Low temperature limiting-current oxygen sensors based on tetragonal zirconia polycrystals

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2085998· OSTI ID:7068143

Liaw, B Y; Weppner, W ^[1]

---

1. Max-Planck Inst. fur Festkorperforschung, D-7000 Stuttgart 80 (DE)

This paper reports that yttria doped tetragonal zirconia polycrystals can overcome the phase transition into the monoclinic phase at about 500{degrees} C and show higher ionic conductivities than cubic stabilized zirconia in spite of the lower defect concentration. This material is applied in oxygen gas sensors under limiting current conditions at intermediate and ambient temperatures. AC and dc conductivities, Tafel behavior, minority charge carrier diffusivity, and the i-V characteristics are reported. The detection limit of the oxygen partial pressure and the response time depend on the thickness of the electrolyte and are related to the oxygen ion conductance and the electronic mobilities, respectively. The sensors may be optimized by the application of thin film electrolytes and of modified configurations with solid oxide bulk conducting diffusion barriers.

• OSTI ID: 7068143
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 138:8; ISSN JESOA; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300505 -- Fuel Cells-- Electrochemistry
Mass Transfer & Thermodynamics
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ALLOYS
CARRIER DENSITY
CARRIER MOBILITY
CHALCOGENIDES
CHEMISTRY
CRYSTALS
DIFFUSION BARRIERS
DIMENSIONS
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTROLYTES
ELEMENTS
FILMS
FUEL CELLS
IONIC CONDUCTIVITY
MOBILITY
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHASE STABILITY
PHYSICAL PROPERTIES
POLYCRYSTALS
SOLID ELECTROLYTE FUEL CELLS
STABILITY
THICKNESS
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM ADDITIONS
YTTRIUM ALLOYS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES