| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Rödel, Jürgen
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2024Harvesting room-temperature plasticity in ceramics by mechanically seeded dislocationscitations
- 2024Dislocation Density‐Mediated Functionality in Single‐Crystal BaTiO₃
- 2022Anisotropic dislocation-domain wall interactions in ferroelectricscitations
- 2022High-temperature plastic deformation of ⟨110⟩-oriented BaTiO 3 single crystalscitations
- 2022VERFAHREN ZUR AUSSCHEIDUNGSHÄRTUNG EINER PIEZOKERAMIK UND PIEZOKERAMIK
- 2022Enhanced photoconductivity at dislocations in SrTiO 3citations
- 2021Piezotronic effect at Schottky barrier of a metal-ZnO single crystal interface
- 2021Precipitation Hardening in Ferroelectric Ceramicscitations
- 2021Dislocation-toughened ceramicscitations
- 2021Polarization Rotation at Morphotropic Phase Boundary in New Lead-Free Na1/2Bi1/2V1-xTi xO3 Piezoceramicscitations
- 2021Thermal stability of the electromechanical properties in acceptor-doped and composite-hardened (Na1/2Bi1/2)TiO3-BaTiO3ferroelectricscitations
- 2020High temperature creep-mediated functionality in polycrystalline barium titanatecitations
- 2019Mechanical versus electromechanical hardening in relaxor ferroelectric Na1/2Bi1/2TiO3-BaTiO3 with ZnO inclusionscitations
- 2018Interplay of conventional with inverse electrocaloric response in (Pb,Nb)(Zr,Sn,Ti) O3 antiferroelectric materialscitations
- 2017Hardening behavior and highly enhanced mechanical quality factor in (K0.5Na0.5)NbO3–based ceramicscitations
- 2017Stress-induced phase transition in lead-free relaxor ferroelectric compositescitations
- 2016Orientation-dependent electromechanical properties of Mn-doped (Li,Na,K)(Nb,Ta)O3 single crystalscitations
- 2014Simultaneous Enhancement of Fracture Toughness and Unipolar Strain in Pb(Zr,Ti)O-3-ZrO2 Composites Through Composition Adjustmentcitations
- 2014Aging in the relaxor and ferroelectric state of Fe-doped (1-x)(Bi 1/2 Na 1/2 )TiO 3 -xBaTiO 3 piezoelectric ceramicscitations
- 2008Bipolar Fatigue Caused by Field Screening in Pb(Zr,Ti)O3 Ceramics
Places of action
| Organizations | Location | People |
|---|
article
Precipitation Hardening in Ferroelectric Ceramics
Abstract
<p>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.</p>