Large electrostrain in Bi1/2Na1/2TiO3-based relaxor ferroelectrics: A case study of Bi1/2Na1/2TiO3-Bi1/2K1/2TiO3-Bi(Ni2/3Nb1/3)O3 ceramics

Guangzhi Dong; Huiqing Fan; Laijun Liu; Pengrong Ren; Zhenxiang Cheng; Shujun Zhang

Journal of Materiomics (May 2021)

Large electrostrain in Bi1/2Na1/2TiO3-based relaxor ferroelectrics: A case study of Bi1/2Na1/2TiO3-Bi1/2K1/2TiO3-Bi(Ni2/3Nb1/3)O3 ceramics

Guangzhi Dong,
Huiqing Fan,
Laijun Liu,
Pengrong Ren,
Zhenxiang Cheng,
Shujun Zhang

Affiliations

Guangzhi Dong: State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China; Institute for Superconducting and Electronic Materials, Australia Institute of Innovative Materials, University of Wollongong, Wollongong, 2522, Australia
Huiqing Fan: State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China; Corresponding author.
Laijun Liu: College of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China
Pengrong Ren: Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi’an University of Technology, Xi’an, 710048, China
Zhenxiang Cheng: Institute for Superconducting and Electronic Materials, Australia Institute of Innovative Materials, University of Wollongong, Wollongong, 2522, Australia
Shujun Zhang: Institute for Superconducting and Electronic Materials, Australia Institute of Innovative Materials, University of Wollongong, Wollongong, 2522, Australia; Corresponding author.

Journal volume & issue: Vol. 7, no. 3
pp. 593 – 602

Abstract

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(1-x)(0.8Bi1/2Na1/2TiO3-0.2Bi1/2K1/2TiO3)-xBi(Ni2/3Nb1/3)O3 (BNKT-xBNN) solid solution ceramics were fabricated by high temperature solid-state reaction method. All the compositions possess relaxor ferroelectric features, among which the ergodic BNKT-0.02BNN exhibits large repeatable electrostrain value Suni = 0.51% at electric field of 65 kV/cm, with high piezoelectric stain coefficient d33∗ of 890 pm/V at 45 kV/cm, while the non-ergodic compositions present unrepeatable large strain response. Based on the electric field-composition phase diagram, the repeatability of strain response in ergodic compositions can be attributed to the reversible electric-field-induced phase transition. In addition, the effects of BNN contents on the macroscopic strain properties are explored by analyzing the existing states of the polar regions with corresponding thermal evolutions and electric-field-induced phase transitions. This research is expected to guide the design of lead free relaxor ferroelectric materials with desired electrostrain properties.

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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