Abstract: An iridium alloy is produced having at least 85% by weight iridium, at least 0.005% by weight molybdenum, 0.001 to 0.6% by weight hafnium and, optionally, rhenium, the sum of molybdenum and hafnium being between 0.002 and 1.2% by weight. The iridium alloy is produced in a process, in which an IrMo and an IrHf master alloy, respectively, are created in an electric arc and immersed into an iridium melt, optionally together with Re.

Abstract: Known synthetic quartz glass tubes for the production of a preform have an inner bore with a surface layer produced without using tools in the molten state and an inner zone. The aim of the invention is to provide a tube which does not release any OH groups to the surroundings. For this purpose, the surface layer (30) has a thickness of 10 ?m and an average OH content of not more than 5 ppm by weight and an average surface roughness Ra of not more than 0.1 ?m. The inner zone (34) that starts on the surface layer (30) and terminates 10 ?m before the outer wall has an average OH content of not more than 0.2 ppm by weight. A simple and inexpensive method for producing a quartz tube of the above type is to continuously draw a tube strand from a softened quartz glass mass in a vertical drawing process. A scavenging gas is circulated through the inner bore of the tube, said gas having a water content of less than 100 ppb per weight.

Abstract: The invention relates to a method allowing cost-effective production of doped quartz glass, particularly laser-active quartz glass, that is improved with regard to the homogeneity of the doping material distribution, in that a suspension is provided comprising SiO2 particles and an initial compound for at least one doping material in an aqueous fluid, the fluid being removed under formation of a doped intermediate product comprising particles of the doping material or particles of the precursor substance or the doping material, and the doped quartz glass is formed by sintering the doped intermediate product, wherein at least part of the particles of the doping material or the particles of the precursor substance of the same is generated in the suspension as a precipitate of a pH-value-controlled precipitation reaction of the initial compound.

Abstract: In a known method for producing tubes of quartz glass, a hollow cylinder (2) of quartz glass is continuously supplied to a heating zone (1) and is softened therein in regions, and a tube strand (21) is drawn off at a drawing speed from the softened region with formation of a drawing bulb (26), and the tubes to be produced are cut to length in the form of tube strand pieces by separating the tube strand (21) at a desired separation point (T, Vu, Vo) and an internal pressure differing from the external pressure applied to the outer cladding is maintained in the inner bore (4) of the hollow cylinder (2) in that the inner bore (4) of the tube strand is provided with a flow obstacle.

Abstract: One aspect is a device including at least two interconnected metal parts. The two interconnected parts are formed from metals with different melting temperature from the group consisting of the elements Pt, Pd, Ag, Au, Nb, Ta, Ti, Zr, W, V, Hf, Mo, Co, Cr, Ni, Ir, Re, Ru as well as alloys on the basis of at least one of those elements. The metal part with the lower melting temperature is fused onto the metal part with the higher melting temperature and both parts are friction-locked and/or form-locked with each other.

Abstract: The invention relates to a measuring device of flexible material for the determination of parameters for the production of dental prostheses which combines different functions, including protractor, spacing template, ruler and an option of utilizing a compass-formed modulus shear measuring module to facilitate shearing.

Abstract: An apparatus is provided having a chamber for the irradiation of at least one substrate. The apparatus includes a transfer channel for inserting and removing the substrate, a substrate holder inside the chamber, a vacuum pump, and at least one irradiation unit for irradiating the substrate. The irradiation unit has at least one infrared emitter including an integrated reflector.

Abstract: A guide system for signal lines includes a guide tube, through which the signal lines are guided, a cooling system which laterally surrounds the guide tube and has at least one coolant chamber and at least one inlet and at least one outlet for the coolant. The coolant chamber is tubular in construction and is hermetically sealed by a seal at least at one end face.

Abstract: The invention starts from a known method for producing a glass body, comprising forming a cylindrical blank by successive deposition of a plurality of material layers on the outer surface of a substrate body which is rotating about its longitudinal axis, by using an arrangement of a plurality of depositors which are directed onto the substrate body and which are fed via supply lines with process media for material layer deposition and which are moved without a reversing movement relative to the longitudinal axis of the substrate body. Starting therefrom, to provide a method for producing a glass body of high homogeneity that can be realized in a constructionally simple way, the invention suggests that the movement of the depositor arrangement along the longitudinal axis of the substrate body should be accompanied by a displacement of the substrate body.

Abstract: One aspect is a coil including a laminate having metal layers. The coil is configured for the electrical connection of stimulation electrodes. One of the metal layers exhibits good electrical conductivity and another metal layer great mechanical strength.

Abstract: A temperature measuring device for molten metal includes a porous plug with a first end and an opposed second end, an outer protective sheath with a closed end, an inner protective tube with a closed end, and a thermocouple arranged within an interior of the inner protective tube. The outer protective sheath extends away from the first end of the plug and the inner protective tube is arranged within an interior of the outer protective sheath. The porous plug comprises a substantially refractory material and the outer protective sheath consists essentially of substantially refractory metal oxide and graphite. A junction of the thermocouple is proximate to the closed end of the inner protective tube.

