Oxygen ion-conducting ceramics: a new application in high-temperature-high pressure pH sensors

Journal Article · Fri Mar 14 00:00:00 EST 1980 · Science; (United States)

OSTI ID:5214449

Membrane electrodes fabricated from yttria-stabilized zirconia, a representative oxygen ion-conducting ceramic, show a linear voltage response to pH over the range 3 to 8 at 285/sup 0/C and a pressure of 1200 pounds per square inch (82 atmospheres). Test units have been operated continuously at 285/sup 0/C without failure for periods as long as 9 days. Unlike sensors which are based on electron transfer couples, such membrane electrodes are insensitive to changes in the oxidation-reduction environment and, in turn, exert no influence upon the environment. Such ceramic membranes can therefore be used for the direct measurement of the pH of geothermal brines, of water in nuclear reactors, and in high-temperature thermodynamic studies on aqueous systems.

• OSTI ID: 5214449
• Journal Information: Science; (United States), Vol. 207
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
15 GEOTHERMAL ENERGY
22 GENERAL STUDIES OF NUCLEAR REACTORS
COOLANTS
PH VALUE
GEOTHERMAL FLUIDS
MONITORING
YTTRIUM OXIDES
MEASURING INSTRUMENTS
ZIRCONIUM OXIDES
BRINES
ELECTRODES
MEMBRANES
CHALCOGENIDES
FLUIDS
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
440300* - Miscellaneous Instruments- (-1989)
150302 - Geothermal Exploration & Exploration Technology- Geochemical Techniques & Surveys
220200 - Nuclear Reactor Technology- Components & Accessories