Patents by Inventor Gerhard Leichtfried
Gerhard Leichtfried has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20120073958Abstract: A tubular target formed of molybdenum or a molybdenum alloy has an oxygen content of less than 50 ?g/g, a density of greater than 99% of the theoretical density, and an average grain size of less than 100 ?m. The molybdenum or molybdenum alloy tube may be produced by extrusion. In one embodiment, the molybdenum tube has a backing tube of titanium or titanium alloy. In an embodiment, the molybdenum tube has a varying wall thickness with an increase towards its ends.Type: ApplicationFiled: December 2, 2011Publication date: March 29, 2012Applicant: PLANSEE SEInventors: PETER ABENTHUNG, KARL HUBER, HARALD LACKNER, GERHARD LEICHTFRIED, PETER POLCIK, CHRISTIAN WERATSCHNIG
-
Publication number: 20120073959Abstract: A tubular target is formed of molybdenum or a molybdenum alloy which has an oxygen content of less than 50 ?g/g, a density of greater than 99% of the theoretical density and an average grain size of less than 100 ?m. The molybdenum or molybdenum alloy tube may be produced by extrusion and it is formed with walls having a wall thickness that increases towards the ends of the tube. The molybdenum tube has a backing tube of titanium or titanium alloy that is attached inside with a material bond connection. Alternatively, the backing tube is formed of austenitic steel or a copper alloy.Type: ApplicationFiled: December 2, 2011Publication date: March 29, 2012Applicant: PLANSEE SEInventors: PETER ABENTHUNG, KARL HUBER, HARALD LACKNER, GERHARD LEICHTFRIED, PETER POLCIK, CHRISTIAN WERATSCHNIG
-
Publication number: 20100269907Abstract: A thin-film solar cell has a rear electrode layer formed of at least 50 atom % of Mo, which in addition to the common contaminants includes 0.1 to 45 atom % of at least one element from the group of Ti, Zr, Hf, V, Nb, Ta, and W, 0 to 7.5 atom % of Na, and 0 to 7.5 atom % of at least one element forming a compound with Na that has a melting point >500 C. The rear electrode layer has good long-term resistance and bonding with the CIGS absorber layer. In addition, the constancy of the alkali metal integration in the absorber layer is improved.Type: ApplicationFiled: December 16, 2008Publication date: October 28, 2010Applicant: PLANSEE METALL GMBHInventors: Harald Lackner, Gerhard Leichtfried, Nikolaus Reinfried, Jörg Winkler
-
Publication number: 20100233576Abstract: An interconnector, or bipolar plate, for a high-temperature solid electrolyte fuel cell is composed of a sintered chromium alloy which has sintering pores and contains >90% by weight of Cr, from 3 to 8% by weight of Fe and optionally from 0.001 to 2% by weight of at least one element of the group of rare earth metals. The chromium alloy contains from 0.1 to 2% by weight of Al and the sintering pores are at least partially filled with an oxidic compound containing Al and Cr. The interconnector has a high impermeability to gas and dimensional stability.Type: ApplicationFiled: March 11, 2010Publication date: September 16, 2010Applicant: PLANSEE SEInventors: Marco Brandner, Wolfgang Kraussler, Gerhard Leichtfried, Andreas Venskutonis
-
Patent number: 7439676Abstract: A cold cathode fluorescent lamp (1) has feedthrough pins (5) made from molybdenum or a molybdenum alloy that form a glass-metal seal (6) with a glass composed of 55-75 wt. % SiO2, 13-25 wt. % B2O3, 0-10 wt. % Al2O3, 5-12 wt. % alkali oxides, 0-3 wt. % alkali earth oxides, 0-5 wt. % ZrO2, 0-10 wt. % TiO2 und 0-5 wt. % remaining oxides. The lamp has hollow cathodes (4) made from a material of the group molybdenum, molybdenum alloys, niobium, niobium alloys, and the lamp is manufactured in a compact form using conventional manufacturing parameters, and the resulting lamp has crack free, long-term vacuum-tight glass-metal seals.Type: GrantFiled: May 27, 2004Date of Patent: October 21, 2008Assignees: Plansee SE, Schott AGInventors: Herman Walser, Wolfram Knabl, Gerhard Leichtfried, Jörg Hinrich Fechner, Franz Ott, Ralf Diezel, Brigitte Hueber
-
