Use of LaSrCrO in high-temperature NO sensing elements
| Autor: | Timothy R. Armstrong, Frederick C. Montgomery, David L. West |
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| Rok vydání: | 2005 |
| Předmět: |
Fabrication
Inorganic chemistry Metals and Alloys Oxide Analytical chemistry Electrolyte Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Phase (matter) Decreased Sensitivity Electrode Materials Chemistry Electrical and Electronic Engineering Instrumentation NOx |
| Zdroj: | Sensors and Actuators B: Chemical. 106:758-765 |
| ISSN: | 0925-4005 |
| Popis: | This work focuses on use of the electronically-conducting oxide La 0.85 Sr 0.15 CrO 3 (LSC) in solid electrolyte-based NO x sensing elements intended for operation at T ∼650 °C. Two different investigations are described, in the first LSC was used as a direct substitute for Pt. The substitution led to decreased sensitivity to NO 2 and an enhancement of the NO response, although the NO 2 response was still much larger in magnitude and opposite in sign. Fabrication and evaluation of sensing elements with co-planar LSC and Pt electrodes comprised the second investigation. The measured NO x sensing performance of these elements was commensurate with that of the elements fabricated in the first phase of the investigation (e.g., 450 ppm v NO 2 in 7 vol% O 2 produced ∼50 mV at 600 °C) and the response/recovery times for NO 2 sensing were improved. The results indicate that LSC could be useful in these types of sensing elements, both as a substitute for, and in combination with, Pt. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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