Mobility of cations in magnesium aluminate spinel

Journal Article · Tue Apr 15 04:00:00 EST 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.33.5698· OSTI ID:5956393

Martinelli, J R; Sonder, E; Weeks, R A; Zuhr, R A

Transport of cations in magnesium aluminate spinel due to an applied electric field at approximately 1000 /sup 0/C has been measured by observing changes in elemental concentrations near the cathode and anode surfaces using ion backscattering techniques. The results indicate that magnesium ions are the mobile species at 1000 /sup 0/C and that these ions combine with ambient oxygen at the cathode surface to form a MgO layer. Quantitative interpretation of the data leads to the conclusion that the ionic transference number of spinel becomes approximately 0.5 after treatment in an electric field.

• Research Organization: Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
• OSTI ID: 5956393
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 33:8; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALKALINE EARTH METAL COMPOUNDS
ALUMINATES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BACKSCATTERING
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
CONTAMINATION
ELECTRODES
ION MOBILITY
IONS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MEASURING METHODS
MINERALS
MOBILITY
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE MOBILITY
SCATTERING
SPINELS
SURFACE CONTAMINATION
VERY HIGH TEMPERATURE