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Effect of electrodes and zeolite cover layer on hydrocarbon sensing with p-type perovskite SrTi0.8Fe0.2O3-δ thick and thin films

Title data

Sahner, Kathy ; Schönauer-Kamin, Daniela ; Moos, Ralf ; Matam, Mahesh ; Post, Michael L.:
Effect of electrodes and zeolite cover layer on hydrocarbon sensing with p-type perovskite SrTi0.8Fe0.2O3-δ thick and thin films.
In: Journal of Materials Science. Vol. 41 (2006) Issue 18 . - pp. 5828-5835.
ISSN 1573-4803
DOI: https://doi.org/10.1007/s10853-006-0299-x

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
No information01SF0201 9.2

Project financing: Bundesministerium für Bildung und Forschung

Abstract in another language

Screen-printed thick film as well as pulsed laser deposited thin film sensors of the perovskite SrTi0.8Fe0.2O3-δ (STF20) with gold electrodes present poor hydrocarbon selectivity when exposed to different gases (hydrocarbons, hydrogen, NO, and CO). By employing Pt-electrodes, response to H2 and CO is eliminated. In the case of thick film devices, only NO cross interference persists. The selectivity of the thick films is further increased by applying a Pt doped zeolite (ZSM-5) as a cover layer. By adjusting the thickness of the ZSM-5 cover layer, the film selectively senses mainly saturated hydrocarbons such as propane, suppressing the response towards all the other gases. This effect is attributed to the catalytic effect of the high Pt-content of the ZSM-5 zeolite. Application of a ZSM-5 cover layer to thin films enhances the sensor output response to propane, thus reducing selectivity for unsaturated hydrocarbons. A sensor configuration having Pt electrodes on top of an STF20 thick film with an additional 50 μm cover layer of ZSM-5 was found to be the most suitable to selectively sense saturated hydrocarbons. Thin film STF20 sensors equipped with Pt-IDC electrodes and without the zeolite cover layer, were found to perform best for unsaturated hydrocarbons at 400°C.

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
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: 26 Jan 2015 09:16
Last Modified: 06 Apr 2016 06:49
URI: https://eref.uni-bayreuth.de/id/eprint/5997