Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Neles Controls Oy

Lutz-Michael Berger

Manfred Nebelung

Petri Vuoristo

Mathias Herrmann

Thomas Hutzler

Tapio M&auml;ntyl&auml;

Tobias Naumann

Carl Christoph Stahr

Kai Laitinen

Stefan Langner

Tapio Maentylae

Robert B Heimann

Bernhard Wielage

Filofteia-Laura Toma

Sven Thiele

Stefanie Hildebrandt

Filotheia-Laura Toma

The invention relates to the field of ceramics and concerns a method for use in displays of electronic devices with high mechanical stress, for example. The object of the present invention is to provide a method by means of which thin ceramic parts having thicknesses of substantially <1 mm with high transparency are produced. The object is achieved by a method for producing thin transparent ceramic parts, in which ceramic powders are mixed together with a solvent and a monomer and a photoinitiator, and at least 0.0005% by mass of a photoinitiator is added, the mixture is subsequently introduced into a mould, then the mixture is irradiated for at least 1 min with light which has a wavelength for activating the photoinitiator, the moulded body is subsequently removed from the mould and dried, and then the debinding and sintering of the moulded body is carried out.

Process for producing thin transparent ceramic parts and thin transparent ceramic parts

The disclosure provides a method of producing thermally sprayed AlOcoatings having a high content of corundum without any property-reducing additives. The coatings may be utilized particularly in the field of electrical insulation, as a dielectric, and as protection from wear. The thermally sprayed AlOcoatings have a porosity of no more than 19%, and a high content of &#x3b1;-AlO(content of corundum) of at least 72% by volume. The coatings have a specific electrical resistance of &#x3e;1&#xb7;10Ohms&#xb7;cm, and a purity of &#x3e;97%. The production of said coatings is carried out utilizing aqueous or alcoholic suspensions made from substantially pure &#x3b1;-AlO, having a grain size of &#x3e;100 nm by thermal spraying.

[object Object]

A coating powder based on chemically modified titanium suboxides, for use in various coating techniques. Coatings produced from this powder are characterized by high electroconductivity, good solid lubricating properties and resistance to wear. For these reasons, there are numerous possibilities of use of components which were coated by suitable processes with this powder, especially as functional layers for fuel cells in electrochemical installations, in the new car industry, in mechanical engineering and in other economic activities. The coating powder based on titanium suboxides having a defined defect structure is characterized in that it is modified by at least one metallic alloying element and described by general formula: TiMeO.

Coating powder of Cr or V doped titanium suboxides

The invention relates to wear resistant parts for process valves. The use of said parts can be particularly advantageous in the chemical and petrochemical industry, in the mining industry and in other processing industries. According to the invention, the wear resistant parts for process valves are characterized by a 50 to 500 &mgr;m thick coating applied by thermal spraying on the valve surfaces subjected to wear, particularly on the bearing and sealing faces. The coating is characterized by the fact that one or more cubic hard material phases containing Ti and/or Ti and a second metal and a metal binder phase can be demonstrated therein, and by the fact that when the coatings are rubbed against each other within a temperature range of from room temperature to 600&deg; C., the friction coefficient is <0.6.

Wear resisting parts for process valves

Coating powder and method for its production

Modified composite silicon nitride powders for thermal coating

Growing community of inventors

Dresden, Germany

Lutz-Michael Berger