Heraeus Quarzglas Gmbh & Co Kg

Thorsten Herbert

Jürgen Weber

Armin Maul

Waltraud Werdecker

Sven Linow

Juergen Weber

Rolf Gerhardt

Stefan Fuchs

Andreas Schreiber

Reinhard Sellner

In a known method for bonding components made of material with a high silicic acid content by means of a substance to substance bond, a SiO-containing bonding mass is formed between connecting surfaces of the components. In order to provide for cost-efficient manufacture of a thermally stable composite, the invention proposes to generate a SiO-containing bonding mass that is generic with regard to the material with a high silicic acid content, comprising the following procedural steps: provision of a slurry containing amorphous SiOparticles; formation of a slurry mass between the connecting surfaces which are fixed in position with regard to each other; drying of the slurry mass; and solidification of the slurry mass by heating under formation of the SiO-containing bonding mass. A component assembly manufactured according to the method of the invention shows high temperature resistance and thermal fatigue resistance and can also be used in contamination-sensitive applications. The component assembly is characterized by an amorphous SiO-containing bonding mass, whose chemical composition is generic with regard to the material with the high silicic acid content of the basic material of the components, whereby the specific density of the SiO-containing bonding mass is at least 2.0 g/cm.

Method for bonding components made of material with a high silicic acid content

In a known component having a reflector layer, the surface of a base body of quartz glass is covered at least in part with a reflector layer. Starting from this, to provide a component, particularly for use in lamp and reflector manufacture, which is equipped with an efficient, chemically and thermally resistant and, nevertheless, inexpensive reflector layer, it is suggested according to the invention that an SiOcover layer should be provided which acts as a diffuse reflector and consists of at least partly opaque quartz glass.

Component with a reflector layer and method for producing the same

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Mömbris, Germany

Thorsten Herbert