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Sulfur adsorber for thick-film exhaust gas sensors.

Titelangaben

Rettig, Frank ; Moos, Ralf ; Plog, Carsten:
Sulfur adsorber for thick-film exhaust gas sensors.
In: Sensors and Actuators B: Chemical. Bd. 93 (2003) Heft 1-3 . - S. 36-42.
ISSN 0925-4005
DOI: https://doi.org/10.1016/S0925-4005(03)00334-4

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

Due to increasing environmental requirements the automotive industry may need novel gas sensors for exhaust gas applications in the future. Employed directly in the tailpipe, these sensors have to withstand the harsh and aggressive conditions that are present in engine exhausts. Being one of the most critical components, sulfur oxides may be a reason for reduced long-term stability. This paper deals with the realization of porous sulfur oxide adsorbers that are applied onto the sensitive film of such sensors. Deduced from diffusion calculations an optimal range for pore diameters and adsorber thickness was found and successfully implemented utilizing carbonates as adsorbing materials. The tests were performed using earth alkaline containing and temperature-independent resistive titanate thick-film oxygen sensors as an example for sulfur instable gas sensor materials. It was found that porous carbonate adsorbers could protect these materials in such a way that sensors can be operated for more than 450 h in a sulfur oxide enriched atmosphere without deterioration. The influence of adsorbers on the sensor response time was estimated and validated to be negligible in the applied pore diameter and adsorber thickness range.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien > Lehrstuhl Funktionsmaterialien - Univ.-Prof. Dr.-Ing. Ralf Moos
Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien
Profilfelder > Advanced Fields > Neue Materialien
Forschungseinrichtungen > Forschungszentren > Bayreuther Materialzentrum - BayMAT
Profilfelder
Profilfelder > Advanced Fields
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 03 Feb 2015 06:47
Letzte Änderung: 05 Apr 2016 06:40
URI: https://eref.uni-bayreuth.de/id/eprint/6162