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Title: 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:
 [1];  [2];  [2];  [3];  [3];  [1]
  1. Iowa State Univ., Ames, IA (United States)
  2. Ames Lab., Ames, IA (United States)
  3. 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. doi: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. doi: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 = {2019},
month = {2}
}

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    Works referencing / citing this record:

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