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Title: Solid state oxygen sensor

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.
Inventors:
 [1];  [2];  [2];  [2]
  1. (Sante Fe, NM)
  2. (Los Alamos, NM)
Issue Date:
OSTI Identifier:
870541
Assignee:
Regents of University of California, Office of Technology (Alameda, CA) LANL
Patent Number(s):
US 5543025
Contract Number:
W-7405-ENG-36
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
Language:
English
Subject:
solid; oxygen; sensor; sensors; provided; yttria-doped; zirconia; electrolyte; electrochemical; pumping; linear; relationship; concentration; voltage; arising; current; plateau; occurs; accessing; limited; diffusion; barrier; formed; mixed; electronic; ion-conducting; membrane; lanthanum-containing; perovskite; zirconia-containing; fluorite; heater; maintain; adequate; coefficient; conducting; layer; mixed conducting; diffusion coefficient; oxygen sensor; conducting layer; oxygen concentration; diffusion barrier; zirconia electrolyte; oxygen pump; oxygen ion-conducting; oxygen diffusion; chemical oxygen; oxygen sensors; conducting membrane; /204/