TY - JOUR
T1 - Coherent Precipitates with Strong Domain Wall Pinning in Alkaline Niobate Ferroelectrics
AU - Zhao, Changhao
AU - Gao, Shuang
AU - Kleebe, Hans Joachim
AU - Tan, Xiaoli
AU - Koruza, Jurij
AU - Rödel, Jürgen
N1 - Funding Information:
The authors are indebted to the Deutsche Forschungsgemeinschaft (DFG) for funding under project number 462460745. X.T. acknowledges financial support form the U.S. National Science Foundation (NSF) through Grant No. DMR‐2110264. The authors acknowledge DESY (Hamburg, Germany), a member of the Helmholtz Association HGF, for the provision of experimental facilities. Parts of this research were carried out at PETRA III and the authors would like to thank Alexander Schökel for assistance in using the beamline P02.1. Beamtime was allocated for proposal I‐20210563.
Funding Information:
The authors are indebted to the Deutsche Forschungsgemeinschaft (DFG) for funding under project number 462460745. X.T. acknowledges financial support form the U.S. National Science Foundation (NSF) through Grant No. DMR-2110264. The authors acknowledge DESY (Hamburg, Germany), a member of the Helmholtz Association HGF, for the provision of experimental facilities. Parts of this research were carried out at PETRA III and the authors would like to thank Alexander Schökel for assistance in using the beamline P02.1. Beamtime was allocated for proposal I-20210563. Open access funding enabled and organized by Projekt DEAL.
Publisher Copyright:
© 2022 The Authors. Advanced Materials published by Wiley-VCH GmbH.
PY - 2022/9/22
Y1 - 2022/9/22
N2 - High-power piezoelectric applications are predicted to share approximately one-third of the lead-free piezoelectric ceramic market in 2024 with alkaline niobates as the primary competitor. To suppress self-heating in high-power devices due to mechanical loss when driven by large electric fields, piezoelectric hardening to restrict domain wall motion is required. In the present work, highly effective piezoelectric hardening via coherent plate-like precipitates in a model system of the (Li,Na)NbO3 (LNN) solid solution delivers a reduction in losses, quantified as an electromechanical quality factor, by a factor of ten. Various thermal aging schemes are demonstrated to control the average size, number density, and location of the precipitates. The established properties are correlated with a detailed determination of short- and long-range atomic structure by X-ray diffraction and pair distribution function analysis, respectively, as well as microstructure determined by transmission electron microscopy. The impact of microstructure with precipitates on both small- and large-field properties is also established. These results pave the way to implement precipitate hardening in piezoelectric materials, analogous to precipitate hardening in metals, broadening their use cases in applications.
AB - High-power piezoelectric applications are predicted to share approximately one-third of the lead-free piezoelectric ceramic market in 2024 with alkaline niobates as the primary competitor. To suppress self-heating in high-power devices due to mechanical loss when driven by large electric fields, piezoelectric hardening to restrict domain wall motion is required. In the present work, highly effective piezoelectric hardening via coherent plate-like precipitates in a model system of the (Li,Na)NbO3 (LNN) solid solution delivers a reduction in losses, quantified as an electromechanical quality factor, by a factor of ten. Various thermal aging schemes are demonstrated to control the average size, number density, and location of the precipitates. The established properties are correlated with a detailed determination of short- and long-range atomic structure by X-ray diffraction and pair distribution function analysis, respectively, as well as microstructure determined by transmission electron microscopy. The impact of microstructure with precipitates on both small- and large-field properties is also established. These results pave the way to implement precipitate hardening in piezoelectric materials, analogous to precipitate hardening in metals, broadening their use cases in applications.
KW - electromechanical hardening
KW - high-power properties
KW - mechanical quality factor
KW - niobates
KW - precipitation
UR - http://www.scopus.com/inward/record.url?scp=85136473191&partnerID=8YFLogxK
U2 - 10.1002/adma.202202379
DO - 10.1002/adma.202202379
M3 - Article
C2 - 35999187
AN - SCOPUS:85136473191
SN - 0935-9648
VL - 34
JO - Advanced Materials
JF - Advanced Materials
IS - 38
M1 - 2202379
ER -