Patents Assigned to Institut fuer neue Materialen gemeinnuetzige GmbH
  • Patent number: 6187256
    Abstract: A process is described for producing a conductive sintered body based on silicon carbide, in which a) silicon carbide particles, optionally pretreated with a surface modifier, are dispersed in an aqueous and/or organic medium and positive or negative surface charges are generated on the silicon carbide particles by adjustment of the pH of the dispersion obtained; b) carbon black and boron carbide are mixed in as sintering aids, where at least the carbon black particles have a surface charge opposite to the surface charge of the silicon carbide particles and the boron carbide can also be added, completely or in part, at a later point in time (stage c′)); c) the slip thus obtained is shaped directly to form a green body or c′) a sinterable powder is isolated from the slip obtained and is shaped to form a green body, where the above boron carbide can also be added to this sinterable powder; and d) the green body obtained is subjected to pressureless sintering to form a sintered body in essential
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: February 13, 2001
    Assignee: Institut für Neue Materialen gemeinnützige GmbH
    Inventors: Mesut Aslan, Rüdiger Nass, Helmut Schmidt
  • Patent number: 6156388
    Abstract: A method of manufacturing a substrate coated with a transparent, colored coating stable to high temperature and UV includes coating the substrate with a coating composition including at least one element which is able to form a vitreous, crystalline, or partially crystalline oxide, in the form of a compound which on heat treatment yields the oxide and is present as a sol or solution in an at least predominantly aqueous medium, as the matrix-forming component, and at least one member selected from the group consisting of metal colloids, metal compound colloids, metal alloy colloids, and metal compounds which form metal colloids under reducing conditions, as the coloring component; and heat-curing the resulting coating. Particularly suitable substrates are glass substrates, such as (halogen) lamp bulbs and gas discharge tubes.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: December 5, 2000
    Assignee: Institut fuer neue Materialen gemeinnuetzige GmbH
    Inventors: Klaus Endres, Marion Lindenstruth, Martin Mennig, Matthias Pietsch, Helmut Schmidt