Abstract: An electrode system with a current feedthrough through a ceramic discharge vessel is provided which, on one hand, increases the visible output of lamps and, on the other hand, allows smaller dimensions. For this purpose, the current feedthrough is made of rhenium or a platinum-group metal. In this way, improved color reproduction is also achievable. In preferred embodiments: (a) the current feedthrough is made of rhenium or a rhenium alloy or a platinum-group metal or a platinum-group metal alloy and the current feedthrough is brazed flush in the discharge vessel, (b) the discharge vessel has no shaft, and/or (3) the current feedthrough is in the form of one or more joined spheres.

Abstract: An electrode system with a current feedthrough through a ceramic discharge vessel is provided which, on one hand, increases the visible output of lamps and, on the other hand, allows smaller dimensions. For this purpose, the current feedthrough is made of rhenium or a platinum-group metal. In this way, improved color reproduction is also achievable. In preferred embodiments: (a) the current feedthrough is made of rhenium or a rhenium alloy or a platinum-group metal or a platinum-group metal alloy and the current feedthrough is brazed flush in the discharge vessel, (b) the discharge vessel has no shaft, and/or (3) the current feedthrough is in the form of one or more joined spheres.

Abstract: A tube target for cathode sputtering installations, and a process for producing a cylindrical hollow body for such a tube target and its use. The problem of providing a simple and low-cost process for producing a cylindrical hollow body for a tube target and of providing a cylindrical hollow body with a uniform, fine-grained structure is solved by the cylindrical hollow body being produced by centrifugal casting of a melt.

Abstract: A composite membrane is provided having a flexible metallic substrate for separation of hydrogen from gas mixtures, which achieves a separation ratio of hydrogen to nitrogen of greater than about 4,000 at operating temperatures higher than 300° C. The composite membrane has a layer system arranged on at least one surface of the substrate, the layer system having a rigid, non-self-supporting, nonmetallic inorganic diffusion barrier layer adjacent the substrate, and at least one hydrogen-permeable, nonporous, metallic membrane on the side of the barrier facing away from the substrate. A method for production of such a composite membrane is also provided in which the diffusion barrier layer adjoining the membrane layer is formed by PVD, CVD, sol-gel process, or sintering-on powder particles, and the membrane layer is electrodeposited on the diffusion barrier layer.

Abstract: A hollow cylindrical target for a cathode sputtering unit with a hollow cylindrical sputtering material and a target holder is disclosed. The sputtering material has an annular cross section and concentrically surrounds a longitudinal segment of the target holder. The target holder extends out of the sputtering material at least at one end of the target to allow connection to the cathode sputtering unit. The at least one part of the target holder that extends from the sputtering material is a single part that can be detached from the target by at least one screw fitting.

Abstract: A process for producing a tube target for cathode sputtering plants, in which the tube target is formed from a metallic inner tube (target holder) made of a first material with a first melting point of Ts1≧900 K and a metallic outer tube (target) that concentrically surrounds the inner tube and that is made of a second material with a second melting point of Ts2≦800 K. The inside diameter of the outer tube and the outside diameter of the inner tube are proportioned in such a way that the two tubes fit together tightly and are mechanically firmly joined. The outer tube is formed by casting the second material in a molten state in a heated, vertical, cylindrical permanent mold, which has a heated mandrel that constitutes the inner tube.

Abstract: A composite membrane is provided having a flexible metallic substrate for separation of hydrogen from gas mixtures, which achieves a separation ratio of hydrogen to nitrogen of greater than about 4,000 at operating temperatures higher than 300° C. The composite membrane has a layer system arranged on at least one surface of the substrate, the layer system having a rigid, non-self-supporting, nonmetallic inorganic diffusion barrier layer adjacent the substrate, and at least one hydrogen-permeable, nonporous, metallic membrane on the side of the barrier facing away from the substrate. A method for production of such a composite membrane is also provided in which the diffusion barrier layer adjoining the membrane layer is formed by PVD, CVD, sol-gel process, or sintering-on powder particles, and the membrane layer is electrodeposited on the diffusion barrier layer.

