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研究生:邱韻芳
研究生(外文):Yun-Fang Chiu
論文名稱:Pb(Zr0.52Ti0.48)O3-Pb(Mn1/3Sb2/3)O3-Pb(Zn1/3Nb2/3)O3陶瓷之製作及其在壓電變壓器的應用
論文名稱(外文):Fabrications of Pb(Zr0.52Ti0.48)O3-Pb(Mn1/3Sb2/3)O3-Pb(Zn1/3Nb2/3)O3 Ceramics and Their Applications on the Piezoelectric Transformers(PT)
指導教授:朱聖緣朱聖緣引用關係
指導教授(外文):Sheng-Yuan Chu
學位類別:碩士
校院名稱:國立成功大學
系所名稱:電機工程學系碩博士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:112
中文關鍵詞:壓電變壓器介電特性微結構分析
外文關鍵詞:Piezoelectric transformerMicrostructure analysisDielectric properties
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鋯鈦酸鉛(PZT)為最普遍被廣泛應用之壓電材料。本實驗中採用屬於hard piezoelectric的PMS及soft piezoelectric的PZN兩組成,探討PMS含量的增加對PZT-PMS-PZN系統的影響,及添加氧化銅(CuO)對0.9PZT-0.1PMS之影響。實驗結果在PMS為4mole%時,有較佳的機電耦合因數,其徑向機電耦合因數(kp)和厚度機電耦合因數(kt)皆為51%,機械品質因數(Qm)為1060,居里溫度為305°C,經由電滯曲線量測其Ec值為6.57kV/cm,Pr值為23.3μC/cm2。添加CuO做液相燒結,在0.3wt%時有較好的徑向機電耦合因數(kp)和厚度機電耦合因數(kt),分別為30%和32%,機械品質因數為1181,居里溫度為255°C,經由電滯曲線量測其Ec值為6.23kV/cm,Pr值為12.7μC/cm2。本實驗亦成功的以.9PZT-4%PMS-6%PZN組成,製作出壓電變壓器元件,並量得其匹配負載電阻為7kΩ時,有最大轉換效率94.8%,且成功點亮14瓦T5螢光燈管。
PZT is the most common piezoelectric material. In this report, we choose the hard piezoelectric material, PMS, and the soft piezoelectric material, PZN, investigating the PMS content in the PZT-PMS-PZN system. Also, we investigate the doping effect by introducing CuO into 0.9PZT-0.1PMS ceramics.The result shows that 4 mole% PMS has the better electromechanical planar and thickness coupling coefficients of kp =51% and kt=51%, the mechanical quality factor Qm=1060, and the Curie temperature Tc=305°C. According to the P-E measurements, the coercive flied and remanent polarization are 6.57kV/cm and 23.3μC/cm2. The CuO doped with 0.3wt% CuO provide the electromechanical planar and thickness coupling coefficients of kp =30% and kt=32%, the mechanical quality factor Qm=1181, and the Curie temperature Tc=255°C. According to the P-E measurements, the coercive flied and remanent polarization are 6.23kV/cm and 12.7μC/cm2, respectively. In this report, we successfully fabricated the piezoelectric transformer with the 0.9PZT-4%PMS-6%PZN substrates. The matching load of the piezoelectric transformer is 7kΩ, and the efficiency can reach 94.8%,where the theoretical efficiency is 97.1%. Also, a 14W fluorescent lamp was successfully driven using the fabricated piezoelectric transformer.
目錄
摘要 I
Abstract II
目錄 VI
圖目錄 IX
表目錄 XV
第一章 緒論 1
1.1 研究背景與動機 1
1.2 液相燒結 8
1.3 論文架構 10
第二章 原理 11
2.1 壓電效應 11
2.1.1 正壓電效應(Direct piezoelectric effect) 11
2.1.2 逆壓電效應(Converse piezoelectric effect) 11
2.2 壓電諧振體 14
2.3 壓電材料之種類與ABO3陶瓷材料 16
2.4 壓電特性參數 19
2.4.1 機電耦合因數(electromechanical coupling factor, K) 19
2.4.2 機械品質因數(mechanical quality factor) 20
2.5 介電原理 21
2.5.1 介電理論 21
2.5.2 介電損失(dielectric loss) 22
2.6 鐵電效應 27
2.6.1 電滯曲線 27
2.7 壓電變壓器基本原理 30
2.7.1 壓電變壓器工作原理 30
2.7.2 壓電變壓器等效電路及模型分析 30
第三章 製程步驟與量測 35
3.1陶瓷體的製備 35
3.2 壓電變壓器的製作 39
3.3陶瓷體特性分析與量測 40
3.3.1 XRD 40
3.3.2 SEM 40
3.3.3 密度 40
3.3.4 電性量測 41
3.3.5 溫度特性量測 47
3.4 壓電變壓器量測 48
第四章 結果與討論 50
4.1 PZT-PMS-PZN陶瓷特性 51
4.1.1 微結構---XRD、結構及c/a ratio分析 51
4.1.2 SEM分及密度分析 57
4.1.3 居里溫度TC、介電常數εr與介電損失tanδ分析 60
4.1.4 壓電特性參數分析 67
4.1.5 頻率溫度係數TCF 72
4.1.6 電滯曲線P-E 73
4.2 CuO doped PMnN-PZT陶瓷特性 75
4.2.1 微結構---XRD、結構分析及密度 75
4.2.2 SEM分析 79
4.2.3 居禮溫度Tc、介電常數εr與介電損失tanδ分析 82
4.2.4 壓電特性參數分析 89
4.2.5 頻率溫度係數TCF 93
4.2.6 電滯曲線P-E 94
4.3 壓電變壓器之特性 96
4.3.1 等效電路參數 96
4.3.2 實際量測結果 99
第五章 結論 102
5.1 結論 102
5.2 未來研究方向 104
參考文獻 105
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