Mechanisms of Enhanced Thermal Stability of Polarization in Lead-Free (Bi1/2Na1/2)0.94Ba0.06TiO3/ZnO Ceramic Composites
Abstract
(Bi1/2Na1/2)TiO3-based solid solutions, one of the major systems of lead-free piezoelectric ceramics, exhibit a low thermal depolarization temperature (Td~100°C). It was reported that by incorporating 30 mol% ZnO particles to form a ceramic composite of (Bi1/2Na1/2)0.94Ba0.06TiO3/ZnO, the depolarization process can be shifted up to ~250 °C. In the present work, a variety of advanced transmission electron microscopy techniques, including in situ heating, annular bright-field, high-angle annular dark-field, geometric phase analysis, energy-dispersive spectrum and electron energy-loss spectroscopy, are employed to investigate the underlying mechanisms for the enhanced thermal stability of polarization in the composite. Furthermore, it is found that the abrupt depolarization in (Bi1/2Na1/2)0.94Ba0.06TiO3 at Td becomes diffused over a wide temperature window up to the temperature at maximum dielectric constant (Tm) under the combined actions of the incorporation of Zn into the perovskite lattice, the presence of residual stresses, and the pinning effect on micron-sized domains provided by ZnO particles.
- Authors:
-
- Iowa State Univ., Ames, IA (United States)
- Ames Lab., Ames, IA (United States)
- Nanjing Univ., Nanjing (China)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1494936
- Alternate Identifier(s):
- OSTI ID: 1493644
- Report Number(s):
- IS-J-9879
Journal ID: ISSN 2475-9953; PRMHAR
- Grant/Contract Number:
- DMR-1465254; AC02-07CH11358; 11674156
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Materials
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 2; Journal ID: ISSN 2475-9953
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Fan, Zhongming, Zhou, Lin, Kim, Tae -Hoon, Zhang, Ji, Zhang, Shan -Tao, and Tan, Xiaoli. Mechanisms of Enhanced Thermal Stability of Polarization in Lead-Free (Bi1/2Na1/2)0.94Ba0.06TiO3/ZnO Ceramic Composites. United States: N. p., 2019.
Web. doi:10.1103/PhysRevMaterials.3.024402.
Fan, Zhongming, Zhou, Lin, Kim, Tae -Hoon, Zhang, Ji, Zhang, Shan -Tao, & Tan, Xiaoli. Mechanisms of Enhanced Thermal Stability of Polarization in Lead-Free (Bi1/2Na1/2)0.94Ba0.06TiO3/ZnO Ceramic Composites. United States. https://doi.org/10.1103/PhysRevMaterials.3.024402
Fan, Zhongming, Zhou, Lin, Kim, Tae -Hoon, Zhang, Ji, Zhang, Shan -Tao, and Tan, Xiaoli. Wed .
"Mechanisms of Enhanced Thermal Stability of Polarization in Lead-Free (Bi1/2Na1/2)0.94Ba0.06TiO3/ZnO Ceramic Composites". United States. https://doi.org/10.1103/PhysRevMaterials.3.024402. https://www.osti.gov/servlets/purl/1494936.
@article{osti_1494936,
title = {Mechanisms of Enhanced Thermal Stability of Polarization in Lead-Free (Bi1/2Na1/2)0.94Ba0.06TiO3/ZnO Ceramic Composites},
author = {Fan, Zhongming and Zhou, Lin and Kim, Tae -Hoon and Zhang, Ji and Zhang, Shan -Tao and Tan, Xiaoli},
abstractNote = {(Bi1/2Na1/2)TiO3-based solid solutions, one of the major systems of lead-free piezoelectric ceramics, exhibit a low thermal depolarization temperature (Td~100°C). It was reported that by incorporating 30 mol% ZnO particles to form a ceramic composite of (Bi1/2Na1/2)0.94Ba0.06TiO3/ZnO, the depolarization process can be shifted up to ~250 °C. In the present work, a variety of advanced transmission electron microscopy techniques, including in situ heating, annular bright-field, high-angle annular dark-field, geometric phase analysis, energy-dispersive spectrum and electron energy-loss spectroscopy, are employed to investigate the underlying mechanisms for the enhanced thermal stability of polarization in the composite. Furthermore, it is found that the abrupt depolarization in (Bi1/2Na1/2)0.94Ba0.06TiO3 at Td becomes diffused over a wide temperature window up to the temperature at maximum dielectric constant (Tm) under the combined actions of the incorporation of Zn into the perovskite lattice, the presence of residual stresses, and the pinning effect on micron-sized domains provided by ZnO particles.},
doi = {10.1103/PhysRevMaterials.3.024402},
journal = {Physical Review Materials},
number = 2,
volume = 3,
place = {United States},
year = {Wed Feb 06 00:00:00 EST 2019},
month = {Wed Feb 06 00:00:00 EST 2019}
}
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Works referencing / citing this record:
Dual-stimuli in-situ TEM study on the nonergodic/ergodic crossover in the 0.75(Bi 1/2 Na 1/2 )TiO 3 –0.25SrTiO 3 relaxor
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