Piezoelectric and ferroelectric properties of (Bi,Na)TiO₃-(Bi,Li)TiO₃-(Bi,K)TiO₃ ceramics for accelerometer application

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• 作者：Gyoung-Ja Lee ; Byung-Hoon Kim ; Sun-A Yang ; Jin-Ju Park ; Sang-Don Bu and Min-Ku Lee
• 刊名：Journal of the American Ceramic Society
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：100
• 期：2
• 页码：678-685
• 全文大小：2028K
• ISSN：1551-2916

文摘

The piezoelectric and ferroelectric properties of 0.76(Bi_0.5Na_0.5)TiO₃–0.04(Bi_0.5Li_0.5)TiO₃–0.2(Bi_0.5K_0.5)TiO₃ (abbreviated as 0.76BNT–0.04BLT–0.2BKT) ceramics were investigated to clarify the optimal sintering temperature, and the vibration characteristics were examined for a compression-mode accelerometer assembly in which 0.76BNT–0.04BLT–0.2BKT ceramics sintered at the optimized temperature served as the piezoelectric elements. The increase in the grain size of the 0.76BNT–0.04BLT–0.2BKT ceramics with the sintering temperature provides a beneficial contribution to the piezoelectric coefficient; however, it detrimentally contributes to the depolarization temperature. The charge sensitivity of the prototype accelerometers was evaluated with changes in the seismic mass and the layer number of the piezoceramics. The deviation between the theoretical and measured values of charge sensitivity was less than 10%.