Solid state oxygen sensor

Patent · Sun Dec 31 23:00:00 EST 1995

OSTI ID:870541

Garzon, Fernando H ^[1]; Chung, Brandon W ^[2]; Raistrick, Ian D ^[2]; Brosha, Eric L ^[2]

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1. Sante Fe, NM
2. Los Alamos, NM

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.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM
• DOE Contract Number: W-7405-ENG-36
• Assignee: Regents of University of California, Office of Technology (Alameda, CA)
• Patent Number(s): US 5543025
• OSTI ID: 870541
• Country of Publication: United States
• Language: English

Related Subjects

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accessing
adequate
arising
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chemical oxygen
coefficient
concentration
conducting
conducting layer
conducting membrane
current
diffusion
diffusion barrier
diffusion coefficient
electrochemical
electrolyte
electronic
fluorite
formed
heater
ion-conducting
lanthanum-containing
layer
limited
linear
maintain
membrane
mixed
mixed conducting
occurs
oxygen
oxygen concentration
oxygen diffusion
oxygen ion-conducting
oxygen pump
oxygen sensor
oxygen sensors
perovskite
plateau
provided
pumping
relationship
sensor
sensors
solid
voltage
yttria-doped
zirconia
zirconia electrolyte
zirconia-containing