研究生: |
陳美瑜 Mei-Yu Chen |
---|---|
論文名稱: |
A(B’1/3B”2/3)O3介電陶瓷之微觀結構與微波特質關聯性研究 Correlation of Micro-Structural Properties With Microwave Characteristics of A(B’1/3B”2/3)O3 Perovskite Ceramics |
指導教授: |
賈至達
Chia, Chih-Ta |
學位類別: |
碩士 Master |
系所名稱: |
物理學系 Department of Physics |
論文出版年: | 2006 |
畢業學年度: | 94 |
語文別: | 中文 |
論文頁數: | 62 |
中文關鍵詞: | 拉曼 、鈣鈦礦 、介電性質 、光學特性 |
英文關鍵詞: | Raman scattering, perovskite, dielectric properties, optical properties |
論文種類: | 學術論文 |
相關次數: | 點閱:163 下載:1 |
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本文利用拉曼散射、X光繞射和延伸X光吸收譜等光學方法來測量A(B’1/3B”2/3)O3鈣鈦礦陶瓷中氧八面體結構、 1:2有序結構與其微波性質的關連性。樣品共有三組,第一組樣品為不同燒結條件的Ba(Mg1/3Ta2/3)O3。此組樣品皆為Q×f值非常高的樣品,X光繞射分析發現1:2有序程度高其Q×f值越高。此組Ba(Mg1/3Ta2/3)O3樣品的微觀結構非常相近,氧八面體體積差異無法由拉曼散射和X光吸收實驗解析。第二組樣品為鎳掺雜之Ba(Mg1/3Ta2/3)O3,即xBa(Ni1/3Ta2/3)O3 +(1-x)Ba(Mg1/3Ta2/3)O3 (x=0~0.03)。X光吸收譜可以很明確知道鎳原子是取代鎂原子的晶格位置,而當鎳掺雜濃度越多時,氧八面體越緊密,此時介電常數也隨之減小;且鎳掺雜的越多,1:2有序結構被破壞的程度愈高,Q×f值也隨之降低。第三組樣品是燒結溫度介於1350~1550oC的五個Ba(Co1/3Nb2/3)O3陶瓷樣品。當燒結溫度為1400oC時,實驗發現Ba(Co1/3Nb2/3)O3具有最小的介電常數和最大的Q×f值。此樣品的氧八面體也最緊密、1:2有序程度也最好。燒結溫度高於1400oC之樣品,介電常數開始變大、Q×f值變小,且氧八面體結構開始鬆散、1:2有序程度變差。實驗顯示燒結條件會強烈的影響到晶體內氧八面體結構與1:2有序程度,其微波特性與氧八面體微觀結構直接相關。
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[2]Y.-C. Chen, H.-F. Huang, H.-L. Lin, C.-T. Chia, I.-N. Lin, “Correlation of microwave dielectric properties and normal vibration modes of xBa(Mg1/3Ta2/3O3–(1-x) Ba(Mg1/3Nb2/3)O3 ceramics: II. Infrared spectroscopy”, J. Appl. Phys., 94 (2003), 3365-3369.
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[7]M. Y. Chen, C. T. Chia, I. N. Lin, L. J. Lin, C. W. Ahn, Shan Nahm, “Microwace properties of Ba(Mg1/3Ta2/3)O3, Ba(Mg1/3Nb2/3)O3, Ba(Co1/3Nb2/3)O3 ceramics revealed by Raman scattering”, J. Eur. Ceram. Soc., 26 (2006), pp 1965-1968
[8]H. F. Cheng, C. T. Chia, H. L. Liu, M. Y. Chen, Y. T. Tzeng, “Correlation of microwave dielectric properties with Raman and FTIR spectroscopies for Ba(Mg1/3Ta2/3)O3 materials”, J. Appl. Phy, 2006, (in press)
[9]M. Y. Chen, P. J. Chang, C. T. Chia, Y. C. Lee, I. N. Lin, J . F. Lee, T. Shimada, “Extend X-ray absorption fine structure and Raman analysis of Nickel doped Ba(Mg1/3Ta2/3)O3”, J. Eur. Ceram. Soc., 2006 (in press)