Schott Ag

Steffen Grün

Johann Faderl

Thomas Lifka

Olaf Claußen

Simone Monika Ritter

Silke Wolff

Ralf Jedamzik

André Schrepfer

Karl Mannemann

A method for producing a glass ceramic includes: providing a batch of raw materials; heating the batch of raw materials until a melt is obtained, the batch of raw materials being heated at least in a plurality of sections to a temperature above T3 which corresponds to a viscosity of a molten glass of 10dPa*s; refining the melt, the melt being heated at least in a plurality of sections to a temperature above T2.5 which corresponds to a viscosity of the molten glass of 10dPa*s; obtaining a refined glass which is configured for being ceramized to form a glass ceramic material; and ceramizing a glass which is configured for being ceramized to form the glass ceramic material, at least one of the step of heating until the melt is obtained and the step of refining being performed with heating by way of Hand Ocombustion.

Glass ceramic and method for producing a glass ceramic

A method for melting and/or refining glass, glass ceramic or glass which can be ceramized to form glass ceramic includes: providing a batch of raw materials; heating the batch until a melt of molten glass is obtained, the batch being heated at least in sections to a temperature above T3 which corresponds to a viscosity of the molten glass of 10dPa*s; refining the melt, the melt being heated at least in sections to a temperature above T2.5 which corresponds to a viscosity of the molten glass of 10dPa*s, refining of the melt includes adjusting an oxygen partial pressure p(O) which is reduced by at least 60% relative to an Osaturation in the melt at temperature T3; and obtaining a re-fined glass, a refined glass ceramic or a refined glass which can be ceramized to form glass ceramic.

Glass or glass ceramic as well as method for melting and refining glass or glass ceramic

A glass-ceramic component is provided that has a low average coefficient of thermal expansion (CTE) and a high CTE homogeneity. The use of such a component and a process for producing such a component are also provided.

Highly homogeneous glass-ceramic component

A borosilicate glass, having a spectral edge wavelength in a UV range of 280 to 325 nm, which can be set in a simple and defined manner, with the composition in percent by weight on an oxide basis of 60&#x2013;75% SiO, 10&#x2013;15% BO, 5&#x2013;15% NaO, 5&#x2013;10% KO, 0&#x2013;5% LiO, 0.1&#x2013;1 CaO, 0.5&#x2013;3% BaO, &#x3e;0&#x2013;1.7% TiO, 0&#x2013;0.5% SbO, and normal refining agents.

Colorless glasses/borosilicate glasses with special UV-edge

The invention relates to a meltdown device for the production of high-UV transmittive glass types, comprising The heating arrangement comprises heating elements, in particular electrodes that are arranged on the melt tank in the zone of the melt bath, as well as an agitating arrangement for stirring of the melt bath and uniform intermixing and sub-mixing into the melt of material from the mixture lying on the melt surface.

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Wallhausen, Germany

Steffen Grün