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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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Taylor, John
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2018Freeze cast porous barium titanate for enhanced piezoelectric energy harvestingcitations
- 2018Corrigendum to “Modelling and fabrication of porous sandwich layer barium titanate with improved piezoelectric energy harvesting figures of merit” [Acta Mater. 128 (2017) 207–217](S1359645417301209)(10.1016/j.actamat.2017.02.029)citations
- 2017Modelling and fabrication of porous sandwich layer barium titanate with improved piezoelectric energy harvesting figures of meritcitations
- 2016Inexpensive and fast pathogenic bacteria screening using field-effect transistorscitations
- 2016Manufacture and characterization of porous ferroelectrics for piezoelectric energy harvesting applicationscitations
- 2014Manufacturing and characterization of Magnéli phase conductive fibrescitations
- 2013Hot tear susceptibility of Al-Mg-Si alloys with varying iron contentscitations
- 2012AC electrical properties of TiO2 and Magnéli phases, TinO2n−1citations
- 2011Impedance spectroscopy analysis of Ti n O 2n-1 Magnéli phasescitations
- 2011Impedance spectroscopy analysis of TinO2n-1 Magnéli phasescitations
- 2010Nanostructured electrodes for biocompatible CMOS integrated circuitscitations
- 2009Formation of a porous alumina electrode as a low-cost CMOS neuronal interfacecitations
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article
Impedance spectroscopy analysis of TinO2n-1 Magnéli phases
Abstract
This letter presents a comprehensive impedance spectroscopy characterisation of Magneli phases (TinO2n-1) over a range of temperatures, which are of interest in electrochemistry and sensing applications, with the aim to enhance the understanding of their electrical properties and influence their microstructure. The impedance of the TinO2n-1 can be resolved into two different contributions, namely the grain bulk (RB) and grain boundaries (RGB). The ac conductivity increases with frequency and temperature, following a universal power law. The high relative permittivity (105-106), which is relatively frequency independent from 0.1Hz to 100kHz, is attributed to the presence of insulating grain boundaries (RGBRB) creating an Internal Barrier Layer Capacitor (IBLC) effect. Above 100kHz, the grain boundaries begin to contribute to the ac conductivity and the permittivity drops sharply.