23
3.1.2實驗流程及步驟.........................24
3.2分析儀器之原理簡介.........................26
3.2.1 X光繞射分析儀(X-ray diffraction, XRD).........................26
3.2.2 X射線電子能譜儀(XPS).........................26
3.2.3 霍氏轉換紅外光譜儀(FT-IR).........................26
3.2.4 熱重分析/熱差掃描量熱分析 (TGA/DSC).........................27
3.2.5 電子順磁共振光譜 (EPR)......................... 27
3.2.6 掃描式電子顯微鏡 ( Scanning Electron Microscopy, SEM)................27
3.2.7 場發射穿透式電子顯微鏡 (FE-TEM).........................27
3.2.8 紫外光/可見光光譜儀(UV-Vis).........................28
3.2.9 螢光光譜儀(Fluorescence spectrophotometer, PL)...................28
第四章 結果與討論 .........................34
4.1 溶膠-凝膠反應.........................34
4.2 XRD 繞射圖分析.........................37
4.2.1不同熱處理溫度條件.........................37
4.2.2摻雜不同活化劑.........................37
4.3 熱重分析(TG)與熱差掃描量熱(DSC)分析.........................45
4.3.1 TGA/DSC曲線圖分析.........................45
4.3.2 DSC曲線之玻璃轉換溫度及活化能計算.........................45
4.4 傅立葉紅外線轉換光譜(FTIR)分析.........................49
4.5 掃描式電子顯微鏡分析(SEM).........................51
4.6 場發穿透式電子顯微鏡分析(TEM).........................56
4.7 電子順磁共振光譜分析(EPR).........................62
4.8 X射線電子能譜儀分析(XPS).........................66
4.9 紫外光/可見光光譜儀分析(UV-Vis).........................72
4.10 螢光光譜儀分析(PL).........................76
4.10.1 PL分析........................76
4.10.2 衰減時間量測分析.........................85
4.10.3 色度座標分析(CIE).........................89
第五章 結論.........................95
參考文獻.........................96
Extended Abstract.........................101

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