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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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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
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article
Hardening behavior and highly enhanced mechanical quality factor in (K0.5Na0.5)NbO3–based ceramics
Abstract
<p>This paper relates the microstructure, crystallographic structure, ferroelectric, and piezoelectric properties of (K<sub>0.5</sub>Na<sub>0.5</sub>)NbO<sub>3</sub> (KNN) ceramics modified with 0.38 mol% K<sub>5.4</sub>Cu<sub>1.3</sub>Ta<sub>10</sub>O<sub>29</sub> (KCT) and different amounts of CuO. Results revealed that the addition of KCT and CuO were effective in enhancing the sinterability of KNN. The internal bias field (E<sub>ib</sub>) increased from 0.3 kV/mm to 0.58 kV/mm at 0.5 mol% CuO–added KNN+KCT ceramics. The increase of E<sub>ib</sub> corresponds very well with the observed increase of the mechanical quality factor (Q<sub>m</sub>) from 112 to 2665 for 0.5 mol% CuO. Besides, addition of 0.5 mol% CuO to KNN+KCT resulted in a large increase of the EPR signal, which is related to the increased amount Cu<sup>2+</sup> and a corresponding increase of the concentration of defect dipoles. This result is in good agreement with the increased E<sub>ib</sub> and the resulting hardening behavior.</p>