Preparation and characterization of lithium aluminate
Journal Article
·
· Mater. Res. Bull.; (United States)
The synthesis of LiAlO/sub 2/ by reaction of alumina with mixtures of alkali carbonates or with alkali hydroxides was studied. At 600 to 700/sup 0/C, ..cap alpha..-LiAlO/sub 2/ was the major allotropic phase produced by the reaction of ..gamma..-Al/sub 2/O/sub 3/ with mixtures of Li/sub 2/CO/sub 3/ and K/sub 2/CO/sub 3/. Reaction of LiOH (or mixtures of LiOH and KOH) with ..gamma..-Al/sub 2/O/sub 3/ at 450/sup 0/C produced only ..beta..-LiAlO/sub 2/ while reaction of LiOH with ..cap alpha..-Al/sub 2/O/sub 3/ at 450/sup 0/C produced mainly ..gamma..-LiAlO/sub 2/. The major product of the reaction with LiOH at 600/sup 0/C was ..gamma..-LiAlO/sub 2/, regardless of the Al/sub 2/O/sub 3/ allotrope used. The ..cap alpha..- and ..beta..-LiAlO/sub 2/ powders were observed by scanning electron microscopy to have three distinguishable particle morphologies, which were classified as clumps, platelets and rods. Both ..cap alpha..-LiAlO/sub 2/ and ..beta..-LiAlO/sub 2/ particles were produced in the form of clumps and platelets while ..beta..-LiAlO/sub 2/ particles were also produced in the form of rods. The study was undertaken in an attempt to prepare LiAlO/sub 2/ that can be used as an electrolyte matrix in molten carbonate fuel cells.
- Research Organization:
- Argonne National Lab., IL
- OSTI ID:
- 6520198
- Journal Information:
- Mater. Res. Bull.; (United States), Journal Name: Mater. Res. Bull.; (United States) Vol. 13:5; ISSN MRBUA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
30 DIRECT ENERGY CONVERSION
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
ALUMINATES
ALUMINIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CERAMICS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELECTRON MICROSCOPY
FUEL CELLS
HIGH-TEMPERATURE FUEL CELLS
LITHIUM COMPOUNDS
MATRIX MATERIALS
MICROSCOPY
MICROSTRUCTURE
MOLTEN SALTS
MORPHOLOGY
OXYGEN COMPOUNDS
POWDERS
PRODUCTION
REACTOR MATERIALS
SALTS
SYNTHESIS
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
ALUMINATES
ALUMINIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CERAMICS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELECTRON MICROSCOPY
FUEL CELLS
HIGH-TEMPERATURE FUEL CELLS
LITHIUM COMPOUNDS
MATRIX MATERIALS
MICROSCOPY
MICROSTRUCTURE
MOLTEN SALTS
MORPHOLOGY
OXYGEN COMPOUNDS
POWDERS
PRODUCTION
REACTOR MATERIALS
SALTS
SYNTHESIS