Carbon-monoxide sensors based on thin films of BaSnO3

Uwe Lampe, Josef Gerblinger, Hans Meixner

Research output: Contribution to journalArticle

91 Citations (Scopus)

Abstract

BaSnO3 is a very promising sensor material for detecting carbon monoxide. The mechanism of CO sensitivity of this metal oxide is supposed to be a surface reaction process. Thus to get a high gas sensitivity, the CO elementary sensor is realized as a thin film. The sensitivities of the BaSnO3 thin films to CO are measured as a function of the temperature and the oxygen concentration. As the most important cross-sensitivities, the influence of humidity, methane and hydrogen on the sensor signal has been examined. The CO sensitivity shows a maximum in the range 600-700 °C under dry conditions. Humidity has a different influence on the CO sensitivity, which depends on the oxygen concentration. The cross-sensitivity to methane can be described by the sum of the sensitivities to CO and methane.

Original languageEnglish
Pages (from-to)657-660
Number of pages4
JournalSensors and Actuators: B. Chemical
Volume25
Issue number1-3
DOIs
Publication statusPublished - Apr 1995

Keywords

  • Barium stannate
  • Carbon monoxide sensors
  • Thin-film sensors

ASJC Scopus subject areas

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

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