Zirconia-based mixed potential sensor with Pt electrode prepared by spin-coating of polymeric precursor

A. Chrzan; Ł. Woźniak; D. Szymczewska; P. Jasiński

doi:10.1117/12.2247539

10 November 2016 Zirconia-based mixed potential sensor with Pt electrode prepared by spin-coating of polymeric precursor

A. Chrzan, Ł. Woźniak, D. Szymczewska, P. Jasiński

Author Affiliations +

Proceedings Volume 10161, 14th International Conference on Optical and Electronic Sensors; 101610A (2016) https://doi.org/10.1117/12.2247539
Event: 14th International Conference on Optical and Electronic Sensors, 2016, Gdansk, Poland

Abstract

Many types of yttria-stabilized zirconia (YSZ) based gas sensors have been explored extensively in recent years. Great attention have been directed to mixed-potential-type gas sensors. It is due to growing concerns with environmental issues. Not without a significance is the fact of very attractive performance of this type of sensor allowing to detect low concentration of pollutant gases. In this paper two types of YSZ based mixed-potential planar sensors were investigated, with platinum electrode painted using commercial paste and with spin coated platinum layer. Both types had second electrode in the form of porous gold. Measurements were performed at 400 °C in synthetic air and different concentrations of SO₂. Gas flow was set to 100 cm³min^-1 and the concentration of 50 ppm SO₂ was tested. During this measurements the sensor was sintered in-situ at increasing temperatures. Sensor with 100 nm spin-coated platinum layer sintered at 700 °C was shown to exhibit two times smaller response than sensor with 5 μm porous electrode, while consisting of over 20 times smaller amount of Pt. The influence of sintering temperature on electrical conductivity of platinum films was also examined. Moreover, the platinum microstructure was investigated using SEM microscopy.

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A. Chrzan, Ł. Woźniak, D. Szymczewska, and P. Jasiński "Zirconia-based mixed potential sensor with Pt electrode prepared by spin-coating of polymeric precursor", Proc. SPIE 10161, 14th International Conference on Optical and Electronic Sensors, 101610A (10 November 2016); https://doi.org/10.1117/12.2247539

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KEYWORDS

Platinum

Sensors

Electrodes

Scanning electron microscopy

Gold

Temperature metrology

Gas sensors

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