Schunk Kohlenstofftechnik Gmbh

Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Degussa Aktiengesellschaft

Roland Weiss

Martin Henrich

Thorsten Scheibel

Marco Ebert

Andreas Lauer

Gotthard Nauditt

Monika Oswald

Volker Thole

Stefan Schneweis

Uwe Petasch

Stefan Siegel

Jeremias Schoenfeld

Corinna Kissner

Gottfried Boden

Martin Kühn

Dietrich Kehr

Jeremias SCHÖNFELD

The invention relates to a method for producing a molded body, having a silicon carbide support matrix and an integral carbon structure, wherein a base body on the basis of a powder mixture containing silicon carbide or silicon and carbon and of a binder is built in layers in a generative method, and wherein a pyrolysis of the base body is effected for realizing the molded body after the binder has been cured, wherein the carbon content of the carbon structure is adjusted by way of the pyrolysis of the binder and by way of the carbon content of the powder mixture or infiltration of a carbon material into the silicon carbide support matrix.

Method for producing a molded body

A method for the production of a ceramic substrate for a semiconductor component, includes the steps of producing paper containing at least cellulose fibers, as well as a filler to be carbonized and/or SiC, pyrolizing the produced paper, and siliconizing the pyrolyzed paper.

Method for the production of a ceramic substrate, and a ceramic substrate

A support for structural components that are subjected to a thermal treatment process. The support includes a frame having limbs and extending therefrom a grid of intersecting strands. In order to prevent the support from warping even when subjected to strong thermal loads or variations in temperature, the frame is produced from a temperature-resistant material and the strands are produced from carbon fibers or ceramic fibers that form the grid, extending from the limbs of the frame.

Support for structural components and method for producing the same

Aqueous dispersion containing a metal oxide powder with a fine fraction and a coarse fraction, in which&#x2014;the metal oxide powder is silicon dioxide, aluminum oxide, titanium dioxide, zirconium dioxide, cerium oxide or a mixed oxide of two or more of the aforementioned metal oxides,&#x2014;the fine fraction is present in aggregated form and has a mean aggregate diameter in the dispersion of less than 200 nm,&#x2014;the coarse fraction consists of particles with a mean diameter of 1 to 20 &#x3bc;m, &#x2014;the ratio of fine fraction to coarse fraction is 2:98 to 30:70, and&#x2014;the content of metal oxide powder is 50 to 85 wt. %, referred to the total amount of the dispersion. The aqueous dispersion is produced by a process comprising the steps:&#x2014;production of a fine fraction dispersion by dispersing the pulverulent fine fraction in water by means of an energy input of at least 200 KJ/m3?, and&#x2014;introducing the coarse fraction in the form of a powder into the fine fraction dispersion under dispersing conditions at a low energy input. Process for the production of molded articles using the dispersion.

Highly-filled, aqueous metal oxide dispersion

A method for the production of a carbon or a ceramic component based on carbon, using a cellulose-containing semi-finished molded piece which is pyrolyzed. According to the invention, homogeneous large-size ceramic components may be produced, whereby a cellulose-containing, semi-finished molded piece containing fibers, chips or strands of homogeneous density distribution and homogeneous structure is used as semi-finished molded piece and is pyrolyzed in non-oxidizing gas atmospheres.

Method for the production of a carbon or ceramic component

The invention involves a rotary anode of an x-ray tube with a cooling element of carbon fiber material constructed so as to be rotationally symmetrical around a coaxial rotation axis. In order to achieve a high heat conducting capability, it is recommended that the base of the cooling element () be a preform constructed according to the tailored fiber placement process (TFP), that the cooling element have a hollow cylinder and a one-piece construction, that the carbon fibers () run parallel along its entire length or basically parallel to the axis () and have a heat conductivity &#x3bb; with &#x3bb;&#x3e;/=250 W/m&#xd7;K, and that the carbon fibers be connected across a matrix containing carbon whose graphite crystallites are aligned along the carbon fibers.

Rotary anode as well as a method for producing a cooling element of a rotary anode

A composite ceramic body includes a fiber-reinforced core region containing carbon, and a surface region containing SiC. In order to produce a composite ceramic body having good long-term behavior, the proportion of SiC contained in the body varies continuously, or essentially continuously, from inside the core region towards the surface region.

Growing community of inventors

Huettenberg, Germany

Roland Weiss