Enhanced Strain Properties in KNN-Based Lead-free Piezoelectric Multilayer Actuators by Low-Temperature Texture Engineering

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-(Na<sub>0.5</sub>K<sub>0.5</sub>)-(Nb<sub>0.965</sub>Sb<sub>0.035</sub>)-O<sub>3</sub>-0.01CaZrO<sub>3</sub>-0.03-(K<sub>0.5</sub>Bi<sub>0.5</sub>HfO<sub>3</sub>) (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%, <i>d</i> <sub>33</sub>* 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.

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Publication Details

Journal
ACS Omega
Published
2025-08-22
DOI
https://doi.org/10.1021/acsomega.5c05074
Primary Topic
Ferroelectric and Piezoelectric Materials
Type
article
Field-Weighted Citation Impact
0.00

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article

Enhanced Strain Properties in KNN-Based Lead-free Piezoelectric Multilayer Actuators by Low-Temperature Texture Engineering

Qiang He, Jingkai Nie, Shicheng Zhang, Tian Chen et al.
ACS Omega
Ferroelectric and Piezoelectric Materials
article

Enhanced Strain Properties in KNN-Based Lead-free Piezoelectric Multilayer Actuators by Low-Temperature Texture Engineering

Qiang He, Jingkai Nie, Shicheng Zhang, Tian Chen, Yu Han, Ning Qiu, Xiaogang Chen, Yi Tian
article en

Abstract

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-(Na<sub>0.5</sub>K<sub>0.5</sub>)-(Nb<sub>0.965</sub>Sb<sub>0.035</sub>)-O<sub>3</sub>-0.01CaZrO<sub>3</sub>-0.03-(K<sub>0.5</sub>Bi<sub>0.5</sub>HfO<sub>3</sub>) (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%, <i>d</i> <sub>33</sub>* 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.

ACS OmegaVol. 10(34)
North China Electric Power University (CN), State Grid Corporation of China (China) (CN), Shanghai Electric (China) (CN), China Electric Power Research Institute
State Grid Corporation of China
Affordable and clean energy
Openalex Percentile: Top 84%
Ferroelectric and Piezoelectric Materials
DOIOpen Access PDFOpenAlex
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