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Tuning of the electrical conductivity of Sr(Ti,Fe)O₃ oxygen sensing films by aerosol co-deposition with Al₂O₃

Title data

Exner, Jörg ; Schubert, Michael ; Hanft, Dominik ; Stöcker, Thomas ; Fuierer, Paul ; Moos, Ralf:
Tuning of the electrical conductivity of Sr(Ti,Fe)O₃ oxygen sensing films by aerosol co-deposition with Al₂O₃.
In: Sensors and Actuators B: Chemical. Vol. 230 (2016) . - pp. 427-433.
ISSN 0925-4005
DOI: https://doi.org/10.1016/j.snb.2016.02.033

Project information

Project title:
Project's official titleProject's id
No informationMO1060/20

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Iron-substituted strontium titanate Sr(Ti,Fe)O3 (STF) is a semiconducting oxygen sensing ceramic, and features a temperature independent conductivity at temperatures between 700 and 800 °C for the composition SrTi0.65Fe0.35O3–δ (STF35). Aerosol deposition (AD) offers advantages as a means of producing thick films of this sensor material. In this work, aerosol co-deposition of ceramics (AcDc) was used to tune the functional properties of STF35 by incorporating alumina particles directly. Composite films of STF35:Al2O3 with homogeneously distributed particle fractions were successfully deposited by AcDc. The conductivity of films was tunable over an order of magnitude with up to 60 volume percent alumina, and the temperature independent oxygen sensing behavior, as observed in bulk ceramics, was retained. Higher percentages of alumina decreased the conductivity further (up to four orders of magnitude) but the sensor response characteristic to oxygen disappeared.

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
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: 18 Apr 2018 05:56
Last Modified: 08 Nov 2018 10:46
URI: https://eref.uni-bayreuth.de/id/eprint/43428