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Precipitation Hardening in Ferroelectric Ceramics

Zhao, Changhao ; Gao, Shuang ; Yang, Tiannan ; Scherer, Michael ; Schultheiß, Jan ; Meier, Dennis ; Tan, Xiaoli ; Kleebe, Hans‐Joachim ; Chen, Long‐Qing ; Koruza, Jurij ; Rödel, Jürgen (2023)
Precipitation Hardening in Ferroelectric Ceramics.
In: Advanced Materials, 2021, 33 (36)
doi: 10.26083/tuprints-00020996
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Precipitation Hardening in Ferroelectric Ceramics
Language: English
Date: 11 December 2023
Place of Publication: Darmstadt
Year of primary publication: 2021
Place of primary publication: Weinheim
Publisher: Wiley-VCH
Journal or Publication Title: Advanced Materials
Volume of the journal: 33
Issue Number: 36
Collation: 10 Seiten
DOI: 10.26083/tuprints-00020996
Corresponding Links:
Origin: Secondary publication DeepGreen

Domain wall motion in ferroics, similar to dislocation motion in metals, can be tuned by well‐concepted microstructural elements. In demanding high‐power applications of piezoelectric materials, the domain wall motion is considered as a lossy hysteretic mechanism that should be restricted. Current applications for so‐called hard piezoelectrics are abundant and hinge on the use of an acceptor‐doping scheme. However, this mechanism features severe limitations due to enhanced mobility of oxygen vacancies at moderate temperatures. By analogy with metal technology, the authors present here a new solution for electroceramics, where precipitates are utilized to pin domain walls and improve piezoelectric properties. Through a sequence of sintering, nucleation, and precipitate growth, intragranular precipitates leading to a fine domain structure are developed as shown by transmission electron microscopy, piezoresponse force microscopy, and phase‐field simulation. This structure impedes the domain wall motion as elucidated by electromechanical characterization. As a result, the mechanical quality factor is increased by ≈50% and the hysteresis in electrostrain is suppressed considerably. This is even achieved with slightly increased piezoelectric coefficient and electromechanical coupling factor. This novel process can be smoothly implemented in industrial production processes and is accessible to simple laboratory experimentation for microstructure optimization and implementation in various ferroelectric systems.

Uncontrolled Keywords: dielectrics, electromechanical hardening, ferroelectrics, mechanical quality factor, precipitation
Identification Number: 2102421
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-209966
Classification DDC: 500 Science and mathematics > 540 Chemistry
600 Technology, medicine, applied sciences > 660 Chemical engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 11 Dec 2023 13:58
Last Modified: 23 Feb 2024 07:22
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20996
PPN: 515641030
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