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Solid state oxygen sensor

United States Patent

*** EXPIRED ***
5,543,025
August 6, 1996
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Sulfur Resistant Electrodes for Zirconia Oxygen Sensors
Solid State Gas Sensors
Solid state oxygen sensors are provided with a yttria-doped zirconia as an electrolyte and use the electrochemical oxygen pumping of the zirconia electrolyte. A linear relationship between oxygen concentration and the voltage arising at a current plateau occurs when oxygen accessing the electrolyte is limited by a diffusion barrier. A diffusion barrier is formed herein with a mixed electronic and oxygen ion-conducting membrane of lanthanum-containing perovskite or zirconia-containing fluorite. A heater may be used to maintain an adequate oxygen diffusion coefficient in the mixed conducting layer.
Garzon; Fernando H. (Sante Fe, NM), Chung; Brandon W. (Los Alamos, NM), Raistrick; Ian D. (Los Alamos, NM), Brosha; Eric L. (Los Alamos, NM)
The Regents of the University of California, Office of Technology (Alameda, CA)
08/ 381,609
January 30, 1995
This invention was made with government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy. The government has certain rights in the invention.