Abstract
Links between residual stress and domain switching in porous barium titanate ceramics were investigated using synchrotron X-ray diffraction as a function of an applied electric field. Barium titanate with highly aligned pores (with pore fraction v p = 0.52) was manufactured by freeze casting and compared with barium titanate produced via conventional pressing and sintering (with v p = 0.06). The domain switching fraction in the freeze cast ceramic was approximately double that of the low porosity barium titanate at a field of 3 kV/mm, attributed to a reduction in the residual stress from 70 MPa to 40 MPa with increased pore fraction. Whilst extrinsic domain switching was enhanced, the intrinsic lattice strain contribution to the piezoelectric properties was slightly reduced in the freeze cast barium titanate compared to the conventionally processed ceramic. These results point towards novel methods for engineering the functional properties of piezoelectric ceramics in the future.
| Original language | English |
|---|---|
| Pages (from-to) | 1434-1444 |
| Number of pages | 11 |
| Journal | Journal of the European Ceramic Society |
| Volume | 42 |
| Issue number | 4 |
| Early online date | 24 Nov 2021 |
| DOIs | |
| Publication status | Published - 1 Apr 2022 |
Bibliographical note
Funding Information:The authors thank Diamond Light Source for access to beamline I15 (proposal number CY24144) and the assistance of Dr Annette Kleppe, Bing Wang and Ziqi Yang is gratefully acknowledged. Yizhe Li thanks S. Wang for her encouragement and support during this time.
Publisher Copyright:
© 2021 Elsevier Ltd
Keywords
- Domain switching
- Ferroelectrics
- In-situ XRD
- Porosity
- Residual stress
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry