TU Darmstadt / ULB / TUbiblio

Enhanced electric-field-induced strains in (K,Na)NbO3 piezoelectrics from heterogeneous structures

Zhang, Mao-Hua ; Zhang, Qinghua ; Yu, Tingting ; Li, Geng ; Thong, Hao-Cheng ; Peng, Li-Yeng ; Liu, Lisha ; Ma, Jing ; Shen, Yang ; Shen, Zhijian ; Daniels, John E. ; Gu, Lin ; Han, Bing ; Chen, Long-Qing ; Li, Jing-Feng ; Li, Fei ; Wang, Ke (2021):
Enhanced electric-field-induced strains in (K,Na)NbO3 piezoelectrics from heterogeneous structures.
In: Materials Today, 46, pp. 44-53. Elsevier, ISSN 1369-7021,
DOI: 10.1016/j.mattod.2021.02.002,
[Article]

Abstract

Piezoelectrics exhibit mechanical strain in response to electrical stimuli and vice versa. A high level of electric-field-induced strain with minimal hysteresis is desired for piezoelectric materials when used as actuators. The past two decades have seen extensive research into lead-free piezoelectrics to replace Pb(Zr,Ti)O3 and compositional engineering has been demonstrated to be an effective method to tailor their functional properties. Doped (K,Na)NbO3 (KNN) compositions with elaborate compositional tuning can exhibit enhanced electromechanical properties. However, a balance between enhanced properties and non-toxicity of the dopants should be considered. In this work, we propose to use microstructural engineering to enhance the properties. Based on phase-field simulations, we propose to take advantage of depolarization energies generated by polar-nonpolar interfaces, to increase the contribution of domain wall motion to electric-field-induced strain. Heterogeneous ferroelectric-paraelectric microstructures were introduced into a KNN ceramic via a two-step sintering process. Their presence was characterized by high-resolution transmission electron microscopy. Enhanced reversible domain wall motion was verified by in situ high-energy X-ray diffraction. Electric-field-induced strain is enhanced by 62% and 200% at 25 °C and 150 °C, respectively. Considering lead-free piezoelectrics also represent an emerging class of biomaterials for medical technology, the non-toxicity and biocompatibility of the investigated compositions are examined by in vitro cell viability assays. Our results demonstrate that microstructural engineering is a promising alternative approach to enhance the electric-field-induced strain of lead-free piezoelectrics while maintaining biocompatibility

Item Type: Article
Erschienen: 2021
Creators: Zhang, Mao-Hua ; Zhang, Qinghua ; Yu, Tingting ; Li, Geng ; Thong, Hao-Cheng ; Peng, Li-Yeng ; Liu, Lisha ; Ma, Jing ; Shen, Yang ; Shen, Zhijian ; Daniels, John E. ; Gu, Lin ; Han, Bing ; Chen, Long-Qing ; Li, Jing-Feng ; Li, Fei ; Wang, Ke
Title: Enhanced electric-field-induced strains in (K,Na)NbO3 piezoelectrics from heterogeneous structures
Language: English
Abstract:

Piezoelectrics exhibit mechanical strain in response to electrical stimuli and vice versa. A high level of electric-field-induced strain with minimal hysteresis is desired for piezoelectric materials when used as actuators. The past two decades have seen extensive research into lead-free piezoelectrics to replace Pb(Zr,Ti)O3 and compositional engineering has been demonstrated to be an effective method to tailor their functional properties. Doped (K,Na)NbO3 (KNN) compositions with elaborate compositional tuning can exhibit enhanced electromechanical properties. However, a balance between enhanced properties and non-toxicity of the dopants should be considered. In this work, we propose to use microstructural engineering to enhance the properties. Based on phase-field simulations, we propose to take advantage of depolarization energies generated by polar-nonpolar interfaces, to increase the contribution of domain wall motion to electric-field-induced strain. Heterogeneous ferroelectric-paraelectric microstructures were introduced into a KNN ceramic via a two-step sintering process. Their presence was characterized by high-resolution transmission electron microscopy. Enhanced reversible domain wall motion was verified by in situ high-energy X-ray diffraction. Electric-field-induced strain is enhanced by 62% and 200% at 25 °C and 150 °C, respectively. Considering lead-free piezoelectrics also represent an emerging class of biomaterials for medical technology, the non-toxicity and biocompatibility of the investigated compositions are examined by in vitro cell viability assays. Our results demonstrate that microstructural engineering is a promising alternative approach to enhance the electric-field-induced strain of lead-free piezoelectrics while maintaining biocompatibility

Journal or Publication Title: Materials Today
Journal volume: 46
Publisher: Elsevier
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 14 Jul 2021 06:01
DOI: 10.1016/j.mattod.2021.02.002
Official URL: https://www.sciencedirect.com/science/article/abs/pii/S13697...
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details