Modulation of phase boundary and domain structures to engineer strain properties in BNT-based ferroelectrics
| Title: | Modulation of phase boundary and domain structures to engineer strain properties in BNT-based ferroelectrics |
|---|---|
| Authors: | Yule Yang, Zhiyong Liu, Pengrong Ren, Yuqing Mao, Haijun Sun, Bingliang Liang, Pu Mao, Kun Guo, Bing Xie, Longlong Shu |
| Source: | Journal of Advanced Ceramics, Vol 13, Iss 7, Pp 967-975 (2024) |
| Publisher Information: | Tsinghua University Press, 2024. |
| Publication Year: | 2024 |
| Collection: | LCC:Clay industries. Ceramics. Glass |
| Subject Terms: | bismuth sodium titanate (bnt), domain structure, phase boundary, strain response, relaxor state, Clay industries. Ceramics. Glass, TP785-869 |
| More Details: | Bismuth sodium titanate (BNT) ceramics exhibit outstanding strain responses but are unfavorable for application in high-sensitivity displacement actuators due to the large negative strain resulting from irreversible changes in their phase transition and domain structure. Here, (1−x)Bi0.50Na0.41K0.09TiO3–xNaNbO3 (BNKT−xNN) solid solutions were prepared to improve the strain properties through the strategy of modulating the phase boundary and domain structures. The introduction of sodium niobate could effectively regulate the relative content of the tetragonal (P4bm) and rhombohedral (R3c) phases in the phase boundary region. The ferroelectric-to-relaxor phase transition (TF−R) was reduced, and the ergodic relaxor (ER) state was nurtured at room temperature. Excellent zero-negative strain properties of S = 0.41% and d33* = 742 pm/V were achieved from the reversible transition between the ER and ferroelectric states under an applied electric field (x = 0.04). Additionally, understanding the domain states via piezoelectric force microscopy (PFM) and first-order reversal curve (FORC) revealed that the superior strain responses originated from the reversible inter-transformation of substable macrodomains and polar nanoregions (PNRs) in the phase boundary. This study provides new insight into the interplay between the evolution of phase boundaries and domain structures and the strain properties of BNT-based ceramics. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2226-4108 2227-8508 |
| Relation: | https://www.sciopen.com/article/10.26599/JAC.2024.9220910; https://doaj.org/toc/2226-4108; https://doaj.org/toc/2227-8508 |
| DOI: | 10.26599/JAC.2024.9220910 |
| Access URL: | https://doaj.org/article/f5b847ecfa58471ab4a371d700f195ba |
| Accession Number: | edsdoj.f5b847ecfa58471ab4a371d700f195ba |
| Database: | Directory of Open Access Journals |
| ISSN: | 22264108 22278508 |
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| DOI: | 10.26599/JAC.2024.9220910 |
| Published in: | Journal of Advanced Ceramics |
| Language: | English |