Issue 25, 2022

Enhanced strains by flexible nanoscale domain structure in BNKT-SBT relaxor ferroelectrics

Abstract

Achieving a high strain under a low electric field is critical for actuator applications, and so is something which has always been pursued. Here, an enhanced strain was achieved by introducing Sr0.7Bi0.2TiO3 (SBT) into Bi1/2(Na0.84K0.16)1/2TiO3 (BNKT) under the guidance of phase boundary engineering and domain design. The introduction of the SBT induces a phase transition from the dominant rhombohedral to the dominant tetragonal and strong relaxor behaviour, as well as increased ergodicity. The enhanced and anti-fatigue strain of 0.57% was obtained in BNKT-8SBT ceramics under a relatively low electric field of 50 kV cm−1, accompanied by a large Image ID:d2tc01551j-t1.gif of 1140 pm V−1. An atomic-resolution displacement vector map reveals the coexistence of R and T nanodomains induced by local structural inhomogeneity. The coexistent nanodomains contribute to a flexible domain structure. This unique domain structure is suggested to be the origin of the relaxor features and the enhanced strains. This result is helpful to understand the excellent performance from a structural point of view and could promote further development of high-performance materials.

Graphical abstract: Enhanced strains by flexible nanoscale domain structure in BNKT-SBT relaxor ferroelectrics

Supplementary files

Article information

Article type
Paper
Submitted
15 Apr 2022
Accepted
08 Jun 2022
First published
10 Jun 2022

J. Mater. Chem. C, 2022,10, 9628-9635

Enhanced strains by flexible nanoscale domain structure in BNKT-SBT relaxor ferroelectrics

X. Sun, H. Qian, T. Zheng, F. Chen, Y. Liu and Y. Lyu, J. Mater. Chem. C, 2022, 10, 9628 DOI: 10.1039/D2TC01551J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements