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Aerosol Deposited Thick Film BaFe0.7Ta0.3O3-δ Ceramic for Nitrogen Monoxide Sensing

Title data

Bektas, Murat ; Hanft, Dominik ; Schönauer-Kamin, Daniela ; Stöcker, Thomas ; Hagen, Gunter ; Moos, Ralf:
Aerosol Deposited Thick Film BaFe0.7Ta0.3O3-δ Ceramic for Nitrogen Monoxide Sensing.
Event: COST Action TD1105 EuNetAir, European Environment Agency (EEA) International Meeting on New Sensing Technologies and Methods for Air-Pollution Monitoring , 03.-05.12.2014 , Istanbul, Turkey.
(Conference item: Conference , Speech )

Abstract in another language

The gas sensing properties of the conductometric gas sensor material BaFe0.7Ta0.3O3-δ (BFT30), which has recently found to be a temperature independent oxygen sensor between 800 and 900°C were studied. BFT30 fine powder was produced by mixed-oxide route. The novel aerosol deposition method (ADM) was used to produce BFT30 thick films on alumina substrates with Pt electrodes in four-wire configuration. With ADM, thick and dense ceramic films can be deposited at room temperature directly from the powder.
The sensitivity of BFT30 samples was investigated in environments with various gases (C3H8, NO, NO2, CO, CO2, and H2O) at a constant oxygen partial pressure between 350 and 800 °C. BFT30 sensor exhibits excellent sensing properties to NO at 350 and 400 °C with a high selectivity towards all other examined gas species. Figure 1a shows the normalized resistance, SNO = R/R0, of a BFT30 ADM-coated sensor under the presence of NO in concentrations between 250 and 2000 ppm in flowing synthetic air. The sensor responds fast, stably and reversibly to NO. Especially low NO concentrations seem to affect the sensor response strongly. Figure 1b shows the NO dependence of the ADM BFT30 sensor at lower NO concentrations from 1.5 to 100 ppm. BFT30 sensor material is a good candidate as NO sensor for air quality control applications at 400 °C, when the oxygen concentration remains constant.

Further data

Item Type: Conference item (Speech)
Refereed: Yes
Institutions of the University: Faculties
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: 11 May 2015 10:15
Last Modified: 15 Apr 2016 08:00