Abstract: A hollow cylindrical target for a cathode sputtering unit with a hollow cylindrical sputtering material and a target holder is disclosed. The sputtering material has an annular cross section and concentrically surrounds a longitudinal segment of the target holder. The target holder extends out of the sputtering material at least at one end of the target to allow connection to the cathode sputtering unit. The at least one part of the target holder that extends from the sputtering material is a single part that can be detached from the target by at least one screw fitting.

Abstract: A bushing for drawing glass fibers and its use.

Abstract: A process for producing a coating on a refractory structural member, in which a noble metal alloy is applied as a coating material to the refractory structural member. The noble metal alloy contains, among other constituents, an oxidizable substance, which includes boron and/or phosphorus and/or antimony and/or arsenic. The refractory structural member and the coating are heated at least once in an oxygen-containing atmosphere to a temperature T that is greater than or equal to the liquidus temperature TL of the noble metal alloy. The oxidizable substance is oxidized during this heating process, and the oxide that has formed is at least partially vaporized. The temperature T is maintained until the proportion of oxidizable substance in the coating is <0.1 atomic percent, and the coated refractory structural member is then cooled.

Abstract: A hollow cylindrical target for a cathode sputtering unit with a hollow cylindrical sputtering material and a target holder. The sputtering material has an annular cross section and concentrically surrounds a longitudinal segment of the target holder. The target holder extends out of the sputtering material at least at one end of the target to allow connection to the cathode sputtering unit. The at least one part of the target holder that extends from the sputtering material is a single part that can be detached from the target by at least one screw fitting.

Abstract: A process for producing a tube target for cathode sputtering plants, in which the tube target is formed from a metallic inner tube (target holder) made of a first material with a first melting point of Ts1≧900 K and a metallic outer tube (target) that concentrically surrounds the inner tube and that is made of a second material with a second melting point of Ts2≦800 K. The inside diameter of the outer tube and the outside diameter of the inner tube are proportioned in such a way that the two tubes fit together tightly and are mechanically firmly joined. The outer tube is formed by casting the second material in a molten state in a heated, vertical, A cylindrical permanent mold, which has a heated mandrel that constitutes the inner tube.

Abstract: An SiO2-glass bulb with at least one current lead-in made of a gas-tight composite material, such that the composite material consists of a noble metal with a melting point >1,700° C. and SiO2 and is at least partially coated with a layer of SiO2. The noble metal and the SiO2 are homogeneously distributed in the composite material. The noble metal content of the composite material is ≧10 vol. % to ≦50 vol. %, and the SiO2 coating covers the composite material at least in the region of the connection with the SiO2-glass bulb.

Abstract: Platinum—iron alloys that contain 95-96 wt % Pt, 2-3 wt % Fe, and 20-3 wt % Ru and/or Ir, and are suitable especially for the fabrication of jewelry.

Abstract: A hollow cylindrical target for a cathode sputtering unit with a hollow cylindrical sputtering material and a target holder. The sputtering material has an annular cross section and concentrically surrounds a longitudinal segment of the target holder. The target holder extends out of the sputtering material at least at one end of the target to allow connection to the cathode sputtering unit. The at least one part of the target holder that extends from the sputtering material is a single part that can be detached from the target by at least one screw fitting.

Abstract: An SiO2-glass bulb with at least one current lead-in made of a gas-tight composite material, such that the composite material consists of a noble metal with a melting point >1,700° C. and SiO2 and is at least partially coated with a layer of SiO2. The noble metal and the SiO2 are homogeneously distributed in the composite material. The noble metal content of the composite material is ≧10 vol. % to ≦50 vol. %, and the SiO2 coating covers the composite material at least in the region of the connection with the SiO2-glass bulb.

Abstract: A process for producing a coating on a refractory structural member, in which a noble metal alloy is applied as a coating material to the refractory structural member. The noble metal alloy contains, among other constituents, an oxidizable substance, which includes boron and/or phosphorus and/or antimony and/or arsenic. The refractory structural member and the coating are heated at least once in an oxygen-containing atmosphere to a temperature T that is greater than or equal to the liquidus temperature TL of the noble metal alloy The oxidizable substance is oxidized during this heating process, and the oxide that has formed is at least partially vaporized. The temperature T is maintained until the proportion of oxidizable substance in the coating is <0.1 atomic percent, and the coated refractory structural member is then cooled.