ABSTRACT In this study, in order to develop the composition ceramics for ultrasonic sensor application, Pb0.985Bi0.01(Co1/2W1/2)0.03(Ni1/3Nb2/3)0.09(ZrxTi1-x)0.88O3+0.25wt% CuO (abbreviated as PCW-PNN-PZT) system ceramics were prepared with the variations of x and then their phase microstructure, piezoelectric and dielectric characteristics were investigated with the variations of x. The compositions near the morphotropic phase boundary (MPB) appeared when x = 0.495. Moreover, the PCW-PNN-PZT ceramics could be sintered at low temperature of 920°C by adding sintering aids CuO. At sintering temperature of 920°C and x = 0.495 specimen, the density (ρ), electromechanical coupling factor(kp), dielectric constant (ϵr), mechanical quality (Qm) and piezoelectric constant (d33) piezoelectric figure of merit (d33·g33) indicated the optimal value of 7.94 g/cm3. 0.65, 1959, 356, 486 pC/N, and 15.56 [pm2/N], respectively, suitable for ultrasonic sensor application. The CuO was proved to lower the sintering temperature of piezoelectric ceramics due to the effects of PbO and CuO liquid phase.

中文翻译：

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低温烧结PCW-PNN-PZT陶瓷的压电性能

摘要 在本研究中，为了开发用于超声波传感器的复合陶瓷，Pb0.985Bi0.01(Co1/2W1/2)0.03(Ni1/3Nb2/3)0.09(ZrxTi1-x)0.88O3+0.25wt% CuO (简称PCW-PNN-PZT)体系陶瓷随着x的变化制备，然后研究了它们随x变化的相微观结构、压电和介电特性。当 x = 0.495 时，出现了同型相界 (MPB) 附近的成分。此外，PCW-PNN-PZT陶瓷可以通过添加烧结助剂CuO在920°C的低温下进行烧结。在 920°C 的烧结温度和 x = 0.495 试样，密度 (ρ)、机电耦合因子 (kp)、介电常数 (ϵr)、机械质量 (Qm) 和压电常数 (d33) 压电品质因数 (d33· g33) 表示最佳值 7。94 克/立方厘米。分别为 0.65、1959、356、486 pC/N 和 15.56 [pm2/N]，适用于超声波传感器应用。由于PbO和CuO液相的作用，CuO被证明可以降低压电陶瓷的烧结温度。