Patent number: 7279839Abstract: A short arc high-pressure discharge lamp (1) for dc operation, includes a discharge vessel (2) that has two necks (4) diametrically opposite each other, in which an anode (26) and a cathode (7) made of tungsten are melted in a gastight manner, and which has a filling made of at least one noble gas and possibly mercury. According to the invention, at least the material of the cathode tip (11) contains lanthanum oxide La2O3 and at least another oxide from the group consisting of hafnium oxide HfO2 and zirconium oxide ZrO2 in addition to the abovementioned tungsten.Type: GrantFiled: March 5, 2003Date of Patent: October 9, 2007Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbHInventors: Lars Menzel, Dietmar Ehrlichmann, Thomas Mehr, Stephen Berndanner, Wolfgang Spielmann, Gerhard Leichtfried
-
Publication number: 20070148031Abstract: A component or semifinished product is produced of a material of the group comprising molybdenum, molybdenum alloy, tungsten and tungsten alloy with an average relative density of >98.5% and a relative core density of >98.3%. The material is sintered to a relative density D, with 90%<D<98.5% and a proportion of the closed pores with respect to the overall porosity of >0.8 and also hot-isostatically pressed at a temperature 0.40 to 0.65×solidus temperature and under a pressure of from 50 to 300 MPa. Components produced in this way, used for example as electrodes, have much improved service life characteristics.Type: ApplicationFiled: December 26, 2006Publication date: June 28, 2007Inventors: Wolfgang Spielmann, Gerhard Leichtfried
-
Publication number: 20070086909Abstract: A method for producing a tubular target formed of molybdenum or a molybdenum alloy which has an oxygen content of less than 50 ?g/g, a density of greater than 99% of the theoretical density and an average grain size of less than 100 ?m and which is connected to a supporting tube. The molybdenum or molybdenum alloy tube is produced by extrusion.Type: ApplicationFiled: October 16, 2006Publication date: April 19, 2007Inventors: Peter Abenthung, Karl Huber, Harald Lackner, Gerhard Leichtfried, Peter Polcik, Christian Weratschnig
-
Publication number: 20060157884Abstract: The invention relates to a process for producing a diamond-containing composite material. Diamond grains having a mean particle size of from 5 to 300 ?m are infiltrated under atmospheric pressure or with the aid of pressure with a eutectic or near-eutectic alloy which has a solidus temperature of <900° C. and comprises at least one element or an alloy from the group consisting of Cu, Ag, Au and at least one element from the group consisting of Si, Y, Sc, rare earth metals or densified by hot pressing. The components produced in this way have a high thermal conductivity and low thermal expansion and are particularly useful as heat sinks for semiconductor components.Type: ApplicationFiled: January 20, 2004Publication date: July 20, 2006Inventors: Arndt Ludtke, Gerhard Leichtfried
-
Publication number: 20040239253Abstract: A cold cathode fluorescent lamp (1) has feedthrough pins (5) made from molybdenum or a molybdenum alloy that form a glass-metal seal (6) with a glass composed of 55-75 wt. % SiO2, 13-25 wt. % B2O3, 0-10 wt. % Al2O3, 5-12 wt. % alkali oxides, 0-3 wt. % alkali earth oxides, 0-5 wt. % ZrO2, 0-10 wt. % TiO2 und 0-5 wt. % remaining oxides. The lamp has hollow cathodes (4) made from a material of the group molybdenum, molybdenum alloys, niobium, niobium alloys, and the lamp is manufactured in a compact form using conventional manufacturing parameters, and the resulting lamp has crack free, long-term vacuum-tight glass-metal seals.Type: ApplicationFiled: May 27, 2004Publication date: December 2, 2004Applicants: Plansee Aktiengesellschaft, Schott GlasInventors: Herman Walser, Wolfram Knabl, Gerhard Leichtfried, Jorg Hinrich Fechner, Franz ott, Ralf Diezel, Brigitte Hueber
-
Patent number: 6753650Abstract: A method for producing an electric lamp having a vitreous lamp bulb and a foil of molybdenum or a doped molybdenum alloy which is pinched in the lamp bulb includes post-treating the unfinished foil such that substantially non-contiguous, insular regions of material agglomerates are formed. The material agglomerates are formed of molybdenum, molybdenum alloys, titanium, silicon, an oxide, a mixed oxide and/or an oxidic compound, with a vapor pressure of in each case less than 10 mbar at 2000° C. The substantially non-contiguous, insular regions are formed on at least 5 percent and at most 60 percent of the area of the foil surface. In this way, the adhesive strength between the foil and the glass and therefore also the service life of the lamp are significantly improved.Type: GrantFiled: May 18, 2001Date of Patent: June 22, 2004Assignee: Plansee AktiengesellschaftInventors: Gerhard Leichtfried, Bernhard Retter, Manfred Sulik
