NOx sensors based on interfacing yttria stabilized zirconia with p and n-type semiconducting oxides

M. L. Grilli*, E. Di Bartolomeo, Enrico Traversa

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

9 Scopus citations

Abstract

Electrochemical NOx sensors based on coupling yttria stabilized zirconia (YSZ), an oxygen-ion conductor, with different semiconducting oxides as auxiliary phase were studied. Nanosized LaFeO3 perovskite-type oxide, a p-type semiconductor, and n-type WO3 were used as auxiliary phases because of their NO2 sensing properties in resistive-type devices. LaFeO3 or WO3 thick films were deposited using a screen printing oil on one side of the solid-electrolyte pellets. The sensors were fully exposed to the same atmosphere. Electromotive force (EMF), polarization curves, amperometric and electrochemical impedance spectroscopy (EIS) measurements, were performed in air and at different concentrations of NO2 in air, at selected temperatures.

Original languageEnglish (US)
Pages (from-to)1243-1246
Number of pages4
JournalKey Engineering Materials
Volume206-213
Issue numberII
StatePublished - Nov 9 2001
Event7th Conference and Exhibition of the European Ceramic Society - Brugge, Belgium
Duration: Sep 9 2001Sep 13 2001

Keywords

  • Electrochemical NO sensors
  • Semiconducting auxiliary phase
  • YSZ based sensors

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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