Giant electric field–induced strain in lead-free piezoceramics

Autor:	Geng Huangfu, Kun Zeng, Binquan Wang, Jie Wang, Zhengqian Fu, Fangfang Xu, Shujun Zhang, Haosu Luo, Dwight Viehland, Yiping Guo
Rok vydání:	2022
Předmět:	Multidisciplinary
Zdroj:	Science. 378:1125-1130
ISSN:	1095-9203 0036-8075
Popis:	Piezoelectric actuators are indispensable over a wide range of industries for their fast response and precise displacement. Most commercial piezoelectric actuators contain lead, posing environmental challenges. We show that a giant strain (1.05%) and a large-signal piezoelectric strain coefficient (2100 picometer/volt) are achieved in strontium (Sr)–doped (K,Na)NbO 3 lead-free piezoceramics, being synthesized by the conventional solid-state reaction method without any post treatment. The underlying mechanism responsible for the ultrahigh electrostrain is the interaction between defect dipoles and domain switching. The fatigue resistance, thermal stability, and strain value (0.25%) at 20 kilovolt/centimeter are comparable with or better than those of commercial Pb(Zr,Ti)O 3 -based ceramics, showing great potential for practical applications. This material may provide a lead-free alternative with a simple composition for piezoelectric actuators and a paradigm for the design of high-performance piezoelectrics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28f1ebf698f436f4617aa6edd17834aa https://doi.org/10.1126/science.ade2964 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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