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Patent
Title
Verfahren zur Herstellung von mit einer poroesen alpha-Al2O3 -Schicht versehenen Substraten, nach dem Verfahren erhaltene Substrate sowie Beschichtungsmittel zur Durchfuehrung des Verfahrens
Other Title
Process for the manufacture of substrates coated with alpha-Al2O3
Abstract
The invention relates to a process for the production of substrates coated with <alpha>-Al<-2 O<-3 by the hydrolytic condensation of aluminium compounds. Hydrolyzable aluminium compounds based on the general formula of AlRR'R'', where R, R' and R'' each mean branched or unbranched alkyl, alkoxyl or acyloxy groups or anions are converted into aluminium/ <beta> diketone compounds before hydrolysis with <beta> diketones of the formula 1 where R->1, R->2 and R->3 mean branched or unbranched alkyl or alkoxyl or hydrogen atoms respectively. The aluminium/ <beta> diketone complex compounds are condensed. The substrates are coated with a colloidal solution of the condensed aluminium/<beta> diketone complex compounds and heated to temperatures of >= 900<degrees Celsius>C
Inventor(s)
Schmidt, H.
Nass, R.
Sporn, D.
Brehler, K.P.
Egger, C.
Patent Number
1990-4016637
Publication Date
1994
Language
German