| People | Locations | Statistics |
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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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Pennock, Stephen
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2019Improved permittivity and permeability measurement in open or short circuit terminated test fixtures
- 2014Manufacturing and characterization of Magnéli phase conductive fibrescitations
- 2014Investigation of soil contamination by iron pipe corrosion and its influence on GPR detectioncitations
- 2014Improved GPR image focussing with repetitive normalised Superimposition techniquescitations
- 2012AC electrical properties of TiO2 and Magnéli phases, TinO2n−1citations
- 2012In-pipe GPR configuration and the determination of target depth and ground permittivitycitations
- 2011Impedance spectroscopy analysis of TinO2n-1 Magnéli phasescitations
- 2010Effects of iron pipe corrosion on GPR detectioncitations
Places of action
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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.