Complex impedance of electrochemical cells based on yttria doped thoria

Journal Article · Wed Sep 01 04:00:00 EDT 1976 · Mater. Res. Bull.; (United States)

DOI:https://doi.org/10.1016/0025-5408(76)90013-1· OSTI ID:7230837

Schouler, E; Hammou, A; Kleitz, M

In the frequency range 10/sup -2/ to 5.10/sup 5/ Hz and the temperature interval 400 to 1200/sup 0/C, the impedance diagram of a symmetrical cell based on yttria-doped thoria is composed of three semicircles. The influence of the geometrical factor of the thoria samples indicates that the two low-frequency semicircles characterize interface processes. The electrical resistance of the electrolyte is determined by the low frequency intercept of the high frequency semicircle with the real axis. The electronic conductivity of thoria based solid solutions deduced from the variation of this point obeys the law sigma/sub +/ = kP/sub O/sub 2//1/4. Ionic conductivity measured as a function of the oxide vacancy concentration and the relevant activation energies are also reported. An aging process was observed on this material. 7 figures.

• Research Organization: CNRS, Grenoble, France
• OSTI ID: 7230837
• Journal Information: Mater. Res. Bull.; (United States), Journal Name: Mater. Res. Bull.; (United States) Vol. 11:9; ISSN MRBUA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTINIDE COMPOUNDS
AGING
CHALCOGENIDES
CHEMICAL COMPOSITION
ELECTRIC CONDUCTIVITY
ELECTRIC IMPEDANCE
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
IMPEDANCE
IONIC CONDUCTIVITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
TEMPERATURE DEPENDENCE
THORIUM COMPOUNDS
THORIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES