Schott Ag

Daniela Seiler

Bernd Hoppe

Martin Letz

Evelin Weiss

Andreas Roters

Michael Kluge

Bernd Ruedinger

Martin Spier

Bianca Schreder

Ina Mitra

Mark J Davis

Maria-Louisa Reich

Maria-Louisa Aigner

Kathrin Schellenberg

Katrin Schellenberg

Stephan Knoener

Martina Dressler

Hubertus Braun

A product is provided that includes a volume-colored monolithic glass or glass ceramic element and to a method for producing same. The glass or glass ceramic element has a first region in which the coloration is modified so that light transmission of the first region differs from light transmission of a second, adjacent region. The light scattering in the region of modified coloration in the glass or glass ceramic remains the same as light scattering in the second, adjacent region with non-modified light transmission.

Method for modifying the transmission of glasses and glass ceramics and glass or glass ceramic articles that can be produced according to the method

A volume-colored monolithic glass ceramic cooking plate is provided. The plate includes a first zone in which the coloration of the glass ceramic differs from that of a second, adjacent zone, so that an absorption coefficient of the first zone is lower than the absorption coefficient of the second, adjacent zone and so that integral light transmission in the visible spectral range is greater in the first zone than the integral light transmission of the second, adjacent zone. The light scattering in the glass ceramic of the first zone differs from light scattering in the glass ceramic of the second zone by not more than 20 percentage points, preferably by not more than 5 percentage points.

Glass ceramic cooking plate with locally increased transmission and method for producing such a glass ceramic cooking plate

A syringe body/needle assembly is provided that is free of an organic adhesive bond. The assembly includes a syringe body having a nozzle that has an opening; a needle fixed in the syringe body or in the nozzle; and a connecting body made of doped glass. The opening through which the needle is introduced into an interior of the syringe body is hermetically sealed to the needle. The connecting body includes a first material that absorbs more electromagnetic radiation within a wavelength range than a second material from which the syringe body is made.

Syringe body/needle assembly

A syringe body/needle assembly and a method for producing such a syringe body/needle assembly are provided that if free of an organic adhesive bond.

Syringe body/needle assembly and method for producing same

A glass-ceramic having at least two crystal phases, wherein at least one crystal phase has a positive temperature dependence of the resonance frequency &#x3c4;, at least one crystal phase has a negative temperature dependence of the resonance frequency &#x3c4;and the glass-ceramic has a resulting temperature dependence of the resonance frequency &#x3c4;of 0 ppm/K with a maximum deviation of +/&#x2212;20 ppm/K, is described. Furthermore, a process for producing such a glass-ceramic and the use of the glass-ceramic are described.

Glass-ceramic having at least two crystal phases, process for producing a glass-ceramic and its use

A process for the production of a glass-ceramic comprises the following steps:

Glass-ceramic containing nanoscale barium titanate and process for the production thereof

The process of making the glass-ceramic includes ceramicizing a starting glass at a heating or cooling rate during the ceramicization of at least 10 K/min, so that the glass-ceramic contains at least 50% by volume of ferroelectric crystallites with a maximum diameter of from 20 to 100 nm and not more than 10% by volume of nonferroelectric crystallitesis. The glass ceramic produced by the process contains no pores or not more than 0.01% by volume of the pores and a value of e'&#xb7;Vof the glass-ceramic is at least 20 (MV/cm), wherein e&#x2032; is the dielectric constant at 1 kHz and Vis the breakdown voltage per unit thickness. The ferroelectric crystallites preferably have a perovskite structure and are composed of substantially pure or doped BaTiOand/or BaTiO.

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Alzey, Germany

Daniela Seiler