Substrates coated with aluminum oxide solutions

Details Substrates coated with aluminum oxide solutions Substrates coated with aluminum oxide solutions

1982-10-13

1984-08-14

Page, Thurman K.

Stock material or miscellaneous articles

Composite

Of quartz or glass

427162, 427163, 427165, 427169, 4273722, 428702, B32B 1500, B05D 302

Patent

active

044657390

ABSTRACT:
Disclosed is a method of preparing a clear partially hydrolyzed aluminum alkoxide solution by mixing an aluminum alkoxide with about 0.4 to about 1 moles of water per mole of aluminum alkoxide in the presence of sufficient alcohol to give a maximum weight percent of equivalent alumina of 10%. The mixture is then heated until clear, which typically requires a temperature of about 40.degree. to about 60.degree. C. Then sufficient additional water is added to bring the number of moles of water per mole of alkoxide up to at least about 2. The water is added in the presence of sufficient alcohol to give a maximum weight percent of equivalent alumina of about 3%. A polymerized alumina glass can be prepared from the composition by heating it to a temperature of at least 500.degree. C.

REFERENCES:
patent: 4272588 (1981-06-01), Yoldas et al.
patent: 4361598 (1982-11-01), Yoldas

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