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Thermopower and Conductivity of Aerosol Deposited Gas Sensitive BaFe1-xTaxO3-δ Films

Title data

Bektas, Murat ; Stöcker, Thomas ; Hagen, Gunter ; Moos, Ralf:
Thermopower and Conductivity of Aerosol Deposited Gas Sensitive BaFe1-xTaxO3-δ Films.
2017
Event: Sensor 2017 : 18th International Conference on Sensors and Measurement Technology , 30.05.-01.06.2017 , Nürnberg, Deutschland.
(Conference item: Conference , Poster )
DOI: https://doi.org/10.5162/sensor2017/P5.9

Official URL: Volltext

Abstract in another language

In this study, the thermopower and the electrical conductivity of BaFe1-xTaxO3- sensor films were measured for x in the range of 0.1 to 0.45 (BFTx). Seebeck coefficient and conductivity were measured simultaneously between 400 and 850 °C under varying oxygen partial pressures from 0.01 to 1 bar. BFTx fine powders were prepared by a conventional mixed-oxide route. Crystal structure and phase purity were investigated by X-ray diffraction. BFTx thick-films were successfully deposited by the novel Aerosol Deposition Method (ADM) at room temperature on a special transducer. Both thermopower and electrical conductivity of samples with tantalum contents between x = 0.2 and 0.3 show almost no temperature dependency but dependent strongly on the oxygen partial pressure in the temperature range from 700 to 850 °C. Therefore making a combined, thermoelectric-conductometric sensing principle for temperature independent oxygen sensors is possible.

Further data

Item Type: Conference item (Poster)
Refereed: Yes
Additional notes: Chapter P5 - Gas, Chemo and Biosensors
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
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Faculties
Faculties > Faculty of Engineering Science > Chair Functional Materials
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 Jun 2017 09:08
Last Modified: 26 Jun 2017 09:08
URI: https://eref.uni-bayreuth.de/id/eprint/38168