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.

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