Plasma-sprayed layers of aluminium oxide
AssigneeEvonik Degussa GmbH
InventorsYi Deng, Monika Oswald, Klaus Deller, Rolf Clasen, Georg Fehringer
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Abstract
Plasma-sprayed layers of aluminium oxide on a substrate are produced by using a pyrogenically produced aluminium oxide, for example selected from the group consisting of borosilicate and steel, as starting powder.
Claims4
A layered substrate comprising plasma-sprayed layers of aluminium oxide, wherein the particles of the aluminium oxide in the layer have a size of from 20 to 30 nm (nanometers) and are predominantly in the α-Al2O3-phase, and are obtained from granular aluminium oxide produced from a spray dried aqueous dispersion of pyrogenically produced aluminium oxide having a mean particle diameter of from 5.0 to 150 μm and a tapped density of from 300 to 1,200 g/l.
Dependencies are inferred from the claim text.