臺灣博碩士論文加值系統

本實驗使用Pb1-xSrx(Zr0.55Ti0.44Nb0.01)O3系(簡稱為PZT)壓電材料為對象，以CuO與CeO2作為低溫燒結添加劑。觀察其結果發現添加CuO具有促進PZT陶瓷的燒結能力，降低燒結溫度由1200降低到1000℃。
微量CuO的添加對燒結體的密度具有相當大的影響。於1000℃同樣的燒結溫度下其介電及壓電性質優於無添加物的材料。另外隨著CuO的添加量增加機電耦合因數(kr)與介電常數(K)比較以無添加劑的材料於1200℃的略微降低；但是於添加量0.3與0.5wt%有較佳的機械品質因數(Qm)值與損失因數(tan δe)值；壓電性質最佳點為CuO添加0.3wt%摻雜的PZT試片。CuO添加過程材料結晶相傾向於形成菱型晶型結構，晶粒大小隨著添加物增加而減小。
CuO與CeO2的添加對樣品燒結體密度與晶粒尺寸有著明顯的影響，另外，當提高CeO2的添加量則晶粒尺寸逐漸減小但是試片燒結體密度反而逐漸提高。根據XRD繞射結果意味著CeO2的添加具有提昇PZT高溫穩定性的功能，皆呈現為多晶型的鈣鈦礦結構。

Low temperature sintering of the ternary Pb1-xSrx(Zr0.55Ti0.44Nb0.01)O3 (abbreviated as PZT) ceramics was investigated using CuO and CeO2 as sintering additives. It was found that the addition of CuO significantly improved the sintering ability of PZT ceramics, resulting in a reduction of sintering temperature from 1200 to 1000 ℃. The density of sintered sample was strongly affected by small amounts of CuO addition. The dielectric and piezoelectric constants of PZT ceramics doped with CuO were higher than that of pure ones in the same sintering temperature, 1000 ℃. On the other hand, with the increasing of CuO addition, the electromechanical coupling factor (kr) and dielectric constant (K) were slightly decreased than that of pure ones in the sintering temperature 1200℃, but mechanical quality (Qm) and dielectric loss (tan δe) were optimized at 0.3 and 0.5 wt.% . The improvement of piezoelectric properties was maximized at various 0.3 wt% doped PZT samples.The materials are transformed from the tetragonal to the rhombohedral structure, and the grain sizes are decreased when additives are added.
The density and grain size of sintered sample was strongly affected by small amounts of CuO and CeO2 addition. On the other hand, with the increasing of CeO2 addition, grain size was decreased but density slightly increasing. From the X-ray diffraction analysis, significantly improved the thermal stable of PZT ceramics in high temperature, single phase of polycrystalline Perovskite was confirmed.

誌謝 ………………………………………………………………………i
中文摘要 …………………………………………………………………ii
Abstract………………………………………………………………iii
目錄 ………………………………………………………………………v
表目錄 ……………………………………………………………………ix
圖目錄 ……………………………………………………………………x
第一章 前言………………………………………………………………1
1-1 研究動機……………………………………………………………1
1-2 研究目的……………………………………………………………2
第二章 前人研究及理論基礎………………………………………3
2-1 壓電材料……………………………………………………………3
2-1-1 發展簡介…………………………………………………………3
2-1-2 壓電材料分類……………………………………………………4
2-2 壓電理論基礎………………………………………………………5
2-2-1 壓電的產生………………………………………………………5
2-2-2 壓電材料特性[1] ………………………………………………5
2-2-3 壓電材料常用的特性參數………………………………………6
2-3 PZT 壓電材料………………………………………………………10
2-4 PZT 三元系壓電材料………………………………………………11
2-5 低溫燒結PZT材料…………………………………………………12
2-5-1 低溫燒結的目的…………………………………………………12
2-5-2 低溫燒結的方法…………………………………………………13
2-5-3 使用添加劑的方法………………………………………………14
第三章 實驗方法與步驟 …………………………………………………23
3-1 使用材料………………………………………………………23
3-2 PZT陶瓷粉………………………………………………………23
3-2-1 PZT煆燒粉製備……………………………………………23
3-2-2 添加劑摻混粉……………………………………………………23
3-2-3 造粒………………………………………………………………24
3-2-4 樣品命名…………………………………………………………24
3-3 試片製作………………………………………………………25
3-3-1 試片成型 ………………………………………………………25
3-3-2 熱脫脂……………………………………………………………25
3-3-3 燒結………………………………………………………………25
3-3-4 電極製作…………………………………………………………26
3-3-5 試片極化…………………………………………………………26
3-4 性質檢測與分析………………………………………………26
3-4-1 晶相分析…………………………………………………………26
3-4-2 粒徑及微結構分析………………………………………………27
3-4-3 試片燒結體收縮率量測…………………………………………27
3-4-4 密度量測…………………………………………………………27
3-4-5 熱膨脹儀分析……………………………………………………28
3-4-6 熱示差/熱重( DTA / TG )分析………………………………28
3-4-7 電性量測及分析…………………………………………………28
第四章 實驗結果與討論 ……………………………………………33
4-1 材料特性……………………………………………………………33
4-1-1 PZT煆燒粉……………………………………………………33
4-1-2 研磨時間的影響………………………………………………33
4-1-3 添加劑……………………………………………………………34
4-2 試片生胚……………………………………………………………34
4-2-1 煆燒粉生胚……………………………………………………34
4-2-2 添加劑摻混之生胚………………………………………………36
4-3 熱示差/熱重(DTA/TG)分析…………………………………………37
4-3-1 煆燒粉……………………………………………………………38
4-3-2 CuO摻混的試片………………………………………………38
4-3-3 CuO搭配CeO2摻混的試片……………………………………39
4-4 熱膨脹儀(DIL)分析…………………………………………………40
4-4-1 煆燒粉試片………………………………………………………40
4-4-2 CuO摻混的試片………………………………………………41
4-4-3 CuO搭配CeO2摻混的試片……………………………………41
4-5 試片燒結性質………………………………………………………42
4-5-1 煆燒粉試片……………………………………………………42
4-5-2 CuO摻混的試片……………………………………………45
4-5-3 CuO搭配CeO2摻混的試片……………………………………50
4-6 壓電特性……………………………………………………………54
4-6-1 煆燒粉成型試片…………………………………………………54
4-6-2 CuO摻混的試片………………………………………………55
4-6-3 CuO搭配CeO2摻混的試片……………………………………57
第五章 結論與建議………………………………………………………160
5-1 結論…………………………………………………………………160
5-2 未來工作與建議…………………………………………………161
參考文獻 …………………………………………………………………163
自述 …………………………………………168

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