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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
Leading Role of Grain Boundaries in Colossal Permittivity of Doped and Undoped CCTO
Abstract
The role of grain boundaries in the colossal permittivityof doped and undoped calcium copper titanate, CaCu3Ti4O12 (CCTO), is illustrated by a first correlationover four orders of magnitudebetweenand the capacity of grain boundaries, not that of grains, deduced from the analysis of impedance measurements. The DC resistance of the CCTO sample which is essential to make efficient capacitors for technological applications, as well as the loss factor tan(δ), are found to be correlated with the resistance of the grain boundaries rather than that of the grains. The correlation extends over almost seven orders of magnitude. These findings, consistent with the internal barrier layer capacitance (IBLC) model, indicate the leading role of grain boundaries in the origin of the capacitance of CCTO samples.