Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Schott Ag

Schott Glas

Ezelleron Gmbh

Rolf Clasen

Klaus Deller

Helmut Mangold

Uwe Kolberg

Monika Oswald

Monika Gierke

Jochen Freund

Gerrit Schneider

Yi Deng

Georg Fehringer

Markus Hornfeck

Simone Monika Ritter

Magdalena Winkler-Trudewig

Ruediger Hentschel

Christine Wagner

Monilca Oswald

Sascha Kühn

The invention relates to a method for producing metallic moulded bodies comprising a ceramic layer according to the membrane method, whereby a porous metallic membrane is used. The aim of the invention is to provide a cost-effective, rapid method which is as non-polluting as possible for producing metallic moulded bodies comprising a ceramic layer according to the membrane method using a porous metallic membrane, whereby the penetration depth, the green density and the deposition speed of the ceramic particles in the metallic membrane can be controlled. To this end, the porous metallic membrane is sealed by electrophoretic deposition of ceramic particles in the pores of the metallic membrane, the metallic membrane being arranged between two electrodes for the electrophoretic deposition, and the space between an electrode and the metallic membrane being filled with a dispersion containing the ceramic particles to be deposited in the pores and a dispersant.

Method for producing metallic moulded bodies comprising a ceramic layer, metallic moulded body, and the use of the same

Plasma-sprayed layers of aluminium oxide on a substrate are produced by using a pyrogenically produced aluminium oxide, for example selected from the group consisting of borosilicate and steel, as starting powder.

Plasma-sprayed layers of aluminum oxide

Plasma-sprayed layers of aluminium oxide

The invention concerns an optical colored glass with a composition (in percent by weight based on oxide) of

Optical colored glass, its use, and an optical long-pass cutoff filter

The invention relates to a method for manufacturing optical glasses and colored glasses with the aid of a fluid phase sintering process from a basic material encompassing at least SiO.sub.2 powder as well as additives for reducing the temperature of the fluid phase sintering and/or melting process encompassing the following steps: the starting materials are dissolved in any sequence in a fluid medium to produce a solution as far as is possible and a suspension to the extent that they are not dispersed in solution; a greenbody is produced from the dissolved and dispersed starting materials; the greenbody is dried the dried greenbody is fluid-phase sintered at temperatures below 1200&#xb0; C., in particular in the temperature range from 600&#xb0; C. to 1200&#xb0; C.

Method for manufacturing optical glasses and colored glasses at low temperatures

A layer which is obtained by thermal treatment from an aqueous dispersion applied to a substrate, the dispersion containing silicon/titanium mixed oxide powder prepared by flame hydrolysis. It is prepared by applying a dispersion which contains the silicon/titanium mixed oxide powder to a substrate and then sintering by using a thermal treatment. It can be used, for example, on materials with very low coefficients of expansion.

Layer obtained from an aqueous dispersion containing a silicon/titanium mixed oxide powder prepared by flame-hydrolysis

Aqueous dispersion comprising silicon/titanium mixed oxide powder with a BET surface area of 5 to 500 m/g which has been prepared by flame hydrolysis and has a titanium dioxide content of 0.5 to 20 wt. %, based on the powder, water and at least one pH-regulating substance which can be removed completely from the reaction mixture on heating, the aqueous dispersion having a solids content of between 40 and 80 wt. %. A green body produced therefrom with a green density of between 40 and 85%. A shaped glass article of optical quality with a coefficient of thermal expansion of not more than 0.5&#xd7;10/K produced from the green body.

Dispersion comprising silicon/titanium mixed oxide powder, and green bodies and shaped glass articles produced therefrom

SiO &mdash;TiO glasses having a low coefficient of thermal expansion are produced by a molding being produced that consists of SiO powder, SiO &mdash;TiO powder or TiO powder and that contains by way of secondary component a titanium-containing component which is converted into amorphous TiO .

Process for producing SiO2-TiO2 glasses having a low coefficient of thermal expansion

An optical colored glass with a composition (in percent by weight based on oxide) of SiO 30-75; K O 5-35; TiO 0-5; B O >4-17; ZnO 5-37; F 0.01-10 M M Y 0.1-3, whereby M &equals;Cu , Ag , M &equals;In , Ga , Al , Y &equals;S , Se , Te , as well as the use of this glass as a long-pass cutoff filter.

Growing community of inventors

Saarbrücken, Germany

Rolf Clasen