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Temperature-insensitive electric-field-induced strain and enhanced piezoelectric properties of <001> textured (K,Na)NbO3-based leadfree piezoceramics

Zhang, Haibo ; Zhu, Yiwei ; Fan, Pengyuan ; Marwat, Moshsin Ali ; Ma, Weigang ; Liu, Kai ; Liu, Hongming ; Xie, Bing ; Wang, Ke ; Koruza, Jurij (2018):
Temperature-insensitive electric-field-induced strain and enhanced piezoelectric properties of <001> textured (K,Na)NbO3-based leadfree piezoceramics.
In: Acta Materialia, 156, pp. 389-398. Elsevier, ISSN 13596454,
DOI: 10.1016/j.actamat.2018.07.005,
[Article]

Abstract

Texturing is an effective method to improve the piezoelectric properties of lead-free piezoceramics. In the present study, textured (K,Na)NbO3-based piezoceramics with a Lotgering factor of 89.7% were successfully fabricated by the templated grain growth (TGG) method. Compared with its non-textured counterparts, great enhancements of the piezoelectric coefficient (50% improvement) and electromechanical coupling factor are observed in the textured samples. More importantly, electric-field-induced strain is also remarkably improved, as evident by a 17% higher large-signal piezoelectric coefficient (346 pm/V) of the textured sample. A relatively low strain deviation of 2% is observed between room temperature and 150 °C, and even up to 175 °C, 86% of their room temperature large-signal piezoelectric coefficient value is maintained. This temperature stability of textured (K,Na)NbO3-based piezoceramics is of great significance for actuators with a stable response over a broad temperature range.

Item Type: Article
Erschienen: 2018
Creators: Zhang, Haibo ; Zhu, Yiwei ; Fan, Pengyuan ; Marwat, Moshsin Ali ; Ma, Weigang ; Liu, Kai ; Liu, Hongming ; Xie, Bing ; Wang, Ke ; Koruza, Jurij
Title: Temperature-insensitive electric-field-induced strain and enhanced piezoelectric properties of <001> textured (K,Na)NbO3-based leadfree piezoceramics
Language: English
Abstract:

Texturing is an effective method to improve the piezoelectric properties of lead-free piezoceramics. In the present study, textured (K,Na)NbO3-based piezoceramics with a Lotgering factor of 89.7% were successfully fabricated by the templated grain growth (TGG) method. Compared with its non-textured counterparts, great enhancements of the piezoelectric coefficient (50% improvement) and electromechanical coupling factor are observed in the textured samples. More importantly, electric-field-induced strain is also remarkably improved, as evident by a 17% higher large-signal piezoelectric coefficient (346 pm/V) of the textured sample. A relatively low strain deviation of 2% is observed between room temperature and 150 °C, and even up to 175 °C, 86% of their room temperature large-signal piezoelectric coefficient value is maintained. This temperature stability of textured (K,Na)NbO3-based piezoceramics is of great significance for actuators with a stable response over a broad temperature range.

Journal or Publication Title: Acta Materialia
Journal volume: 156
Publisher: Elsevier
Uncontrolled Keywords: Texture Lead-free piezoceramics Piezoelectric properties Temperature stability
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: 11 Jul 2018 11:53
DOI: 10.1016/j.actamat.2018.07.005
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