Schott Glaswerke

Jenaer Glaswerk Schott & Gen.

Helmut Dislich

Paul Hinz

Gerhard Weber

Herwig Scheidler

Nanning J Arfsten

Helmut Schmidt

Gottfried Philipp

Reinhard Kaufmann

Gerhard Tuenker

Gunther Wolf

The invention is related to a glass-ceramic article decorated with a ceramic baking finish. A SiO.sub.2 layer, about 20-200 nm thick, is placed between the decoration and the glass-ceramic material. The SiO.sub.2 layer can additionally contain, to match the refractive index to the refractive index of the glass-ceramic, up to 66.5 wt. % of oxides which change the refractive index, in particular TiO.sub.2, ZrO.sub.2, SnO.sub.2, MgO or Al.sub.2 O.sub.3. In the process to produce the decorated glass ceramic article, the SiO.sub.2 layer is preferably produced according to the known sol-gel process. Preferably, an SiO.sub.2 gel layer, optionally precondensed by a brief thermal treatment, is produced on the still-vitreous article. The decoration is applied to this gel layer and afterward the vitreous article is subjected to ceramization. The SiO.sub.2 -gel layer is converted into an SiO.sub.2 layer, and the ceramic color of the decoration is baked-in. The SiO.sub.2 layer permits, above all, the production of substantially 'halo'-free decorations with sharp contours.

Glass-ceramic article decorated with ceramic color and process for its

The invention is related to a glass-ceramic article decorated with a ceramic baking finish. A SiO.sub.2 layer, about 20-200 nm thick, is placed between the decoration and the glass-ceramic material. The SiO.sub.2 layer can additionally contain, to match the refractive index to the refractive index of the glass-ceramic, up to 66.5 wt % of oxides which change the refractive index, in particular TiO.sub.2, ZrO.sub.2, SnO.sub.2, MgO or Al.sub.2 O.sub.3. In the process to produce the decorated glass ceramic article, the SiO.sub.2 layer is preferably produced according to the known sol-gel process. Preferably, an SiO.sub.2 gel layer, optionally precondensed by a brief thermal treatment, is produced on the still-vitreous article. The decoration is applied to this gel layer and afterward the vitreous article is subjected to ceramization. The SiO.sub.2 -gel layer is converted into an SiO.sub.2 layer, and the ceramic color of the decoration is baked-in. The SiO.sub.2 layer permits, above all, the production of substantially 'halo'-free decorations with sharp contours.

Glass-ceramic article decorated with ceramic color

A pressure vessel sight glass, especially a tempered glass, is protected against the corrosive attack of normally alkaline, boiler feed water heated up to 300.degree. C., by providing the sight glass with a metallic oxide coating consisting essentially of SnO.sub.2, optionally combined with Cr.sub.2 O.sub.3. The coating is preferably applied as a sprayed solution of soluble salt convertible to the oxide.

Pressure vessel sight glasses

Optical blanks, for example spectacle lenses, are produced by hot-blank pressing or injection molding of polyorganoheterosiloxanes which are obtainable by hydrolytic polycondensation of at least one titanium-, zirconium-or tin-compound, at least one organofunctional silane and, where applicable, at least one inorganic oxide component. For control of the optical characteristics and working properties, polyorganoheterosiloxanes which have a polymerizable organic radical may be modified by additional polymerization with other copolymerizable condensates or monomers.

Process of making optical blanks

A process for the production of transparent, electrically conductive, infrared-reflecting indium oxide-tin oxide layers, especially on glass panes, involves steps wherein the glass panes are dipped into a first solution containing a hydrolyzable silicon compound and hydrolyzable compounds of titanium, zirconium, aluminum, tin or tantalum;

Process for the producing of indium oxide-tin oxide layers and the

A dipping process for the production of cadmium stannate layers on a substrate, preferably glass, which comprises:

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Budenheim, Germany

Helmut Dislich