High-T NOx Sensing Elements Using Conductive Oxides and Pt

David L. West; Fred C. Montgomery; Timothy R. Armstrong

doi:10.1115/ICEF2004-854

High-T NO_x Sensing Elements Using Conductive Oxides and Pt

David L. West, Fred C. Montgomery, Timothy R. Armstrong

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Development of NO_x sensing elements intended for operation at T ~600 °C are described. The elements were fabricated by depositing co-planar La_1-xSr_xBO₃ (B = Cr, Fe) and Pt electrodes on yttria-stabilized zirconia substrates. Characterization of the elements included response to NO₂ and NO as well as the [O2] dependence of the NO₂ response. Much stronger (~40 mV for 450 ppm NO₂ in 7 vol% O₂ at 600 °C) sensing responses were observed for N0₂ than NO, indicating these elements are best suited for detection of NO₂. Pronounced asymmetries were observed between the NO₂ step response and recovery times for the elements, with temperature being the primary variable governing the recovery times in the temperature range 500-700 °C.

Original language	English
Title of host publication	ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004
Publisher	American Society of Mechanical Engineers (ASME)
Pages	29-33
Number of pages	5
ISBN (Electronic)	0791837467, 9780791837467
DOIs	https://doi.org/10.1115/ICEF2004-854
State	Published - 2004
Event	ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004 - Long Beach, United States Duration: Oct 24 2004 → Oct 27 2004

Publication series

Name	ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004

Conference

Conference	ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004
Country/Territory	United States
City	Long Beach
Period	10/24/04 → 10/27/04

Funding

The authors wish to thank C. Walls for fabricating the YSZ substrates, B. Armstrong for formulating and producing the screen-printing inks, and D. Kubinski and R. Soltis of Ford Research Laboratories (Dearborn, MI) for consultation in automotive sensing techniques. Oak Ridge National Laboratory is operated by UT-Battelle, LLC for the U. S. Department of Energy under contract DE-AC05-00OR22725. This work is supported by the FreedomCar and ARES projects within the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy.

Access to Document

10.1115/ICEF2004-854

Cite this

West, D. L., Montgomery, F. C., & Armstrong, T. R. (2004). High-T NO_x Sensing Elements Using Conductive Oxides and Pt. In ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004 (pp. 29-33). (ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/ICEF2004-854

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title = "High-T NOx Sensing Elements Using Conductive Oxides and Pt",

abstract = "Development of NOx sensing elements intended for operation at T ~600 °C are described. The elements were fabricated by depositing co-planar La1-xSrxBO3 (B = Cr, Fe) and Pt electrodes on yttria-stabilized zirconia substrates. Characterization of the elements included response to NO2 and NO as well as the [O2] dependence of the NO2 response. Much stronger (~40 mV for 450 ppm NO2 in 7 vol% O2 at 600 °C) sensing responses were observed for N02 than NO, indicating these elements are best suited for detection of NO2. Pronounced asymmetries were observed between the NO2 step response and recovery times for the elements, with temperature being the primary variable governing the recovery times in the temperature range 500-700 °C.",

author = "West, {David L.} and Montgomery, {Fred C.} and Armstrong, {Timothy R.}",

note = "Publisher Copyright: {\textcopyright} 2004 by ASME.; ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004 ; Conference date: 24-10-2004 Through 27-10-2004",

year = "2004",

doi = "10.1115/ICEF2004-854",

language = "English",

series = "ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004",

publisher = "American Society of Mechanical Engineers (ASME)",

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West, DL , Montgomery, FC & Armstrong, TR 2004, High-T NO_x Sensing Elements Using Conductive Oxides and Pt. in ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004. ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004, American Society of Mechanical Engineers (ASME), pp. 29-33, ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004, Long Beach, United States, 10/24/04. https://doi.org/10.1115/ICEF2004-854

High-T NO_x Sensing Elements Using Conductive Oxides and Pt. / West, David L.; Montgomery, Fred C.; Armstrong, Timothy R.
ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004. American Society of Mechanical Engineers (ASME), 2004. p. 29-33 (ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - Development of NOx sensing elements intended for operation at T ~600 °C are described. The elements were fabricated by depositing co-planar La1-xSrxBO3 (B = Cr, Fe) and Pt electrodes on yttria-stabilized zirconia substrates. Characterization of the elements included response to NO2 and NO as well as the [O2] dependence of the NO2 response. Much stronger (~40 mV for 450 ppm NO2 in 7 vol% O2 at 600 °C) sensing responses were observed for N02 than NO, indicating these elements are best suited for detection of NO2. Pronounced asymmetries were observed between the NO2 step response and recovery times for the elements, with temperature being the primary variable governing the recovery times in the temperature range 500-700 °C.

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