Study of the behaviour of CeO2 in SO2-containing environment

E. B. Várhegyi, J. Gerblinger, F. Réti, I. V. Perczel, H. Meixner

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The undoped n-type semiconductor CeO2 is a less studied but in many respects promising potential new sensor material. As in our former experiments (using different reactive gases) CeO2 proved to be a highly corrosion-resistant material, in this work detailed investigations have been carried out on its electrical and corrosion behaviour in a wide temperature range (300-800 °C) in oxygen- and SO2-containing atmospheres. Our most important results can be summarized as: (a) the resistance of CeO2 is practically uninfluenced either at 350 or 800 °C by SO2 if oxygen is present; (b) around these two temperatures no corrosive effect of SO2 can be observed either; (c) but at 550 °C in the presence of oxygen, the acceptor effect of SO2 can be observed; (d) at 550 °C during long-term heat treatment (100 h) in an SO2- and oxygen-containing atmosphere, the CeO2 in a thin surface layer transforms into CeO and the same time a reversible incorporation of a few percent of S into this layer can be observed. In the present work the connection between the sensitivity maximum for SO2 found at 550 °C in the presence of oxygen and a possible surface phase transformation is discussed.

Original languageEnglish
Pages (from-to)631-635
Number of pages5
JournalSensors and Actuators, B: Chemical
Volume25
Issue number1-3
DOIs
Publication statusPublished - 1995

Fingerprint

Oxygen
oxygen
corrosion
Corrosive effects
Corrosion
atmospheres
n-type semiconductors
phase transformations
surface layers
heat treatment
Gases
Phase transitions
Heat treatment
Semiconductor materials
Temperature
temperature
sensitivity
sensors
Sensors
gases

Keywords

  • Cerium dioxide
  • Sulfur dioxide sensors

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Instrumentation
  • Analytical Chemistry
  • Electrochemistry

Cite this

Study of the behaviour of CeO2 in SO2-containing environment. / Várhegyi, E. B.; Gerblinger, J.; Réti, F.; Perczel, I. V.; Meixner, H.

In: Sensors and Actuators, B: Chemical, Vol. 25, No. 1-3, 1995, p. 631-635.

Research output: Contribution to journalArticle

Várhegyi, E. B. ; Gerblinger, J. ; Réti, F. ; Perczel, I. V. ; Meixner, H. / Study of the behaviour of CeO2 in SO2-containing environment. In: Sensors and Actuators, B: Chemical. 1995 ; Vol. 25, No. 1-3. pp. 631-635.
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