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Effect of ambient conditions on the resistance of metal oxides as a novel material for outer corona protection systems


Wagner, Ricarda ; Bauer, Johann ; Plochmann, Bastian ; Lang, Steffen ; Schönauer-Kamin, Daniela ; Moos, Ralf:
Effect of ambient conditions on the resistance of metal oxides as a novel material for outer corona protection systems.
Veranstaltung: 36th Electrical Insulation Conference (EIC) , 17.-20.6.2018 , San Antonio, TX, USA.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung , Poster )

Angaben zu Projekten

Offizieller ProjekttitelProjekt-ID
Ohne Angabe03XP0020C

Projektfinanzierung: Bundesministerium für Bildung und Forschung


Antimony doped tin oxide, a known gas sensing material, is investigated as a possible substitute for carbon black as filler for outer corona protection systems. Therefore it is necessary to prove the stability of electrical resistance and reversibility during exposure to discharge products like UVradiation, ozone and NO2. Furthermore, the location of aircooled generators can vary and with it the surrounding atmosphere, for example humidity. Samples of particle filled resin films are prepared and the resistance is measured while exposed to different diluted gases (varying O2, H2, humidity and NO2 in the gas atmosphere at 100 °C). The resistance changes with varying O2 (%-range) and NO2 (ppm-range) concentrations. These effects are enhanced by UV-radiation (365 nm). All measured resistance changes are reversible but there is a long relaxation time. Besides, both the matrix material and the particle geometry of the Sb-doped SnO2 were changed. It was found that the resistance stability depends on the combination of matrix material and particle geometry. We found a link between resistance change and surface roughness, whereby a smoother surface seems to be more stable. The influence of ozone on the film resistance was also measured: Small amounts of ozone (< 1ppm) do not change the resistance of a compound film during ten days at room temperature. Hence, it is concluded that antimonydoped-SnO2-compound-films are stable against different gas species and UV-light. However, it is important to choose a proper particle-resin combination for a smooth surface resulting in improved resistance stability.

Weitere Angaben

Publikationsform: Veranstaltungsbeitrag (Poster)
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien > Lehrstuhl Funktionsmaterialien - Univ.-Prof. Dr.-Ing. Ralf Moos
Profilfelder > Advanced Fields > Neue Materialien
Forschungseinrichtungen > Forschungszentren > Bayreuther Materialzentrum - BayMAT
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien
Profilfelder > Advanced Fields
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 04 Jul 2018 05:50
Letzte Änderung: 04 Jul 2018 05:50
URI: https://eref.uni-bayreuth.de/id/eprint/44955