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Title: Oxygen partial pressure sensor

A method for detecting oxygen partial pressure and an oxygen partial pressure sensor are provided. The method for measuring oxygen partial pressure includes contacting oxygen to a solid oxide electrolyte and measuring the subsequent change in electrical conductivity of the solid oxide electrolyte. A solid oxide electrolyte is utilized that contacts both a porous electrode and a nonporous electrode. The electrical conductivity of the solid oxide electrolyte is affected when oxygen from an exhaust stream permeates through the porous electrode to establish an equilibrium of oxygen anions in the electrolyte, thereby displacing electrons throughout the electrolyte to form an electron gradient. By adapting the two electrodes to sense a voltage potential between them, the change in electrolyte conductivity due to oxygen presence can be measured.
  1. (Downers Grove, IL)
Issue Date:
OSTI Identifier:
United States of America as represented by United States (Washington, DC) ANL
Patent Number(s):
US 5344549
Contract Number:
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
oxygen; partial; pressure; sensor; method; detecting; provided; measuring; contacting; solid; oxide; electrolyte; subsequent; change; electrical; conductivity; utilized; contacts; porous; electrode; nonporous; affected; exhaust; stream; permeates; establish; equilibrium; anions; displacing; electrons; throughout; form; electron; gradient; adapting; electrodes; sense; voltage; potential; due; presence; measured; voltage potential; exhaust stream; oxygen partial; solid oxide; electrical conductivity; partial pressure; oxide electrolyte; pressure sensor; porous electrode; oxygen anion; /204/