臺灣博碩士論文加值系統

鈦（Ti）金屬表面極易氧化形成一層極薄的二氧化鈦(TiO2)，此氧化膜在臨床應用或鑄造上均有重要的影響，但是對於鈦金屬表面氧化膜的研究仍未有明確的解釋，因此雖具有生物材料的優點，在鑄造過程仍充滿難度未能有突破性的發展。本研究目的乃探討四異丙基鈦酸酯（Tetraisopropyl Titanate ,TPT）塗層Ti金屬，藉由改變TPT濃度和熱處理溫度，利用金相顯微鏡探討Ti金屬表面結構變化狀況。以異丙醇為稀釋液配製五種不同的重量比濃度（TPT：異丙醇）1：0、1：1、1：2、1：4、1：8，利用溶凝膠法(Sol-gel method)進行操作，塗付於鈦金屬表面，靜置24小時後進行燒結，溫度分別為100、200、300、500、800、1000℃。燒結後以金相顯微鏡觀察表面。實驗結果在塗層方面藉由金相顯微鏡(OM)觀察，顯示以1：2濃度比塗層最穩定，顆粒分佈較平均，試片表面保持勻稱狀態。掃瞄式電子顯微鏡（SEM）觀察顯示，在800℃以下TPT與鈦並未結合，但燒至1000℃，TPT與鈦金屬有結合在一起。在氧化膜觀察方面，500℃燒結後金屬表面開始有紫色出現，但繼續燒至800℃時紫色顏色消失，但顏色的顯現不因濃度而受影響。不同燒結溫度所形成之氧化膜厚度不同，因此所顯現不同的顏色乃因鈦表面受還原氧化反應影響，氧化膜形成厚度大小不同及TiO2或TiO2-x結晶相產生光線的折射不同，光線干涉現象造成。
關鍵詞; 溶凝膠法、鈦金屬、四異丙基鈦酸酯 、二氧化鈦

The surface of titanium easily tends to oxidizing as to form a thin layer of titanium dioxide and this oxidation membrane has important influence on clincial applications or casting process. The surface oxidation membrane of titanium has not definitely explained yet. Titanium owns the advantages of biologic material, the titanium is full of difficulties during casting process and fails to have a break-through development , though. The aim of this study is to elucidate the condition of the structure on the surface of titanium by coating thin Tetraisopropyl Titanate (TPT) with different concentrations, different heat treatments, and investigating by optical microscope.
5 kinds of weight ratio concentration were prepared(TPT: Iso-Propyl alcohol )1:0、1:1、1:2、1:4、1:8 with isopropyl alcohol as diluted solution, coated by Sol-gel method , sintered by different temperatures 100, 200, 300, 500, 800, and 1000℃,and then observed the surface of titanium metal with optical microscope. The results demonstrated that the stability was the best with 1:2 concentration, the TPT particals scattered equally, the surface of the sample kept equal condition, and observed with SEM, the TPT and Titanium bound together sintered by 1000℃,not by 800℃or below.
It was observed that the metal surface was turning purple when sintering by 500℃, and when it was kept sintering to 800℃,the color disappeared. But the appearance of the color was not affected by its concentration. but by its sintering temperature This result suggested that variation of sintering temperature formed various thickness of oxidation membrane. The main conclusion from the aforementioned information is that influencing factors of the apperance of colours of surface of titanium metal are as follows: First, produce oxidation -reduction reaction, and is responsible for variation of thickness of oxidation membrane formation, and second , multiple light diffraction and interference effects were due to crystal phase on TiO2 or TiO2-X .

第一章 緒論
第二章 文獻回顧
2-1 鈦金屬的儲存
2-2 鈦金屬的生產與製造
2-3 鈦金屬的物理性質
2-4鈦金屬和鈦合金
2-5鈦金屬與鈦合金在牙科上的應用
2-6牙科鈦金屬與鈦合金的鑄造
2-6-1鈦金屬鑄造的困難點
2-6-2鑄造的種類
2-6-3鈦金屬鑄造的缺陷
2-6-4防止鈦金屬鑄造缺陷的對策
2-7 生物效應(Biologic Effects)
2-8 陶瓷融合鈦金屬補綴物(Porcelain fused to titanium restoration)
2-9 鈦金屬植體塗層氫氧基磷灰石(Hydroxyapatite)
2-10 四異丙機鈦酸酯Tetraisopropyl Titanate (TPT ) 的性質
第三章 材料及方法
3-1 材料與設備
3-2 實驗方法
3-2-1鑄件試片的製作
3-2-2 TPT的Coating及燒結
3-2-3 塗層燒結後的觀察
第四章 結果
第五章 討論
第六章 結論
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