Siemens Aktiengesellschaft

Nora Gerlach

Holger Grote

Christos Georgios Aneziris

Claus Krusch

Friederike Lange

Uwe Klippel

Stefan Schafföner

Harm Speicher

A pressure casting slip for producing a refractory ceramic for use as a heat shield, e.g. in the hot gas path of gas turbine units, includes a particulate mixture of at least two materials having different coefficients of thermal expansion and also organic and/or inorganic binders and floating agents. The particulate mixture has a multimodal particle size distribution divided into 10-20 percent by weight of coarse particles in the size range 1-5 mm in diameter, 10-20 percent by weight of medium particles in the size range 0.5-1 mm in diameter and 60-80 percent by weight of fine particles in the size range up to 0.5 mm in diameter which together make up 100 percent by weight of the particle mixture.

Pressure casting slip and refractory ceramic produced therefrom for gas turbine units

A material composition for producing a fireproof material having a fine-grain fraction with grain sizes of less than 100 &#x3bc;m and a coarse-grain fraction with grain sizes of more than 100 &#x3bc;m is provided. The fine-grain fraction includes aluminum oxide having a weight proportion of at least 90% by wt. in relation to the total weight of the fine-grain fraction, zirconium oxide having a weight proportion of up to 5% by wt. in relation to the total weight of the fine-grain fraction, a stabilizer for the zirconium oxide as well as titanium oxide powder having a weight proportion of up to 5% by wt. in relation to the total weight of the fine-grain fractional. The coarse-grain fraction represents a weight fraction of more than 30% by wt. of the material composition.

Material composition for producing a fireproof material and the use thereof, and fireproof molded body and method for the production thereof

A method for producing a refractory molded boy using a material composition having a fine-grain fraction with grain sizes of less than 100 &#x3bc;m and a coarse-grain fraction with grain sizes of more than 100 &#x3bc;m. The method includes the steps of adding a dispersing agent and/or a liquefier to the material composition unless the material compositing already includes the dispersing agent and/or liquefier, forming the material composition into a molded body, and sintering the molded body at a temperature above 1300 degrees Celsius.

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Freiberg, Germany

Nora Gerlach