Enhanced electrostrains in PMN–xPZN solid solutions driven by a rather small electric field

Author:

Huang Yunyao1ORCID,Shi Wenjing1,Jing Ruiyi1,Tran Nguyen‐Minh‐An2,Zhang Haibo23ORCID,Shur Vladimir4,Wei Xiaoyong1ORCID,Jin Li1ORCID

Affiliation:

1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, School of Electronic Science and Engineering Xi'an Jiaotong University Xi'an China

2. School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan China

3. Faculty of Chemical Engineering Industrial University of Ho Chi Minh City Ho Chi Minh City Vietnam

4. School of Natural Sciences and Mathematics Ural Federal University Ekaterinburg Russia

Abstract

AbstractPb(Mg1/3Nb2/3)O3 (PMN) relaxors have gained a lot of interest due to their unusual dielectric relaxation and high electrostrictive electrostrain. However, the Tm (temperature associated with maximum permittivity) of PMN is lower than room temperature, which limits their future development of electrostrain and practical applications. In this study, we increased the Tm by incorporating a relaxor ferroelectric (FE) end member Pb(Zn1/3Nb2/3)O3 (PZN) rather than a conventional high Curie temperature FE end member to create (1−x)PMN–xPZN solid solutions with x = 0.2–0.5. Their dielectric, FE, and electrostrain properties were systematically investigated. In x = 0.4 composition, we get a maximum electrostrain of 0.134% and an equivalent piezoelectric coefficient of 936 pm/V under a rather small driving field of 5 kV/cm. Furthermore, the electrostrain of the x = 0.5 is greater than 0.1% between 20 and 80°C, indicating its possible applicability in precision displacement actuators. Our findings not only clarify the electrostrain and electrostrictive properties of (1 − x)PMN–xPZN system but also show an innovative way to improve electrostrain properties by constructing relaxor–relaxor type solid solutions that can be applied to other FE systems.

Funder

National Natural Science Foundation of China

Russian Science Foundation

Publisher

Wiley

Subject

Materials Chemistry,Ceramics and Composites

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