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Sulfur adsorber for thick-film exhaust gas sensors.

Title data

Rettig, Frank ; Moos, Ralf ; Plog, Carsten:
Sulfur adsorber for thick-film exhaust gas sensors.
In: Sensors and Actuators B: Chemical. Vol. 93 (2003) Issue 1-3 . - pp. 36-42.
ISSN 0925-4005

Official URL: Volltext

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 03 Feb 2015 06:47
Last Modified: 05 Apr 2016 06:40