Internal-reference solid-electrolyte oxygen sensor

Journal Article · Sat Oct 01 04:00:00 EDT 1977 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac50020a043· OSTI ID:5280501

Haaland, D M

A new solid-electrolyte oxygen sensor has been developed that eliminates the conventional oxygen reference in previous solid-electrolyte oxygen sensor designs and is, therefore, ideally suited as an insertion device for remote oxygen monitoring applications. It is constructed with two cells of stabilized zirconia sealed into a small unit using a new high-temperature platinum-zirconia seal. One electrochemical cell monitors the ratio of oxygen partial pressures inside and outside the sensor while the other solid-electrolyte cell is used for quantitative electrochemical pumping of oxygen. The internal oxygen reference is generated by initially pumping all oxygen out of the known internal volume of the sensor and then quantitatively pumping oxygen back in until oxygen partial pressures are equal inside and out. This information is used with the ideal gas law to calculate oxygen partial pressures. Tests were conducted from 400 to 1000/sup 0/C in mixtures of oxygen and nitrogen spanning approximately 0.2 to 21 percent oxygen concentration range. Sensors with sputtered platinum and porous platinum paste electrodes were compared.

• Research Organization: Sandia Labs., Albuquerque, NM
• OSTI ID: 5280501
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 49:12; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
CHEMICAL ANALYSIS
CRYOGENIC FLUIDS
ELECTROCHEMICAL CELLS
ELEMENTS
FLUIDS
GASES
MONITORING
NONMETALS
OXYGEN
QUANTITATIVE CHEMICAL ANALYSIS