Ionic conductivity and Raman spectra of Na--Li, K--Li, and K--Sn ß-Al₂O/sub 3

Conference · Mon Jan 01 04:00:00 EST 1979

OSTI ID:6262328

Kaneda, T.; Bates, J. B.; Wang, J. C.; Engstrom, H.

The ionic conductivity and Raman spectra of Na, Na--Li, K, K--Li, and K--Sn ..beta..-Al/sub 2/O/sub 3/ were measured in order to understand the mechanisms of mixed-ion conduction. It was observed that at 300/sup 0/K, for example, the conductivity of a crystal with composition Na/sub 0/./sub 82/Li/sub 0/./sub 18/..beta..-Al/sub 2/O/sub 3/ was about one-fifth that of pure Na cyrstals, while the conductivity of K/sub 0/./sub 80/Li/sub 0/./sub 20/..beta..-Al/sub 2/O/sub 3/ was more than three orders of magnitude lower than that of pure K compounds. The results of a model calculation indicated that the Li/sup +/ ions are the main carrier species in the Na--Li and K--Li mixed compounds. Features observed in the Raman spectra were attributed to paired- and single-ion vibrations. It is concluded that the K/sup +/ ions which contribute to a band at 69 cm/sup -1/ in K ..beta..-Al/sub 2/O/sub 3/ are the effective carriers for conduction.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6262328
• Report Number(s): CONF-790538--7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METALS
ALLOYS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
IONIC CONDUCTIVITY
LITHIUM
LITHIUM ALLOYS
METALLURGICAL EFFECTS
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POTASSIUM
POTASSIUM ALLOYS
RAMAN SPECTRA
SODIUM
SODIUM ALLOYS
SPECTRA
TIN ALLOYS