-
Publication number: 20020008477Abstract: A method for producing an electric lamp having a vitreous lamp bulb and a foil of molybdenum or a doped molybdenum alloy which is pinched in the lamp bulb includes post-treating the unfinished foil such that substantially non-contiguous, insular regions of material agglomerates are formed. The material agglomerates are formed of molybdenum, molybdenum alloys, titanium, silicon, an oxide, a mixed oxide and/or an oxidic compound, with a vapor pressure of in each case less than 10 mbar at 2000° C. The substantially non-contiguous, insular regions are formed on at least 5 percent and at most 60 percent of the area of the foil surface. In this way, the adhesive strength between the foil and the glass and therefore also the service life of the lamp are significantly improved.Type: ApplicationFiled: May 18, 2001Publication date: January 24, 2002Inventors: Gerhard Leichtfried, Bernhard Retter, Manfred Sulik
-
Patent number: 6090227Abstract: Structural units which come into contact with glass melts and ceramic melts are exposed to strong corrosive attack. Molybdenum is a known material for glass melt electrodes but it is not usable for the majority of highly corrosive glass and ceramic melts. The use of a special molybdenum and/or tungsten alloy as the material for the structural unit reduces corrosion even in the case of contact with highly corrosive glass and ceramic melts.Type: GrantFiled: May 7, 1998Date of Patent: July 18, 2000Assignee: Schwarzkopf Technologies Corp.Inventors: Gerhard Leichtfried, Hans-Peter Martinz, Joachim Disam
-
Patent number: 5606141Abstract: The present invention relates to a strip-like current feeder based on molybdenum-yttrium oxide, for electric lamps with a metal/glass sealing. In addition to molybdenum-yttrium oxide, the strip material contains 0.03 to 1.0% by weight cerium oxide and the ratio of cerium oxide to yttrium oxide amounts to 0.1 to 1. As compared to known current feeders, the current feeder according to the present invention has a distinctly enhanced resistance to corrosion or oxidation.Type: GrantFiled: June 19, 1995Date of Patent: February 25, 1997Assignee: Schwarzkopf Technologies CorporationInventor: Gerhard Leichtfried
-
Patent number: 5102474Abstract: In a process for manufacturing semi-finished products from sintered refractory metal alloys with a stacked microstructure, the sinter feed reshaped by at least 85% is subjected prior to recrystallization annealing to an intermediate annealing for at least 20 minutes at a temperature not less than 700.degree. C. and not greater than that at which no further recrystallization occurs. Following this intermediate annealing, the hot feed is deformed by a further 3% to 30%. The process makes it possible to manufacture semi-finished products with a good stacked microstructure and of substantially greater dimensions, or of the same dimensions and a substantially better stacked microstructure, than can be obtained with known manufacturing processes.Type: GrantFiled: September 1, 1990Date of Patent: April 7, 1992Assignee: Schwarzkopf Technologies CorporationInventors: Ralf Eck, Gerhard Leichtfried
-
Patent number: 4950327Abstract: A creep-resistant alloy having a tiered structural arrangement of one or several refractory metals Mo, W, Nb, Ta, V, Cr containing certain doping agents, as well as a process for producing the same. The special doping agents are compounds and/or mixed phases of such compounds selected from the group of oxides, nitrides, carbides, borides, silicates or aluminates having a melting point higher than 1500.degree. C. The size of their grains is .ltoreq.1.5 .mu.m, their proportion in the alloy is comprised between 0.005 and 10% by weight. Unlike in the known state of the art, the use of porassium as doping agent is avoided in this alloy. A good reproducible consolidation and in particular high densities during sintering can thus be obtained. Furthermore, this alloy has better ambient temperature, heat and creep resistance properties than known alloys of refractory metal with a tiered structual arrangement.Type: GrantFiled: September 27, 1988Date of Patent: August 21, 1990Assignee: Schwarzkopf Development CorporationInventors: Ralf Eck, Gerhard Leichtfried