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Title: Solid state oxygen sensor

A potentiometric oxygen sensor is formed having a logarithmic response to a differential oxygen concentration while operating as a Nernstian-type sensor. Very thin films of mixed conducting oxide materials form electrode services while permitting diffusional oxygen access to the interface between the zirconia electrolyte and the electrode. Diffusion of oxygen through the mixed oxide is not rate-limiting. Metal electrodes are not used so that morphological changes in the electrode structure do not occur during extended operation at elevated temperatures.
Inventors:
 [1];  [2]
  1. (Santa Fe, NM)
  2. (Los Alamos, NM)
Issue Date:
OSTI Identifier:
871266
Assignee:
Regents of Univeristy of California (Alameda, CA) LANL
Patent Number(s):
US 5695624
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; potentiometric; formed; logarithmic; response; differential; concentration; operating; nernstian-type; films; mixed; conducting; oxide; materials; form; electrode; services; permitting; diffusional; access; interface; zirconia; electrolyte; diffusion; rate-limiting; metal; electrodes; morphological; changes; structure; occur; extended; operation; elevated; temperatures; mixed oxide; mixed conducting; oxide materials; oxygen sensor; conducting oxide; oxygen concentration; metal electrode; electrode structure; elevated temperatures; elevated temperature; oxide material; zirconia electrolyte; metal electrodes; form electrode; /204/