Article (Scientific journals)
Use of partial discharges measurements and video recordings to investigate the influence of relative humidity on zinc oxide subjected to high electric fields
Fagnard, Jean-François; Boilet, Laurent; Erauw, Jean-Pierre et al.
2023In Journal of Physics: D Applied Physics, 56 (46), p. 465305
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Keywords :
Surfaces, Coatings and Films; Condensed Matter Physics; flash sintering; zinc oxide; partial discharge; high voltage
Abstract :
[en] This study investigates the influence of humidity on the high voltage behaviour of zinc oxide porous pellets at room temperature, using the phase resolved partial discharge (PRPD) method. The experimental configuration corresponds to the one that would be used for flash sintering cylindrical ZnO pellets at low temperatures in possibly scalable conditions: planar Pt electrodes without Pt paste. The study explores the incubation period by increasing the 50 Hz AC electric field up to 8 kV cm−1 (applied by steps or with a continuous ramp) in an air atmosphere with varying relative humidity (RH). Experiments were repeated on several samples and showed that the maximum amplitude of PDs decreased while their number increased as the RH increased. With the support of video recording of the experiments, different characteristics in the PD pattern evolution with increasing AC voltage could be attributed to various locations between the electrodes, at the sample surface, or at the interface with the electrodes. By examining the PRPDs, it was possible to identify two distinct types of PDs having different thresholds of inception: one type corresponds to PDs occurring mostly at the triple junction ‘ZnO-platinum-air’ or in the ZnO-electrodes gap and depends strongly on the RH level and; the other type corresponds to electric arcs between the electrodes, with an inception threshold much less affected by the RH level.
Disciplines :
Physics
Electrical & electronics engineering
Materials science & engineering
Author, co-author :
Fagnard, Jean-François  ;  Université de Liège - ULiège > Département d'électricité, électronique et informatique (Institut Montefiore) > Applied and Computational Electromagnetics (ACE)
Boilet, Laurent ;  Belgian Ceramic Research Centre, Avenue Gouverneur Cornez, 4, 7000 Mons, Belgium
Erauw, Jean-Pierre ;  Belgian Ceramic Research Centre, Avenue Gouverneur Cornez, 4, 7000 Mons, Belgium
Henrotte, François  ;  Université de Liège - ULiège > Département d'électricité, électronique et informatique (Institut Montefiore) > Applied and Computational Electromagnetics (ACE)
Geuzaine, Christophe  ;  Université de Liège - ULiège > Département d'électricité, électronique et informatique (Institut Montefiore) > Applied and Computational Electromagnetics (ACE)
Vertruyen, Bénédicte  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Vanderbemden, Philippe  ;  Université de Liège - ULiège > Département d'électricité, électronique et informatique (Institut Montefiore) > Capteurs et systèmes de mesures électriques
Language :
English
Title :
Use of partial discharges measurements and video recordings to investigate the influence of relative humidity on zinc oxide subjected to high electric fields
Publication date :
23 August 2023
Journal title :
Journal of Physics: D Applied Physics
ISSN :
0022-3727
eISSN :
1361-6463
Publisher :
IOP Publishing
Volume :
56
Issue :
46
Pages :
465305
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
IMAWA-FLASHINT
Funders :
ERDF - European Regional Development Fund
Gouvernement Wallon
Commentary :
This article may be downloaded for personal use only. Any other use requires prior permission of the author and IOP Publishing. This article appeared in Journal of Physics D: Applied Physics (Vol 56, 465305) and may be found at https://doi.org/10.1088/1361-6463/acee8e
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since 20 September 2023

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