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US 12,534,378 B2Granted
Alpha alumina with high purity and high relative density, a method for its production and its use
OwnerReiner Glockler, Holger Mitzelinventors
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Abstract
The present invention relates to an alpha alumina having a high purity, a high density and a low surface area and particularly, to a method to produce such an alpha alumina as well as to the use of the alpha alumina in sapphire production or the production of composite and ceramic bodies.
Claims7
An alpha alumina, wherein said alpha alumina has a purity of at least 99.99%, a relative density above 97%, and a BET surface area of at least 2 m2/g and less than 10 m2/g.
An alpha alumina, wherein said alpha alumina has a purity of at least 99.99%, a relative density above 97%, and a BET surface area of at least 4 m2/g and less than 9 m2/g.
Dependencies are inferred from the claim text.