Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5437976 | Ceramics International | 2017 | 22 Pages |
Abstract
Pairing of large strain response and high d33 with high Tc in (K0.5Na0.5)NbO3-based materials is of high significance in practical applications for piezoelectric actuators. Here, we report remarkable enhancement in the electromechanical properties for (1-x)(K0.52Na0.48) (Nb0.95Sb0.05)O3-xCaZrO3 (KNNS-xCZ) lead-free ceramics through the construction of a rhombohedral (R)-tetragonal (T) phase boundary. We investigated the correlation between the composition-driven phase boundary and resulting ferroelectric, piezoelectric, and strain properties in KNNS-xCZ ceramics. The KNNS-xCZ ceramics with x=0.02 exhibited a large strain response of 0.23% while keeping a relatively large d33 of 237pC/N, which was mainly ascribed to the coexistence of R and T phases confirmed by the XRD and dielectric results. It was found that pairing of large strain response and high d33 in KNN-based materials was achieved. As a consequence, we believe that this study opens the possibility to achieve high-performance lead-free electromechanical compounds for piezoelectric actuators applications.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Zhe Kong, Wangfeng Bai, Peng Zheng, Jingji Zhang, Fei wen, Daqin Chen, Bo Shen, Jiwei Zhai,