Abstract: One aspect is a stranded wire containing numerous coils. The stranded wire is configured as an electrical connection between an electrical stimulation device that is connected to the proximal end of the stranded wire, and an electrode connected to the distal end of the stranded wire. At least one coil includes a tantalum or niobium-based metal.

Abstract: A lance has a top part and a bottom part for arrangement on the sensor or sampler. The top and bottom parts are detachably connected to each other by a plug-in coupling. The plug-in coupling has two coupling parts, one arranged on the top part and the other arranged on the bottom part of the lance, that can be inserted one in the other in the longitudinal direction of the lance. One coupling part has an opening extending from its front face in the longitudinal direction of the lance and an extension formed in the peripheral direction of the coupling part. The other coupling part has a raised portion that engages the extension. A blocking device, movable in the longitudinal direction of the lance, is arranged on the top or bottom part A catch element of the blocking device is arranged at least partially between the raised portion and the opening.

Abstract: An immersion thermocouple is described. The immersion thermocouple includes a heat resistant sheathing, the interior of which is substantially filled with a heat resistant cement, a first U-shaped tube enclosing a thermocouple fixed in the heat resistant cement, and a second U-shaped tube fixed in the heat resistant cement. The second U-shaped tube bridges the first U-shaped tube at an angle of approximately ninety degrees. The immersion thermocouple also includes a shield circumferentially surrounding the first and the second U-shaped tubes proximate to where the first and the second U-shaped tubes are fixed to the heat resistant cement.

Abstract: A no-clean low residue solder paste is described for die-attach dispensing or fine pitch printing of semiconductor devices. The solder paste has a homogeneous consistency with no tendency to paste separation. The ultimately remaining residue is clear and crystal like and is compatible with further processing steps without prior cleaning with a solvent to remove flux residue. The solder paste comprises a relatively low amount of rosin in combination with a viscous solvent system, thixotropic agents, activators, additives and optionally plasticizers.

Abstract: A spool includes a body and a chromium layer. The body integrally includes a first portion having an annular shape and a second portion having a tubular shape. The body is formed using plastic. The first portion is provided on both sides of the second portion. The chromium layer is plated on the body. The chromium layer has a uniform thickness of about 0.1 ?m to about 100 ?m. A gold alloy wire is wound on the chromium layer. The chromium layer has a glossy surface. The spool is combined with a bonding device such that the spool electrically connects the bonding device to the gold alloy wire wound on the chromium layer. The shape of the spool is not easily changed by an external impact. When the gold alloy wire is wound on the spool, a scratch is not formed on the spool. Furthermore, the cost required for forming the spool is relatively small so that the spool may be used as an expendable supply. As a result, a recycling process is not required.

Abstract: A fused glass crucible includes a collar of doped aluminum silica that defines uppermost and outermost surfaces of the crucible. The melt line that defines the surface of molten silicon in the crucible may be substantially at the lower end of the collar or slightly above it. Crystallization of the collar makes it hard and therefore supports the remaining uncrystallized portion of the crucible above the melt line. The melt line may also be below the lower end of the collar, especially if the melt is drawn down or poured early in the process. Because there is little or no overlap or because the overlap does not last long, the doped aluminum collar is not damaged by the heat of from the melt.

Abstract: In a known method for the production of a blank mold for optical fibers, a fluorine-doped SiO2 enveloping glass is produced on a core glass cylinder that rotates about its longitudinal axis, wherein a silicon-containing starting substance is fed to a plasma burner, said substance is then oxidized in a plasma flame assigned to the plasma burner to obtain SiO2 particles, the SiO2 particles are deposited by layers on the enveloping surface of the cylinder of the core glass cylinder in the presence of fluorine and sintered into the enveloping glass. The invention aims at providing an economical method, which builds upon the above-mentioned method, in order to produce a blank mold from which optical multi-mode fibers (52) can be obtained.

Abstract: A laser excitation lamp has a discharge tube and a hot cathode in the shape of a pin. The gas space is reduced in the region of the pin cathode. A method is also provided for production of the lamp, in which the gas space or the free cross section around the cathode is reduced by another processing step. The laser excitation lamp may be used as a pumping light source for lasing media.

Abstract: The invention relates to the arrangement of a film resistor (chip) in an exhaust-gas pipe or exhaust-gas recirculation pipe, wherein the film resistor is fixed in a carrier, which is sealed against a shield or a housing, wherein this shield or housing is connected tightly to the exhaust-gas pipe or exhaust-gas recirculation pipe, wherein the carrier and the shield or the housing are sealed against each other spaced apart from the exhaust-gas pipe or exhaust-gas recirculation pipe radially outside of this pipe.