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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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Nadaud, Kevin
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (30/30 displayed)
- 2024Subcoercive-field dielectric response of 0.5 (Ba 0.7 Ca 0.3 TiO 3 ) -0.5 (BaZr 0.2 Ti 0.8 O 3 ) thin film: peculiar third harmonic signature of phase transitions and residual ferroelectricitycitations
- 2024Active and passive electronic interfaces adapted to a capacitive micromachined ultrasonic transducer (CMUT) used in acoustic energy transfercitations
- 2024BCTZ lead free thin films with Ce doping gradient: enhanced piezoelectricity and relaxor behaviour
- 2024Enhanced piezoelectricity properties and relaxor behaviour in (Ce, Y) co-doped BCTZ thin films libraries
- 2023Subcoercive-field dielectric response of 0.5 (Ba 0.7 Ca 0.3 TiO 3 ) -0.5 (BaZr 0.2 Ti 0.8 O 3 ) thin film: peculiar third harmonic signature of phase transitions and residual ferroelectricity
- 2023Active and passive electronic interfaces adapted to a capacitive micromachined ultrasonic transducer (CMUT) used in acoustic energy transfer
- 2022Real‐time capturing of microscale events controlling the sintering of lead‐free piezoelectric potassium‐sodium niobatecitations
- 2022Multifunctional energy storage and piezoelectric properties of 0.65Pb(Mg1/3Nb2/3)O3–0.35PbTiO3 thick films on stainless-steel substratescitations
- 2022Effect of thermal annealing on dielectric and ferroelectric properties of aerosol-deposited 0.65Pb(Mg1/3Nb2/3)O3-0.35 PbTiO3 thick filmscitations
- 2022Low-Temperature Hydrothermal Growth of ZnO Nanowires on AZO Substrates for FACsPb(IBr)3 Perovskite Solar Cellscitations
- 2022Multifunctional energy storage and piezoelectric properties of 0.65Pb(Mg 1/3 Nb 2/3 )O 3 –0.35PbTiO 3 thick films on stainless-steel substratescitations
- 2022Influence of bottom electrode and seed layer on the growth of ZnO nanowires for vibrational energy harvesting
- 2020Tetragonal tungsten bronze phase thin films in the K–Na–Nb–O system: Pulsed laser deposition, structural and dielectric characterizationscitations
- 2019Deposition Time and Annealing Effects of ZnO Seed Layer on Enhancing Vertical Alignment of Piezoelectric ZnO Nanowirescitations
- 2019Deposition Time and Annealing Effects of ZnO Seed Layer on Enhancing Vertical Alignment of Piezoelectric ZnO Nanowirescitations
- 2019Challenges of low-temperature synthesized ZnO nanostructures and their integration into nano-systemscitations
- 2019Challenges of low-temperature synthesized ZnO nanowires and their integration into nanogenerators
- 2019Annealing and Thickness Effects of ZnO Seed Layer on Improving Alignment of ZnO NWs for Piezoelectric Nanogenerator Application
- 2018Organic/Inorganic Hybrid Stretchable Piezoelectric Nanogenerators for Self-Powered Wearable Electronicscitations
- 2018Organic/Inorganic Hybrid Stretchable Piezoelectric Nanogenerators for Self‐Powered Wearable Electronicscitations
- 2018Challenges of low-temperature synthesized ZnO nanostructures and their integration into nano-systemscitations
- 2017Effect of the incident power on permittivity, losses and tunability of BaSrTiO<sub>3</sub> thin films in the microwave frequency rangecitations
- 2017Effect of the incident power on permittivity, losses and tunability of BaSrTiO 3 thin films in the microwave frequency rangecitations
- 2017Zinc oxide nanowire-parylene nanocomposite based stretchable piezoelectric nanogenerators for self-powered wearable electronicscitations
- 2016Domain wall motions in BST ferroelectric thin films in the microwave frequency rangecitations
- 2016Description of domain wall motions by the hyperbolic law
- 2016Decomposition of the different contributions to permittivity, losses, and tunability in BaSrTiO3 thin films using the hyperbolic lawcitations
- 2015Effect of Manganese Doping of BaSrTiO 3 on Diffusion and Domain Wall Pinningcitations
- 2015Temperature stable BaSrTiO3 thin films suitable for microwave applicationscitations
- 2013A new method of dielectric characterization in the microwave range for high-k ferroelectric thin filmscitations
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article
Real‐time capturing of microscale events controlling the sintering of lead‐free piezoelectric potassium‐sodium niobate
Abstract
Sintering is a very important process in materials science and technological applications. Despite breakthroughs in achieving optimized piezoelectric properties, fundamentals of K$_{0.5}$Na$_{0.5}$NbO$_3$ (KNN) sintering are not yet fully understood, facing densification versus grain growth competition. At present, microscale events during KNN sintering under reducing atmospheres are real-time monitored using a High Temperature-Environmental Scanning Electron Microscope. A two contacting KNN particles model satisfying the Kingery and Berg's bulk diffusion model is reported. Dynamic events like individual grain growth and grain elimination process are explored through a postanalysis of recorded image series. The diffusion coefficient for oxygen vacancies of 10$^{−8}$ cm$^2$ s$^{−1}$ and average boundary mobility of 10$^{−9}$ cm$^4$ J$^{−1}$ s$^{−1}$ are reported for the KNN ceramics. Moreover, the local pore shrinkage is consistent with the Kingery and François's concept of pore stability except that pore curvatures are not all concave, convex or flat due to anisotropic grain-boundary energies. The global grain growth kinetics are described using parabolic and/or cubic laws. The effect of atmospheres and microstructure evolution on the intrinsic and extrinsic contributions to the dielectric response using Rayleigh's law is also explored. These results bring a new breath for KNN sintering studies in order to adapt the sintering process.