本實驗乃使用實驗室所開發的低溫燒結陶瓷材料，以tape casting的手法製作出單片80μm陶瓷生胚（green tape），但其單層機械強度不足，故將其堆疊均壓再燒結可得厚度250μm之薄片，再利用SEM、壓電參數分析薄片與塊體的差異。隨著燒結溫度的變化，材料及壓電特性也隨之改變，進而改變壓電變壓器特性。
實驗樣品單層的壓電變壓器其尺寸為長2.7mm寬2.7mm高0.4mm，所設計的壓電變壓器結構只需將輸出入調換即可達到升降壓之目的，樣品燒結溫度分別為860℃、880℃、900℃三個溫度點，發現單層結構下power隨kp上升而上升，Qm上升Gain反而下降，實驗發現在880℃最佳負載100Ω時power 0.97w可達gain 0.52，故討論疊層數對壓電變壓器的影響時固定燒結溫度為880℃，實驗結果可得隨著疊層數增多，power隨之變大並可提昇其效率且使負載電阻的範圍增大。但隨著疊層數增加gain亦隨之上升使得降壓效果變差。以低溫共燒技術製備五層壓電變壓器降壓可得最大power 11 w、最大效率96%，並實際連接壓電變壓器於驅動電路直接充電手機。

The material of piezoelectric transformer in this work was prepared by low temperature co-fire ceramics technology according to our previous study. A 80 μm thickness green tape was casted by the tape casting method. Owing to the low mechanical strength, 4 layers green tape had been stacked to increase the mechanical strength. The difference between bulk and tape can be verified by SEM, piezoelectric properties. The piezoelectric properties change along with the different sintering temperature, which would change the properties of the piezoelectric transformers.
The dimension of the piezoelectric transformer is 2.7mm*2.7mm*0.4mm. By designing proper silver paste pattern of the piezoelectric transformer the mode of step-up or step-down can be adjusted by alternative the input and output. The sintering temperature are 860℃、880℃、900℃ respectively. In the single layer structure of piezoelectric transformer the power increase with the increasing kp, on the contrary the Gain decrease with the increasing Qm.
According to the experiment result, when the best load is 100Ω the power and gain are 0.97w and 0.52 respectively. The sintering temperature of the multilayer piezoelectric transformer was fixed at 880.When the layer increases, the power and efficiency increased, in the same time the tolerance of the load increased also. The step-down ratio increased while the increasing layers. The 5-layers piezoelectric transformer was fabricated by low temperature co-fire ceramics technology. The power and efficiency are 11 w and 96% which was connected to driving circuit to charge a cell phone.

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