Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Patent
1976-04-19
1977-10-04
Walton, Donald L.
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
423600, 264 56, 106 734, H01M 618, C04B 3564
Patent
active
040525384
ABSTRACT:
In a preferred embodiment a sintered sodium beta-alumina article is made by forming an aqueous acidic colloidal solution (sol) of a dispersible alpha-alumina monohydrate, adding an aqueous solution of an inorganic oxygen-containing sodium salt to the sol to form a thixotropic gel in which the molar ratio of alumina to sodium oxide is in the range of 5 to 11, spray drying the gel to form a free flowing powder, pressing the powder into an article of predetermined shape, heating the pressed article to drive off volatile material, and then sintering the article at a temperature to form a densified sodium beta-alumina structure. When desired, water soluble oxygen-containing inorganic salts of metals such as lithium or magnesium may be added to the sol to form a modified (doped) sodium beta-alumina composition.
REFERENCES:
patent: 3795723 (1974-03-01), Clendenen
Weiner (I), Research on Electrodes and Electrolytes for the Ford Sodium-Sulfur Battery, National Science Foundation, NSF-C805, July 1975, Annual Report for 6/30/74-6/29/75.
Weiner (II), Research on Electrodes and Electrolyte for the Ford Sodium-Sulfur Battery, National Science Foundation, NSF-C805 Semi-annual report for 6/30/74-12/31/74, Jan. 1975.
Dispol "M" Alumina for Ceramics Continental Oil Co. Bulletin, published by Hammill Gillespie, Inc., N.Y., N.Y.
Eddy David S.
Rhodes James F.
General Motors Corporation
Grove George A.
Walton Donald L.
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