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| 研究生： |
吳承德 Wu, Cheng-De |
|---|---|
| 論文名稱： |
氧化鈰與氧化鉻共添加對鍶鋇鈮陶瓷結構與介電性質之影響 Effects of Ceria and Chromia Co-Doped on the Crystalline Structure and Dielectric Properties of Strontium Barium Niobate Ceramics |
| 指導教授： |
向性一
Hsiang, Hsing-I |
| 學位類別： |
碩士 Master |
| 系所名稱： |
工學院 - 資源工程學系 Department of Resources Engineering |
| 論文出版年： | 2007 |
| 畢業學年度： | 95 |
| 語文別： | 中文 |
| 論文頁數： | 96 |
| 中文關鍵詞： | 鍶鋇鈮 、結構 、介電 |
| 外文關鍵詞： | crystalline structure, SBN, dielectric |
| 相關次數： | 點閱：65 下載：1 |
| 分享至: |
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鍶鋇鈮陶瓷是一種很好的透光材料，已可應用於工業上。雖然鍶鋇鈮單晶已被廣泛的研究，但因高價格與製造困難，實際的應用被限制住。一個陶瓷的高密度和均勻微結構，對光學應用上是極大的須求。因此開發鍶鋇鈮多晶陶瓷是必然趨勢。
在鍶鋇鈮陶瓷中共添加Ce2O3、Cr2O3，探討其結構與介電性質。隨添加量上升，晶格常數a軸拉長，c軸縮。在介電性質，Ce2O3、Cr2O3添加量增加，Tmax與εmax遞減，為SBN中NbO6八面體結構的改變。利用電滯曲線求出殘留極化量，得知隨添加量增加，殘留極化量減少，和εmax變化行為相同。
Strontium barium niobate ( SBN ) ceramic is a good electro-optic material and has been widely used. Although SBN single crystals could be used in wide applications, high cost and difficult fabrication have limited its practical use. For optical applications, a ceramic with almost full density and uniform microstructure is greatly desired.
Strontium barium niobate co-doped Ce2O3、Cr2O3 is investigated into the crystalline structure and the dielectric properties. Due to the increase of the quantity of the additive, the a axis is increased, but the c axis is decreased. In the dielectric properties, Tmax and εmax decreased with the increase of the content of Ce2O3、Cr2O3, which is essentially determined by the structural change of the NbO6 units in SBN. The remanent polarization is studied by the Hysteresis loop. Due to the increase of the quantity of the additive, decrease the remanent polarization.
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校內：2008-07-13公開校外：2009-07-13公開