Study of the defect structure of ''pure'' and doped nonstoichiometric CeO/sub 2/. Final report, January 1, 1965--May 31, 1977

Technical Report · Tue Nov 01 04:00:00 EST 1977

DOI:https://doi.org/10.2172/5283018· OSTI ID:5283018

Blumenthal, R N

The defect structure and transport properties of defects in nonstoichiometric oxides was studied based on their electrical and thermodynamic behavior. Similar studies were also made on doped-nonstoichiometric oxides to determine the effect of the ionic radii, valence and concentration of the dopant cation on the nonstoichiometric defect structure and the transport properties of these defects. The thermodynamic and electrical property study on ''pure'' and doped-nonstoichiometric CeO/sub 2//sub -x/ is reviewed. The combined study of the electrical conductivity, ionic transference, and thermodynamic measurements initiated on CaO-doped CeO/sub 2/ as a function of temperature, oxygen pressure and CaO content is discussed. The results of similar measurements on CeO/sub 2/ doped with other oxides (e.g., ThO/sub 2/, Ta/sub 2/O/sub 5/, etc.) which have cations with different valences and ionic radii are also discussed. The primary objective of these studies was to determine the effect of ionic radii, valence and concentration of the dopant cation on (1) the nonstoichiometric behavior, (2) the thermodynamic quantities ..delta..antiH/sub O/sub 2// and ..delta..antiS/sub O/sub 2//, (3) the nonstoichiometric defect structure, (4) the electronic and ionic conductivities, and (5) the mobility of electrons and oxygen vacancies in doped CeO/sub 2//sub -x/.

• Research Organization: Marquette Univ., Milwaukee, Wis. (USA). Coll. of Engineering
• DOE Contract Number: EY-76-S-02-1441
• OSTI ID: 5283018
• Report Number(s): COO-1441-28
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTINIDE COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
IMPURITIES
IONIC CONDUCTIVITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
TANTALUM COMPOUNDS
TANTALUM OXIDES
THERMODYNAMIC PROPERTIES
THORIUM COMPOUNDS
THORIUM OXIDES
TRANSITION ELEMENT COMPOUNDS