@article{Li2024, 
author = {Kai Li and Shan Cong and Lang Bian and Zhenting Zhao and Jie Wu and Junfeng Zhao and Duoduo Zhang and Haijuan Mei and Enwei Sun and Xudong Qi and Weiping Gong and Bin Yang},
title = {Simultaneous enhancement of piezoelectricity and temperature stability in Pb(Ni1/3Nb2/3)O3–PbZrO3–PbTiO3 piezoelectric ceramics via Sm-modification},
year = {2024},
journal = {Journal of Advanced Ceramics},
volume = {13},
number = {10},
pages = {1578-1589},
keywords = {temperature stability, piezoelectricity, Sm-doping, domain structures, PNN–PZ–PT ceramics},
url = {https://www.sciopen.com/article/10.26599/JAC.2024.9220958},
doi = {10.26599/JAC.2024.9220958},
abstract = {The development of piezoelectric ceramics characterized by both large piezoelectric response and high-temperature stability is imperative for the advancement of practical electromechanical devices. However, existing high-performance piezoelectric ceramics often encounter compromised temperature stability because ferroelectric phase transitions occur within low-temperature regions. In this work, we focused on Sm-doped Pb(Ni1/3Nb2/3)O3–PbZrO3–PbTiO3 (PNN–PZT:Sm) ceramics with a tetragonal (T)-phase structure to achieve the desired combination of high piezoelectricity and high temperature stability. The results indicate that 2 mol% Sm-doped samples exhibit a large piezoelectric constant (d33) of 575 pC/N, an effective piezoelectric strain coefficient (d33*) of 890 pm/V, and a high ferroelectric-to-paraelectric phase transition temperature (Tm) of 279 °C. Remarkably, d33 experiences only a 2.6% variation over the temperature range of 30–250 °C, while d33* changes by 8% within the temperature range of 30–180 °C. Microstructural and domain structure analyses suggest that Sm-doping effectively reduces the grain size, leading to a decreased domain size, thereby achieving excellent electromechanical properties. The superior temperature stability is attributed to the suppressive effect of Sm-doping on the R–T ferroelectric phase transition. These studies suggest that Sm-doping represents an effective strategy for achieving the collaborative optimization of piezoelectricity and temperature stability through grain and domain engineering techniques for perovskite ferroelectric materials.}
}