本研究利用調整 pH 值方式，使反應物達到均勻混合與分散目的，並以固相反應法搭配氣氛控制合成 (Y1-xTbx)3Al5O12 固溶體，討論晶體結構與螢光性質之間關連性。
第一部份為在無控制氣氛下，合成 (Y1-xTbx)3Al5O12 固溶體，討論藉由大量添加鋱離子進入 YAG 主體結構造成主體轉換，及主體轉換對於鋱離子價數的影響，並同時探討此系統晶體結構與螢光性質。由於鋱離子易失去一電子而產生異價 (Tb4+)，因此在無控制氣氛下會同時存在 Tb3+ 及 Tb4+。研究發現經過 1600oC/16 h 熱處理，可合成純相 YAG-TAG 固溶體，並且隨著鋱離子添加量增加，內部結構逐漸趨穩定，因此鋱離子價數也比較能夠穩定在三價。
第二部份嘗試利用不同氣氛控制，合成 (Y1-xTbx)3Al5O12 固溶體。比較三種不同氣氛下合成之固溶體，其晶體結構及螢光性質。經過 1600oC/16 h 熱處理後，三種氣氛控制下皆已合成純相 YAG-TAG 固溶體。研究結果顯示，從吸收光譜、PL 光譜強度及 ESCA 能譜束縛能高低，皆可判斷四價鋱量多寡，其鋱四價趨勢越明顯，則會影響不同價數鋱離子取代釔離子，進而造成晶格常數值改變。並且由拉曼光譜中可以發現不同價數鋱離子之螢光效應不同，影響拉曼背景值強度；從 SEM 照片則可觀察到 Tb4+ 取代後造成空缺，進而幫助晶粒成長。

This study uses pH controlling to make the reactant well mixed and dispersed, and synthesizes (Y1-xTbx)3Al5O12 solid-solution with solid-state reaction in different atmosphere, discussing the relationships of crystal structure and fluorescence property.

The first part synthesizes (Y1-xTbx)3Al5O12 solid-solution in air without ventilation, discussing the internal crystal structure changes from YAG to TAG, fluorescence property, and the influence of terbium concentration increased on the ion valence. Due to the Tb3+ is easy to lose one electron, the system would have both the Tb3+ and Tb4+. After 1600oC/ 16 h heat treatment, the pure phase of (Y1-xTbx)3Al5O12 solid-solution will be synthesized. The crystal structure is getting stable as the terbium concentration increases, so the valence of terbium will stabilize trivalence.

The second part tries to synthesize (Y1-xTbx)3Al5O12 solid-solution by the different atmosphere controlling. Then compare with their crystal structure and fluorescence property. The pure phase of (Y1-xTbx)3Al5O12 solid-solution can be obtained after 1600oC/16 h heat treatment. The study shows that from the absorption spectrum, the intensity of PL spectrum, and the binding energy in ESCA can determine the Tb4+ content. If the system has more Tb4+, it will influence the cell parameters by terbium substituting yttrium. And it would be observed the different fluorescence effect in Raman spectrum. Furthermore, the Tb4+ substitutes the Y3+ would generate the vacancies to help the grain growth.

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