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Mechanism of electrostrain enhancement in the single rhombohedral phase region of Ba(Ti1 – Zr )O3 ceramics
- Source :
- Journal of Alloys and Compounds. 788:748-755
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- A large electrostrain usually occurs at ferroelectric-ferroelectric phase boundaries. However, in the Ba(Ti1 – xZrx)O3 (BT-xZr) system prepared by the conventional solid-state reaction method, we discovered a local electrostrain maximum in the single rhombohedral phase region at the quasi-quadruple point with a composition of BT-0.12Zr that had a relatively weak temperature sensitivity below 50 °C. Mechanisms of the local electrostrain maximum in the single-phase region of the BT-xZr system were studied. The large coercive field and large domain size of BT-0.12Zr indicate that domain switching was not facilitated. Nevertheless, the large lattice distortion of BT-0.12Zr suggests a large intrinsic lattice strain, which predominantly contributed to the observed macroscopic electrostrain enhancement at the quasi-quadruple point composition in the single-phase region. Compared to nearby sample compositions, the largest lattice distortion of BT-0.12Zr was found to be correlated with the highest electrostrictive coefficient at the tricritical quasi-quadruple point, as deduced from phenomenological Landau analysis. Our work may shed light on the development of weakly temperature-dependent large electrostrain materials by identifying the tricritical quasi-quadruple point in ferroelectric phase diagrams.
- Subjects :
- Work (thermodynamics)
Materials science
Electrostriction
Condensed matter physics
Mechanical Engineering
Metals and Alloys
02 engineering and technology
Trigonal crystal system
Coercivity
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Ferroelectricity
0104 chemical sciences
Mechanics of Materials
Phase (matter)
visual_art
Materials Chemistry
visual_art.visual_art_medium
Ceramic
0210 nano-technology
Phase diagram
Subjects
Details
- ISSN :
- 09258388
- Volume :
- 788
- Database :
- OpenAIRE
- Journal :
- Journal of Alloys and Compounds
- Accession number :
- edsair.doi...........556c5effd3d74aae6abb07f6be04591b