Schott Ag

Schott Glas

Other

Barberini Gmbh

Manfred Borens

Franz-Peter Eckes

Stefano Merolla

Helmut Schoppe

Andreas Stolzenberg

Robert Ruehl

Karsten Von Westernhagen

Stefen Bauer

Stefan Friedrich Melchior

Michael Spallek

Marten Walther

Jochen Heinz

Stefan Bauer

Joerg Witte

Markus Kuhr

Wolfgang Moehl

Joachim Kuester

Martin Sommer

Stefan Postrach

Wolfgang Möhl

Artur Fabian

Karsten V Westernhagen

Stefan Freidrich Melchior

Jorq Witte

Marcus Holla

Janus Zborowski

Gerald Wasem

To provide a material for use at high temperatures of several 100&#xb0; C. which is simple and quick to produce, the invention provides a composite having a layer structure and a process for producing it, which comprises the following steps:

Layer material for high-temperature use

A process is disclosed for simple and rapid production of a shaped body comprising fused silica and a shaped body which leads to virtually no contamination of a melt in contact with the shaped body even at high temperatures. The disclosed process comprises the steps of: a) provision of fused silica in the form of essentially amorphous SiOgrains of which not more than 5% have a diameter greater than 15 mm, b) addition of water to the fused silica grains to produce a slip, c) casting of the slip into a mold which comprises a hollow body having the inverse shape of the shaped body to be produced, and d) drying of the slip to give an intermediate body, which is then sintered and cooled. A shaped body producible in accordance with the aforementioned process is also disclosed, which comprises at least 99.0 mol % of SiO.

[object Object]

The method provides an improved quartz glass body, especially an improved quartz glass crucible for melting non-metals, non-ferrous metals, or silicon. The quartz glass body is made by a method in which a quartz glass-water mixture is supplied to a gypsum casting mold comprising an outer part and an inner part, dried in the gypsum mold, and put under an overpressure via a system of ducts in the form of textile tubes embedded in the mold during the drying. Later a resulting green glass body is removed from the mold. At least a portion of the shaping surfaces of the inner part of the gypsum mold are surfaces of a water-impermeable substance. The method provides a cast body with a reduced tendency to crack and with a smaller open porosity.

Method and casting mold for manufacturing a quartz glass body

A method for producing permanent integral connections of oxide-dispersed metallic materials by welding. The materials or components to be connected are overlapped to form an overlapping region in a joining region of the overlapping region. The materials or components are heated below the melting temperatures of the materials and are welded to at least partially form a diffusion bond by a welding method. A noble metal foil may be between the components to be connected. The diffusion bond is heated subsequently to a temperature below the melting temperature of the materials or components and the bond is mechanically recompacted by hammering.

Method for producing permanent integral connections of oxide-dispersed (ODS) metallic materials or components of oxide-dispersed (ODS) metallic materials by welding

The container is a glass bottle () encased with a plastic coating () from its base section () to a sealing rim () around its mouth (M) in order to protect against shattering or explosive failure. The glass bottle, preferably a glass inlet, is fillable under pressure with a sprayable medically active substance and a propellant and provided with a delivery element attached to the sealing rim. To facilitate lower injection molding temperatures and pressures and to permit autoclaving at high temperatures the glass bottle with the plastic coating () is made by a method which includes injecting at least one reactively cross-linkable plastic capable of being heat-softened into a mold surrounding the glass bottle and forming the plastic coating () by a reaction injection molding (RIM) method.

Closeable glass container comprising a plastic coating applied by injection molding and method for the production thereof

This invention relates to optical, preferably ophthalmic lenses with a body made of plastic, in particular for spectacle glasses, and the plastic incorporates cycloolefinic polymers and the plastic body is coated with a transparent coating resistant to corrosion. Another object of this invention is a process for the production of these lenses. The lenses according to the invention are especially resistant to greases, sweat and/or solvents.

Ophthalmic lens and process for its production

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Mainz, Germany

Manfred Borens