Titlebar

Bibliografische Daten exportieren
Literatur vom gleichen Autor
plus auf ERef Bayreuth
plus bei Google Scholar

 

Combined resistive and thermoelectric oxygen sensor with almost temperature-independent characteristics

Titelangaben

Bektas, Murat ; Stöcker, Thomas ; Mergner, Angelika ; Hagen, Gunter ; Moos, Ralf:
Combined resistive and thermoelectric oxygen sensor with almost temperature-independent characteristics.
In: Journal of Sensors and Sensor Systems. Bd. 7 (2018) . - S. 289-297.
ISSN 2194-878X
DOI: https://doi.org/10.5194/jsss-7-289-2018

Angaben zu Projekten

Projekttitel:
Offizieller ProjekttitelProjekt-ID
Ohne AngabeMO1060/22-1

Projektfinanzierung: Deutsche Forschungsgemeinschaft

Abstract

The present study is focused in two directions. In the first part, BaFe(1 − x) − 0.01Al0.01TaxO3−δ (BFATx) thick films with a Ta content between 0.1 and 0.4 were manufactured using the novel room temperature coating method "aerosol deposition" (ADM), and its material properties were characterized to find the best composition of BFATx for temperature-independent oxygen sensors. The material properties "Seebeck coefficient" and "conductivity" were determined between 600 and 800 °C at different oxygen partial pressures. BaFe0.69Al0.01Ta0.3O3−δ (BFAT30) was found out to be very promising due to the almost temperature-independent behavior of both the conductivity and the Seebeck coefficient. In the second part of this study, films of BFAT30 were prepared on a special transducer that includes a heater, equipotential layers, and special electrode structures so that a combined direct thermoelectric/resistive oxygen sensor of BFAT30 with almost temperature-independent characteristics of both measurands, Seebeck coefficient and conductance could be realized. At high oxygen partial pressures (pO2 > 10^−5 bar), the electrical conductance of the sensor shows an oxygen sensitivity of m  =  0.24 (with m being the slope in the logσ vs. logpO2 representation according to the behavior of σαpO2^m), while the Seebeck coefficient changes with a slope of −38 µV /K per decade of pO2 at 700 °C. However, at low pO2 (pO2 < 10^−14 bar) the conductance and the Seebeck coefficient change with pO2, with a slope of m  =  −0.23 and −21.2 µV/K per decade pO2, respectively.

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
Profilfelder > Advanced Fields > Neue Materialien
Forschungseinrichtungen > Forschungszentren > Bayreuther Materialzentrum - BayMAT
Forschungseinrichtungen > Forschungsstellen > ZET - Zentrum für Energietechnik
Forschungseinrichtungen > Forschungsstellen > BERC - Bayreuth Engine Research Center
Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien
Profilfelder
Profilfelder > Advanced Fields
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Forschungseinrichtungen > Forschungsstellen
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 18 Apr 2018 06:01
Letzte Änderung: 08 Nov 2018 10:47
URI: https://eref.uni-bayreuth.de/id/eprint/43541