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Development of High Temperature Gas Sensor TechnologyThe measurement of engine emissions is important for their monitoring and control. However, the ability to measure these emissions in-situ is limited. We are developing a family of high temperature gas sensors which are intended to operate in harsh environments such as those in an engine. The development of these sensors is based on progress in two types of technology: (1) The development of SiC-based semiconductor technology; and (2) Improvements in micromachining and microfabrication technology. These technologies are being used to develop point-contact sensors to measure gases which are important in emission control especially hydrogen, hydrocarbons, nitrogen oxides, and oxygen. The purpose of this paper is to discuss the development of this point-contact sensor technology. The detection of each type of gas involves its own challenges in the fields of materials science and fabrication technology. Of particular importance is sensor sensitivity, selectivity, and stability in long-term, high temperature operation. An overview is presented of each sensor type with an evaluation of its stage of development. It is concluded that this technology has significant potential for use in engine applications but further development is necessary.
Document ID
19970025152
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hunter, Gary W. (NASA Lewis Research Center Cleveland, OH United States)
Chen, Liang-Yu (NASA Lewis Research Center Cleveland, OH United States)
Neudeck, Philip G. (NASA Lewis Research Center Cleveland, OH United States)
Knight, Dak (Cortez 3 Service Corp. Cleveland, OH United States)
Liu, Chung-Chiun (Case Western Reserve Univ. Cleveland, OH United States)
Wu, Quing-Hai (Case Western Reserve Univ. Cleveland, OH United States)
Zhou, Huan-Jun (Case Western Reserve Univ. Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1997
Subject Category
Instrumentation And Photography
Report/Patent Number
NAS 1.15:107442
NASA-TM-107442
E-10710
Report Number: NAS 1.15:107442
Report Number: NASA-TM-107442
Report Number: E-10710
Meeting Information
Meeting: Turbo-Expo 1997
Location: Orlando, FL
Country: United States
Start Date: June 2, 1997
End Date: June 5, 1997
Accession Number
97N24775
Funding Number(s)
PROJECT: RTOP 242-20-06
CONTRACT_GRANT: NAS3-24816
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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