Method for producing beta-aluminas

Details Method for producing beta-aluminas Method for producing beta-aluminas

1985-10-11

1986-09-09

Doll, John

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

501153, C04B 3510

Patent

active

046108661

ABSTRACT:
A beta and beta"-alumina precursor sol is prepared by controlled hydrolysis of chelated aluminum alkoxide in an alcohol solvent and, subsequently reacting it with a mixture of sodium, magnesium, and lithium alkoxides or acetates or a mixture thereof. The sol thus obtained can be converted into an amorphous transparent gel at low temperatures. This amorphous gel, crystallizes directly into crystalline beta-aluminas at about 1020.degree. C. On heating to about this temperature, crystalline beta and beta"-alumina are formed which are useful as solid electrolyte material in making a sodium-sulfur battery.

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