5. DC Electrical-Biased, All-Oxide Nox Sensing Elements for Use at 873K

  1. Sheng Yao,
  2. Bruce Tuttle,
  3. Clive Randall and
  4. Dwight Viehland
  1. David West,
  2. Frederick Montgomery and
  3. Timothy Armstrong

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291252.ch5

Advances in Electronic Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 26, Number 5

Advances in Electronic Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 26, Number 5

How to Cite

West, D., Montgomery, F. and Armstrong, T. (2005) DC Electrical-Biased, All-Oxide Nox Sensing Elements for Use at 873K, in Advances in Electronic Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 26, Number 5 (eds S. Yao, B. Tuttle, C. Randall and D. Viehland), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291252.ch5

Author Information

  1. Oak Ridge National Laboratory Oak Ridge, TN 37831-6083

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982350

Online ISBN: 9780470291252

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Keywords:

  • magnitude;
  • sensitivity;
  • exponentially;
  • simultaneous;
  • catalytic

Summary

All-oxide NOx sensing elements based on a solid electrolyte are reported. During operation, a DC current or voltage is applied to the element, and the resultant voltage or current is used as a sensing signal. The elements are nearly “total NOx”, with responses to NO and NO2 of the same algebraic sign and similar magnitude. For example, 77 ppmv NO produces a voltage change of −37% and 77 ppmv NO2 a change of −40% for a current-biased element at 873 K and 7 vol% O2. The elements display an [O2] sensitivity that is a decreasing function of [NOx] and their DC electrical resistance varies exponentially with temperature. These sensing elements could find application in sensors for measuring [NOx] at temperatures near 900 K.