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Polarization Rotation at Morphotropic Phase Boundary in New Lead-Free Na1/2Bi1/2V1–xTixO3 Piezoceramics
- Source :
- Acs Applied Materials & Interfaces. 13(4):5208-5215
- Publication Year :
- 2021
-
Abstract
- In this work, we show that polarization rotation enhances the piezoresponse in a high-performance lead-free piezoelectric material, Na1/2Bi1/2V1-xTixO3, a solid solution between tetragonal Na1/2Bi1/2VO3 and rhombohedral Na1/2Bi1/2TiO3, obtained by high-pressure synthesis. The system forms a pure perovskite structure with a favorable morphotropic phase boundary (MPB) located around x = 0.90, which separates the tetragonal and rhombohedral phases. In addition, a distinct monoclinic phase with polarization rotation as functions of composition and temperature is observed. XRD measurements revealed the moderately high Curie temperature of 523 K at x = 0.95 in the MPB. The piezoelectric coefficient d33 of the monoclinic x = 0.95 sample, 42 pC/N, is higher than those of the tetragonal and rhombohedral phases. Even though the present lead-free Na1/2Bi1/2V1-xTixO3 ceramics feature smaller d33 values compared to many currently available lead-free piezoelectric materials as a result of insufficient poling and low density, we expect our findings open up opportunities for exploring promising lead-free piezoelectric materials in Na1/2Bi1/2VO3-based perovskites.
- Subjects :
- Phase boundary
Materials science
Piezoelectric coefficient
Condensed matter physics
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Ferroelectricity
0104 chemical sciences
Tetragonal crystal system
Phase (matter)
Curie temperature
General Materials Science
0210 nano-technology
Perovskite (structure)
Monoclinic crystal system
Subjects
Details
- Language :
- English
- Volume :
- 13
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Acs Applied Materials & Interfaces
- Accession number :
- edsair.doi.dedup.....aab93d09c070b77601ecd7f425d582ed