研究生: |
徐昱櫸 |
---|---|
論文名稱: |
TiO2添加對鋰鋁矽酸鹽系玻璃陶瓷結晶機制之研究 |
指導教授: |
胡塵滌
Chen-Ti Hu |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
工學院 - 材料科學工程學系 Materials Science and Engineering |
論文出版年: | 2004 |
畢業學年度: | 92 |
語文別: | 中文 |
論文頁數: | 92 |
中文關鍵詞: | 玻璃陶瓷 、鋰鋁矽酸鹽系玻璃陶瓷 、結晶機制 、孕核劑 、透光性 |
外文關鍵詞: | glass-ceramics, lithium aluminosilicate, crystallization, nucleation agent, transmittance |
相關次數: | 點閱:3 下載:0 |
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鋰鋁矽酸鹽系玻璃陶瓷為一具備超低甚至為負熱膨脹係數的材料,本研究是以氧化鋰、氧化鋁、氧化矽粉末為基材,添加氧化硼降低玻璃熔點,並添加氧化鈦(TiO2)作為孕核劑,探討降低製備溫度後鋰鋁矽酸鹽系玻璃陶瓷的結晶機制;添加TiO2孕核劑會使鋰鋁矽酸鹽系玻璃陶瓷的結晶機制由表面成核轉變為體成核,添加量須大於7wt%才有較明顯的效果,利用適當的兩階段熱處理可以達到細化晶粒的目的。
利用DTA量測分析計算孕核與結晶的機制,並設計兩階段熱處理條件,「低溫孕核、高溫成長」,以期得到可透光之細小晶粒;觀察穿透光譜的穿透率、顯微結構,並利用X光繞射計算晶粒尺寸,最後比較透光率與晶粒尺寸之關係。
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