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Rettig, Frank ; Moos, Ralf:
Semiconducting direct thermoelectric gas sensors.
In: Jaaniso, Raivo ; Tan, Ooi Kiang
(Hrsg.):
Semiconductor gas sensors. 2nd Edition. -
Cambridge, UK
: Woodhead Publishing
,
2020
. - S. 347-384
ISBN 978-0-08-102559-8
DOI: https://doi.org/10.1016/B978-0-08-102559-8.00011-2
Abstract
This chapter deals with semiconducting direct thermoelectric gas sensors (DTEGs) based on oxide materials. The principle of the sensor is based on a direct measurement of the position of the Fermi level, which can be strongly dependent on the concentration of an analyte in the ambience. The DTEG principle measures a path-independent quantity—the thermovoltage. This makes the sensors extremely resistant to damage stemming from abrasives in gas streams. This chapter shows the importance of developing an adequate transducer and includes a careful analysis of the sensor signals obtained. From a technological point of view, an integration of an equipotential layer for better signal quality will appear to be necessary. Considerable effort is spent on the thermal design of the transducers using finite element method (FEM) modeling. The gas sensitive material itself is analyzed by an FEM model in terms of semiconductor equations combined with thermoelectric equations. The R&D efforts described culminate in a transfer to real-world sensors, which is reported in the final section. The DTEGs manufactured show a fast response and are stable and reproducible. DTEGs can be an alternative to the commonly used resistive or conductometric gas sensors.
Weitere Angaben
| Publikationsform: | Aufsatz in einem Buch |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | Gas sensor; Simulation; Thermoelectric; Thermopower; Tin oxide |
| 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 Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien Profilfelder Profilfelder > Advanced Fields Forschungseinrichtungen Forschungseinrichtungen > Forschungszentren |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 09 Feb 2021 07:40 |
| Letzte Änderung: | 09 Feb 2021 07:40 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/62837 |