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Texture-based ferroelectric hardening in Na1/2Bi1/2TiO3-based piezoceramics

Bremecker, Daniel ; Wohninsland, Andreas ; Teuber, Siegfried ; Kodumudi Venkataraman, Lalitha ; Hinterstein, Manuel ; Rödel, Jürgen (2023)
Texture-based ferroelectric hardening in Na1/2Bi1/2TiO3-based piezoceramics.
In: Physical Review Materials, 7 (6)
doi: 10.1103/PhysRevMaterials.7.064407
Article, Bibliographie

Abstract

Na 1/2 Bi 1/2 TiO3 -based (NBT-based) ceramics offer a viable option to replace lead-based materials for high-power applications as they are characterized by a stable mechanical quality factor with increasing vibration velocity in comparison to lead-based piezoceramics. Recently, the minor and stable extrinsic contributions were revealed as the origin for the stability of the mechanical quality factor with increasing vibration velocity. This work identifies the very unusual high poling degree as cause for the small extrinsic contributions. To this end, complete pole figure densities have been quantified and correlated to the piezoelectric coefficient and electrome-chanical quality factor. This hypothesis is further strengthened by correlating the piezoelectric constant (sum of intrinsic and extrinsic contributions) with the remanent polarization (correlates to remanent texturing degree). In order to assess a full picture of NBT-based piezoceramics, 0.94Na 1/2 Bi 1/2 TiO3 -0.06BaTiO3 has been considered with and without Zn doping and with quenching. It is compared to 0.79Na 1/2 Bi 1/2 TiO3 -0.21 K1/2 Bi 1/2 TiO3 with and without Mg doping. Finally, a contrast to soft Pb(Zr 1/2 Ti 1/2 )O3 (PZT) flushes out the impact of domain wall motion on the piezoelectric coefficient and the electromechanical quality factor. Whereas a PZT-based reference material exhibits a linear increase in the piezoelectric constant with increasing remanent polarization, the NBT-based materials deviate from the linear trend, indicating a decrease in extrinsic contributions.

Item Type: Article
Erschienen: 2023
Creators: Bremecker, Daniel ; Wohninsland, Andreas ; Teuber, Siegfried ; Kodumudi Venkataraman, Lalitha ; Hinterstein, Manuel ; Rödel, Jürgen
Type of entry: Bibliographie
Title: Texture-based ferroelectric hardening in Na1/2Bi1/2TiO3-based piezoceramics
Language: English
Date: 19 June 2023
Publisher: American Physical Society
Journal or Publication Title: Physical Review Materials
Volume of the journal: 7
Issue Number: 6
DOI: 10.1103/PhysRevMaterials.7.064407
Abstract:

Na 1/2 Bi 1/2 TiO3 -based (NBT-based) ceramics offer a viable option to replace lead-based materials for high-power applications as they are characterized by a stable mechanical quality factor with increasing vibration velocity in comparison to lead-based piezoceramics. Recently, the minor and stable extrinsic contributions were revealed as the origin for the stability of the mechanical quality factor with increasing vibration velocity. This work identifies the very unusual high poling degree as cause for the small extrinsic contributions. To this end, complete pole figure densities have been quantified and correlated to the piezoelectric coefficient and electrome-chanical quality factor. This hypothesis is further strengthened by correlating the piezoelectric constant (sum of intrinsic and extrinsic contributions) with the remanent polarization (correlates to remanent texturing degree). In order to assess a full picture of NBT-based piezoceramics, 0.94Na 1/2 Bi 1/2 TiO3 -0.06BaTiO3 has been considered with and without Zn doping and with quenching. It is compared to 0.79Na 1/2 Bi 1/2 TiO3 -0.21 K1/2 Bi 1/2 TiO3 with and without Mg doping. Finally, a contrast to soft Pb(Zr 1/2 Ti 1/2 )O3 (PZT) flushes out the impact of domain wall motion on the piezoelectric coefficient and the electromechanical quality factor. Whereas a PZT-based reference material exhibits a linear increase in the piezoelectric constant with increasing remanent polarization, the NBT-based materials deviate from the linear trend, indicating a decrease in extrinsic contributions.

Additional Information:

Artikel-ID: 064407

Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 20 Jun 2023 05:13
Last Modified: 20 Jun 2023 05:22
PPN: 508914663
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