| 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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Moos, Ralf
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (28/28 displayed)
- 2024Powder aerosol deposited calcium cobaltite as textured P-type thermoelectric material with power factors approaching single crystal valuescitations
- 2023Gauge to simultaneously determine the electrical conductivity, the Hall constant, and the Seebeck coefficient up to 800 °C
- 2023Analysis of defect mechanisms in nonstoichiometric ceria–zirconia by the microwave cavity perturbation methodcitations
- 2023Chemical expansion of CeO2−δ and Ce0.8Zr0.2O2−δ thin films determined by laser Doppler vibrometry at high temperatures and different oxygen partial pressurescitations
- 2021Novel, low-cost device to simultaneously measure the electrical conductivity and the Hall coefficient from room temperature up to 600 °Ccitations
- 2021Linking the Electrical Conductivity and Non-Stoichiometry of Thin Film Ce1−xZrxO2−δ by a Resonant Nanobalance Approachcitations
- 2021Linking the electrical conductivity and non-stoichiometry of thin film Ce1−xZrxO2−δ by a resonant nanobalance approachcitations
- 2020Determination of the Dielectric Properties of Storage Materials for Exhaust Gas Aftertreatment Using the Microwave Cavity Perturbation Methodcitations
- 2020Cyclic and square-wave voltammetry for selective simultaneous NO and O2 gas detection by means of solid electrolyte sensorscitations
- 2019Manufacturing Dense Thick Films of Lunar Regolith Simulant EAC-1 at Room Temperaturecitations
- 2019Flexible, heat-resistant and flame-retardant glass fiber nonwoven/glass platelet-composite separator for lithium-ion batteries
- 2016Platform to develop exhaust gas sensors manufactured by glass-solder-supported joining of sintered yttria-stabilized zirconiacitations
- 2016Effect of annealing on the permittivity of ceramic films manufactured by the Aerosol Deposition Method
- 2015Effect of annealing on the permittivity of ceramic films prepared by the Aerosol Deposition Method
- 2015Some practical points to consider with respect to thermal conductivity and electrical resistivity of ceramic substrates for high-temperature gas sensorscitations
- 2014A laboratory test setup for in situ measurements of the dielectric properties of catalyst powder samples under reaction conditions by microwave cavity perturbation: set up and initial testscitations
- 2014Detection of NO by pulsed polarization technique using Pt interdigital electrodes on yttria-stabilized zirconiacitations
- 2012Influence of sintering conditions on doped PZT ceramics for base-metal electrode multilayer actuatorscitations
- 2008Defect chemistry of donor-doped and undoped strontium titanate ceramics between 1000° and 1400°C
- 2008Dependence of the intrinsic conductivity minimum of SrTiO3 ceramics on the sintering atmosphere
- 2008Hall mobility of undoped n-type conducting strontium titanate single crystals between 19 K and 1373 K
- 2008Solubility of lanthanum in strontium titanate in oxygen-rich atmospheres
- 2006Nanoscaled p-type semiconductors for gas sensing : nanopowders, nanofilms, and nanowires
- 2006Effect of electrodes and zeolite cover layer on hydrocarbon sensing with p-type perovskite SrTi0.8Fe0.2O3-δ thick and thin filmscitations
- 2005Hydrocarbon sensing with thick and thin film p-type conducting perovskite materialscitations
- 2004Hydrocarbon sensing with thick and thin film p-type conducting perovskite materials
- 2004Thick and thin film p-type conducting perovskite materials for hydrocarbon sensing
- 2003A hydrocarbon sensor based on p-type strontium titanate ferrate
Places of action
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article
Determination of the Dielectric Properties of Storage Materials for Exhaust Gas Aftertreatment Using the Microwave Cavity Perturbation Method
Abstract
<jats:p>Recently, a laboratory setup for microwave-based characterization of powder samples at elevated temperatures and different gas atmospheres was presented. The setup is particularly interesting for operando investigations on typical materials for exhaust gas aftertreatment. By using the microwave cavity perturbation method, where the powder is placed inside a cavity resonator, the change of the resonant properties provides information about changes in the dielectric properties of the sample. However, determining the exact complex permittivity of the powder samples is not simple. Up to now, a simplified microwave cavity perturbation theory had been applied to estimate the bulk properties of the powders. In this study, an extended approach is presented which allows to determine the dielectric properties of the powder materials more correctly. It accounts for the electric field distribution in the resonator, the depolarization of the sample and the effect of the powder filling. The individual method combines findings from simulations and recognized analytical approaches and can be used for investigations on a wide range of materials and sample geometries. This work provides a more accurate evaluation of the dielectric powder properties and has the potential to enhance the understanding of the microwave behavior of storage materials for exhaust gas aftertreatment, especially with regard to the application of microwave-based catalyst state diagnosis.</jats:p>