Sasol Germany Gmbh

Sasol North America, Inc.

Reiner Glockler

Marcos Schoneborn

Anja Paeger

Jeff Fenton

Holger Mitzel

Steven Baxter

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.

Alpha alumina with high purity and high relative density, a method for its production and its use

The subject matter of the invention is a method for producing composites comprising aluminum oxide and cerium/zirconium mixed oxides, hereinafter referred to briefly as Al/Ce/Zr oxide composite(s) using boehmite and soluble cerium/zirconium salts. Al/Ce/Zr oxide composites produced in this way have an increased thermal stability.

Composites of aluminum oxide and cerium/zirconium mixed oxides

Method for producing composites of aluminum oxide and cerium/zirconium mixed oxides

A composition comprising cement and nano-sized crystalline particles of boehmite alumina or nano-sized crystalline particles of boehmite alumina which have been modified by the inclusion of silicon oxide, calcium oxide, or magnesium oxide. The boehmite alumina has an average crystallite size from about 2 nm to about 80 nm and a content of non-crystalline alumina of less than about 25 mol percent based on total aluminum.

Cement compositions containing nano sized boehmite crystallites

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St. Michaelisdonn, Germany

Reiner Glockler