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| 研究生： |
翁瑞坪 Ran-Pen Wo |
|---|---|
| 論文名稱： |
鎢酸鋯陶瓷之製作 |
| 指導教授： |
陳志臣
Jyh-Chen Chen |
| 口試委員: | |
| 學位類別： |
碩士 Master |
| 系所名稱： |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 畢業學年度： | 88 |
| 語文別： | 中文 |
| 論文頁數： | 66 |
| 中文關鍵詞： | 負熱膨脹係數 、熱補償元件 |
| 相關次數： | 點閱：4 下載：0 |
| 分享至: |
| 查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
本研究將氧化鎢與氧化鋯以適當的化學計量比均勻混合，利用固態燒結的方法製作鎢酸鋯陶瓷。首先以X光粉末繞射檢測陶瓷的組成和熱分析儀量測陶瓷熱膨脹係數，找出最佳的燒結時間，接著以光學顯微鏡及掃瞄式電子顯微鏡觀察陶瓷內部微觀性質，最後再以軟體程式作熱傳模擬分析，經過程式分析與陶瓷實作的交互偵錯，開發出良好的陶瓷製程技術，一方面可維持鎢酸鋯的高負熱膨脹特性，另一方面則可獲得高緻密性與高強度的陶瓷，適合後續的加工與複合材料應用。
由實驗的結果，可知將生胚放置在加熱爐內，以每分鐘5℃的升溫速率，燒結停留4小時再迅速取出放在空氣中冷卻，可得效果不錯的負熱膨脹效應。由於氧化鎢在高溫會發生揮發的情形，間接影響陶瓷到的機械性質，所以在生胚的上方加蓋，改善氧化鎢在高溫時的揮發情形，陶瓷之燒結停留時間將延長至8小時，其熱膨脹數不僅可達 -10 ×10-6K-1以上，而且其內部反應較均勻，空孔出現的情形也明顯的減少，加工時也可發覺其機械強度有明顯的增加。
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