Heraeus Quarzglas Gmbh & Co Kg

Heraeus Quartz America LLC

Dirk Michel

Christian Neumann

Christian Schenk

Gerrit Scheich

Ashur J Atanos

Nadine Tscholitsch

Frank Wessely

Stephan Moritz

In a known composite material with a fused silica matrix there are regions of silicon-containing phase embedded. In order to provide a composite material which is suitable for producing components for use in high-temperature processes for heat treatment even when exacting requirements are imposed on impermeability to gas and on purity, it is proposed in accordance with the invention that the composite material be impervious to gas, have a closed porosity of less than 0.5% and a specific density of at least 2.19 g/cm, and at a temperature of 1000&#xb0; C. have a spectral emissivity of at least 0.7 for wavelengths between 2 and 8 &#x3bc;m.

Composite material, heat-absorbing component, and method for producing the composite material

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Munich, Georgia

Dirk Michel