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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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Autret, Cecile
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2019Comparison of colossal permittivity of CaCu3Ti4O12 with commercial grain boundary barrier layer capacitorcitations
- 2019Comparison of colossal permittivity of CaCu3Ti4O12 with commercial grain boundary barrier layer capacitorcitations
- 2018Control of grain boundary in alumina doped CCTO showing colossal permittivity by core-shell approachcitations
- 2018Control of grain boundary in alumina doped CCTO showing colossal permittivity by core-shell approachcitations
- 2017Laser fluence and spot size effect on compositional and structural properties of BiFeO 3 thin films grown by Pulsed Laser Depositioncitations
- 2016Local analysis of the grain and grain boundary contributions to the bulk dielectric properties of Ca(Cu 3−y Mg y )Ti 4 O 12 ceramics: Importance of the potential barrier at the grain boundarycitations
- 2015An Investigation of Na 1-X Li 2x Mn y Ni z O d Compounds for High Performance Sodium-Ion Batteries
- 2015An Electrochemical Study of Fe1.18Sb1.82 as Negative Electrode for Sodium Ion Batteriescitations
- 2015Capacitance Scaling of Grain Boundaries with Colossal Permittivity of CaCu3Ti4O12-Based Materialscitations
- 2015Capacitance Scaling of Grain Boundaries with Colossal Permittivity of CaCu3Ti4O12-Based Materialscitations
- 2015An Investigation of Na<sub>1-X</sub>Li<sub>2x </sub>Mn<sub>y</sub>Ni<sub>z</sub>O<sub>d</sub> Compounds for High Performance Sodium-Ion Batteries
- 2015Sintering of nanostructured Sc2O3 ceramics from sol-gel-derived nanoparticlescitations
- 2014Leading Role of Grain Boundaries in Colossal Permittivity of Doped and Undoped CCTOcitations
- 2014Leading Role of Grain Boundaries in Colossal Permittivity of Doped and Undoped CCTOcitations
- 2013Polypyrrole/lanthanum strontium manganite oxide nanocomposites: Elaboration and characterizationcitations
- 2013Polypyrrole/lanthanum strontium manganite oxide nanocomposites: Elaboration and characterizationcitations
- 2013Cu-Doping Effect on Dielectric Properties of Organic Gel Synthesized Ba4YMn3-xCuxO11.5±δcitations
- 2012Dielectric Properties of Hexagonal Perovskite Ceramics Prepared by Different Routescitations
Places of action
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article
Control of grain boundary in alumina doped CCTO showing colossal permittivity by core-shell approach
Abstract
Grain boundaries of CaCu3Ti4O12 (CCTO) materials have been shown to play leading role in colossal permittivity. Core-shell design is an attractive approach to make colossal dielectric capacitors by controlling the grain boundaries. Core-shell grains of CCTO surrounded by Al2O3 shell were synthesized by ultrasonic sol-gel reaction from alumina alkoxide precursor. The influence of alumina shell by comparison with bare CCTO grains was studied. Particularly, microstructure, dielectric and electric effects on sintered ceramics are reported. The average grain size and the density are increased compared to undoped CCTO leading to an improvement of permittivity from 58,000 to 81,000 at 1 kHz. Furthermore a decrease of dielectric loss is found in a frequency range of 10(2)-10(3) Hz. Moreover, the activation energy of grain boundaries is increased from 0.55 to 0.73 eV and the electrical properties such as breakdown voltage, non-linear coefficient and resistivity are improved with the aim of making industrial capacitors.