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Electrodes for solid state gas sensor

United States Patent

August 12, 2003
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Carbon Monoxide Sensor
Solid State Gas Sensors
A mixed potential electrochemical sensor for the detection of gases has a ceria-based electrolyte with a surface for exposing to the gases to be detected, and with a reference wire electrode and a sensing wire electrode extending through the surface and fixed within the electrolyte as the electrolyte is compressed and sintered. The electrochemical sensor is formed by placing a wire reference electrode and a wire sensing electrode in a die, where each electrode has a first compressed planar section and a second section depending from the first section with the second section of each electrode extending axially within the die. The die is filled with an oxide-electrolyte powder and the powder is pressed within the die with the wire electrodes. The wire-electrodes and the pressed oxide-electrolyte powder are sintered to form a ceramic electrolyte base with a reference wire electrode and a sensing wire electrode depending therefrom.
Mukundan; Rangachary (Santa Fe, NM), Brosha; Eric L. (Los Alamos, NM), Garzon; Fernando (Santa Fe, NM)
The Regents of the University of California (Los Alamos, NM)
10/ 175,252
June 18, 2002
STATEMENT REGARDING FEDERAL RIGHTS This invention was made with government support under Contract No. W7405-ENG-36 awarded by the U.S. Department of Energy. The government has certain rights in the invention.