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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 and Zhu, Yiwei and Fan, Pengyuan and Marwat, Moshsin Ali and Ma, Weigang and Liu, Kai and Liu, Hongming and Xie, Bing and Wang, Ke and 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, Elsevier, pp. 389-398, 156, 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 and Zhu, Yiwei and Fan, Pengyuan and Marwat, Moshsin Ali and Ma, Weigang and Liu, Kai and Liu, Hongming and Xie, Bing and Wang, Ke and 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
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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