Nie Jingkai, Qiu Ning, Zhang Shicheng, He Qiang, Chen Xiaogang, Han Yu, Tian Yi, Tian Chen
China Electric Power Research Institute, Beijing 100192, China.
State Key Laboratory of Advanced Power Transmission Technology, Beijing 102209, China.
ACS Omega. 2025 Aug 22;10(34):38995-39001. doi: 10.1021/acsomega.5c05074. eCollection 2025 Sep 2.
In response to the demand for lead-free replacement of multilayer piezoelectric actuators (MLAs), KNN-based lead-free piezoceramics with high curie temperatures and environmental friendliness are selected for the application study. To improve the piezoelectric properties of piezoelectric ceramics, a texture approach was adopted, and 0.2% CuO was added as a sintering aid; the TGG texturing technique was combined with the stacked element cofiring technique. Finally, we investigate the relevant properties of KNN-based multilayer piezoelectric actuators. Here, a compositional system of 0.96-(NaK)-(NbSb)-O-0.01CaZrO-0.03-(KBiHfO) (KNNS-KBH-CZ) was chosen to fabricate multilayer piezoelectric actuators. The texturing degree of KNNS-KBH-CZ/CuO reaches as high as 75%, leading to a high strain performance (strain of 0.14%, * of 466 pm/V) under a low electric field (3 kV/mm), highlighting the potential application of KNN-based piezoelectric ceramics in the field of piezoelectric actuators.
为响应多层压电致动器（MLA）无铅替代的需求，选择了具有高居里温度和环境友好性的基于KNN的无铅压电陶瓷进行应用研究。为了改善压电陶瓷的压电性能，采用了织构化方法，并添加了0.2%的CuO作为烧结助剂；将TGG织构化技术与叠层元件共烧技术相结合。最后，研究了基于KNN的多层压电致动器的相关性能。在此，选择了0.96-(NaK)-(NbSb)-O-0.01CaZrO-0.03-(KBiHfO)（KNNS-KBH-CZ）的成分体系来制造多层压电致动器。KNNS-KBH-CZ/CuO的织构化程度高达75%，在低电场（3 kV/mm）下具有高应变性能（应变0.14%，d*为466 pm/V），突出了基于KNN的压电陶瓷在压电致动器领域的潜在应用。
