Sensor for the detection of combustible gases
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United States of America Patent
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Aug 24, 1999
Grant Date -
N/A
app pub date -
Jun 20, 1997
filing date -
Dec 20, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sensor for detecting combustible gases in a test gas. The core of this sensor is comprised of a sensitive layer based on a semiconducting metal oxide that is deposited on a ceramic substrate and for which the electrical resistance provides information on the concentration of combustible gases in a test gas. The sensitive layer (3) is comprised of a compound (12) of sintered-together grains (15) of the semiconducting metal oxide, the surface of which is coated with gold and/or a gold alloy. The semiconducting metal oxide in this case is stannic oxide (SnO.sub.2), indium oxide (In.sub.2 O.sub.3), titanium oxide (TiO.sub.2) or another n-semiconducting metal oxide or metal mix oxide. The gold alloy, for example, is composed of 66 mol % gold and 33 mol % palladium (Pd).
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Patent Citation Ranking
- 16 Citation Count
- G01N Class
- 55.97 % this patent is cited more than
- 26 Age