Electrical conductivity of yttrium oxide

Journal Article · Tue Jul 01 04:00:00 EDT 1975 · Inorg. Mater. (USSR) (Engl. Transl.); (United States)

OSTI ID:7361641

Dubok, V A; Lashneva, V V

The electric conductivity of monocrystalline and polycrystalline Y/sub 2/O/sub 3/ was investigated. It was found that, the electric conductivity of yttrium oxide does not depend on the number of intercrystallite boundaries in the specimen, the crystal thickness, or small changes in the porosity and the frequency at which the electric conductivity is measured. However, doping Y/sub 2/O/sub 3/ with 0.01 percent by weight of ZrO/sub 2/ reduces its conductivity at 1300/sup 0/C by approximately one order of magnitude, and under the same conditions incorporation of 0.15 percent by weight of CaO increases the conductivity of Y/sub 2/O/sub 3/ by two orders of magnitude. The mechanism of the impurity effect varies with the content of oxygen in equilibrium with the oxide of the gas phase. The transition from ion defects to electron defects is promoted by an increase in p/sub O//sub 2/ for solid solutions with calcium oxide, and by a decrease in p/sub O//sub 2/ for solid solutions with zirconium dioxide.

• Research Organization: Inst. of Problems in Materials Science, Kiev
• OSTI ID: 7361641
• Journal Information: Inorg. Mater. (USSR) (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (USSR) (Engl. Transl.); (United States) Vol. 11:7; ISSN INOMA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ADDITIVES
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CRYSTAL DOPING
CRYSTAL STRUCTURE
DEFECTS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GRAIN BOUNDARIES
IMPURITIES
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES