Capacitive-type gas sensor for the selective detection of carbon dioxide

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Abstract

The capacitances of CuO mixed with BaSnO3, CaTiO3, and ZnO are dependent on the CO2 concentration, similarly to that of CuO-BaTiO3. In particular, the mixed oxide CuO-SrTiO3 is more sensitive to CO2 than CuO-BaTiO3, and the mixed-oxide capacitor CuO-BaSnO3 is promising for sensing CO2 over a wide range of concentrations. Moreover, addition of Ag to CuO-BaTiO3 mixed oxide is effective for enhancing the sensitivity to CO2. The sensitivity (CCO2/Cair) to 2% CO2 of Ag-added CuO-BaTiO3, which has been calcined at 700 °C followed by operation for 60 h, is as high as 70.

Original languageEnglish
Pages (from-to)470-472
Number of pages3
JournalSensors and Actuators: B. Chemical
Volume13
Issue number1-3
DOIs
Publication statusPublished - May 1993
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • 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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