Journal of Electroceramics

, Volume 15, Issue 2, pp 151–157 | Cite as

Thick Film Planar CO2 Sensors Based on Na β-Alumina Solid Electrolyte

  • Hyun Seok Hong
  • Jun Woong Kim
  • Sang Jin Jung
  • Chong Ook Park


Practical small-sized thick film CO2 sensor with self-heater was fabricated with Na β -Alumina (NBA), Na2Ti6O13-TiO2, and Na2CO3 as a solid electrolyte, reference electrode, and a sensing electrode, respectively. The measured EMF from the sensor followed the Nernstian behavior with CO2 concentration change in the range of 400 to 600C (350–580 mW power consumption). However, in the aspect of stability, densification of the NBA thick film and prevention of Na2CO3 evaporation were needed. In this study, an Al2O3 porous layer deposited on Na2CO3 was effective in improving the durability during operation of the sensor. It is thought that Al2O3 suppresses evaporation of Na2CO3.


thick film self-heater CO2 sensor NBA evaporation 


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Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  • Hyun Seok Hong
    • 1
  • Jun Woong Kim
    • 1
  • Sang Jin Jung
    • 2
  • Chong Ook Park
    • 1
  1. 1.Department of Materials Sci. & EngineeringKorea Advanced Institute of Science and TechnologyYuseong-GuSouth Korea
  2. 2.Electronic Ceramics CenterDong-Eui UniversityBusanjin-guSouth Korea

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