Wang Wugang, Chen Zhengran, Zhou Zhiyong, Li Yaoguo, Liang Ruihong
Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, People's Republic of China.
Laboratory of Science and Technology on Marine Navigation and Control, China State Shipbuilding Corporation, 268 Dingzigu First Road, Hongqiao District, Tianjin 300131, People's Republic of China.
ACS Appl Mater Interfaces. 2023 Mar 29;15(12):15636-15645. doi: 10.1021/acsami.2c19802. Epub 2023 Mar 17.
Defect engineering is a proven method to tune the properties of perovskite oxides. In demanding high-power piezoelectric ceramic applications, acceptor doping is the most effective method to harden ceramics, but it inevitably degrades the ceramics' electromechanical properties. Herein, a poling method based on acceptor doping, namely, high-temperature poling, is implemented by applying an electric field above the Curie temperature for poling to achieve a balance of the properties of piezoelectric coefficient and mechanical quality factor . After high-temperature poling, the piezoelectric property of 0.6 mol % Mn-doped PbSr(ZrTiNb)O is = 483 pC/N and = 448. Compared with the traditional poling, the piezoelectric coefficient of the high-temperature poling ceramics increased by approximately 40%, and also increased by nearly 18%. Therefore, high and were exhibited by our PZT piezoelectric ceramics. Rayleigh's law analysis, XRD, and transmission electron microscopy analysis show that, after high-temperature poling, the considerably increased is related to the large increase in the reversible domain wall motion in the intrinsic effect, while the slightly increased is related to the inhibited irreversible domain wall motion in the extrinsic effect. This study reports a method for high-temperature poling and provides insights into the design of high-power piezoelectric ceramics with high and .
缺陷工程是一种已被证实的调节钙钛矿氧化物性能的方法。在高功率压电陶瓷应用中，受主掺杂是使陶瓷变硬的最有效方法，但这不可避免地会降低陶瓷的机电性能。在此，通过在居里温度以上施加电场进行极化，实现了一种基于受主掺杂的极化方法，即高温极化，以实现压电系数和机械品质因数性能的平衡。高温极化后，0.6摩尔%锰掺杂的PbSr(ZrTiNb)O的压电性能为d33 = 483 pC/N和Qm = 448。与传统极化相比，高温极化陶瓷的压电系数d33提高了约40%，Qm也提高了近18%。因此，我们的PZT压电陶瓷表现出了高d33和Qm。瑞利定律分析、XRD和透射电子显微镜分析表明，高温极化后，显著增加的d33与本征效应中可逆畴壁运动的大幅增加有关，而略有增加的Qm与非本征效应中不可逆畴壁运动的抑制有关。本研究报道了一种高温极化方法，并为设计具有高d33和Qm的高功率压电陶瓷提供了见解。
