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| Number | Title | Issue Date |
| 7351271 | Method of manufacturing niobium and/or tantalum powder A method of manufacturing niobium and/or tantalum powder consisting of: a first-stage reduction process of reducing niobium and/or tantalum oxides with alkali metals and/or alkaline-earth metals to obtain low-grade oxide powder represented by (NbTa) Ox, where x=0.06... | 04/01/2008 |
| 7261761 | Metallic nickel powder and process for production thereof A metallic nickel powder exhibits superior oxidation behavior and sintering behavior in a process for production of a multilayer ceramic capacitor, and as a result, can prevent delamination, a process for production of the metallic powder is provided. The metallic n... | 08/28/2007 |
| 7166143 | Method for producing indium powder The invention relates to non-ferrous metallurgy and may be used for zinc and indium containing materials processing resulting in fine indium powder production by converting indium into a salt compound and subsequent treatment of the latter with a water solution in t... | 01/23/2007 |
| 7156893 | Method of making niobium and other metal powders Methods of forming niobium powders and other metal powders are described. The method involves milling the metal powders at elevated temperatures and in the presence of at least one liquid solvent. The methods of the present invention have the ability to reduce DC le... | 01/02/2007 |
| 7154736 | Ceramic multi-layer element and a method for the production thereof A method of manufacturing a ceramic component having multiple layers includes producing ceramic green foil comprised of PTC ceramic material, applying electrode paste containing tungsten onto areas of the ceramic green foil designated to be electrodes, alternately s... | 12/26/2006 |
| 7144546 | Nitrided valve metals and processes for making the same Nitrided valve metals are described, such as nitrided tantalum and nitrided niobium. The nitrided valve metals preferably have improved flow properties, higher Scott Densities, and/or improved pore size distribution which leads to improved physical properties of the... | 12/05/2006 |
| 7067197 | Powder metallurgy sputtering targets and methods of producing same A method of forming a sputtering target and other metal articles having controlled oxygen and nitrogen content levels and the articles so formed are described. The method includes surface-nitriding a deoxidized metal powder and further includes consolidating the pow... | 06/27/2006 |
| 6863708 | Method for producing metal powder and metal powder, and electroconductive paste and monolithic ceramic capacitor Metal chloride vapor and reducing gas are brought into contact to form metallic powder, the metallic powder is washed in carbonic acid aqueous solution, and the metallic powder is classified in a liquid phase. In this way, metallic powder, such as nickel powder, in ... | 03/08/2005 |
| 6830635 | Spindle-shaped goethite particles, spindle-shaped hematite particles, spindle-shaped magnetic metal particles containing iron as main component and processes for producing the same The present invention relates to spindle-shaped goethite particles having an average major axial diameter of 0.05 to 0.18 μm, spindle-shaped hematite particles having an average major axial diameter of 0.05 to 0.17 μm, spindle-shaped magnetic metal particles conta... | 12/14/2004 |
| 6780255 | Sm-fe-N based alloy powder and process for producing the same A magnetic powder of an Sm—Fe—N alloy, which has a mean particle diameter of 0.5 to 10 μm, and either an average acicularity of 75% or above or an average sphericity of 78% or above. The powder exhibits an extremely high residual magnetization and an extremely ... | 08/24/2004 |
| 6679937 | Copper powders methods for producing powders and devices fabricated from same Copper metal powders, methods for producing copper metal powders and products incorporating the powders. The copper metal powders have a small particle size, narrow size distribution and a spherical morphology. The method includes forming the metal partic... | 01/20/2004 |
| 6638336 | Manufacture of cost-effective titanium powder from magnesium reduced sponge The cost-effective titanium powder is manufactured by (a) magnesium-thermic reduction of titanium chlorides characterized by the formation of a hollow block of the reaction mass having an open cavity in the center of the block, (b) thermal-vacuum separati... | 10/28/2003 |
| 6261337 | Low oxygen refractory metal powder for powder metallurgy One step process for producing formed Ta/Nb powder metallurgy products using Ta and/or Nb hydride powders with an oxygen content greater than a target level, e.g., 300 ppm, heating the metal hydride in the presence of another metal having a higher affinit... | 07/17/2001 |
| 6090179 | Process for manufacturing of metallic power A process for manufacturing of metal powder from a halogen containing chemical compound of the metal. The process involves thermal treatment of the compound within a closed reactor and in non-oxidizing atmosphere so as to induce decomposition of the compo... | 07/18/2000 |
| 5605561 | Tantalum powder and electrolytic capacitor using same Tantalum powder obtained by adding magnesium powder to tantalum powder which is prepared by reducing potassium tantalum fluoride with sodium metal, without conventional heat-treatment for agglomeration, to remove oxygen present in the tantalum powder, the... | 02/25/1997 |
| 5242481 | Method of making powders and products of tantalum and niobium A powder of tantalum, niobium, or an alloy thereof, having an oxygen content less than about 300 ppm, and the production thereof without exposure to a temperature greater than about 0.7 TH. A powder metallurgy formed product of tantalum, niobiu... | 09/07/1993 |
| 5135567 | Method for producing metal powders from liquid phase containing metal ions The invention relates to a method for producing metal powders, where the employed raw materials are metal ions in a liquid phase. According to the invention, at a preliminary stage of the method the liquid phase containing metal ions is reduced with hydro... | 08/04/1992 |
| 4990307 | Method for producing particles for the production of permanent magnets Particles for the production of permanent magents are obtained by producing an article having Ca and a rare earth oxide including at least Nd oxide. The article is heated to effect Ca rare earth oxide reduction. Thereafter, particles of -60 mesh or finer ... | 02/05/1991 |
| 4954169 | Fine-grained, high-purity earth acid metal powders, a process for their production and their use Earth acid metal powders, such as tantalum or niobium, useful in the production of electrolytic capacitors and other electronic components, are agglomerates of sintered compacts, wherein the mean grain size of the agglomerates is no more than 2.0 μm, det... | 09/04/1990 |
| 4936909 | Process for producing fine particulate metals Proposed herein is a process for producing fine particulate metals comprising reducing fine powder of at least one iron compound selected from the group consisting of iron oxide, iron sulfate and iron chloride with a reducing gas to provide fine particula... | 06/26/1990 |
| 4923531 | Deoxidation of titanium and similar metals using a deoxidant in a molten metal carrier Process for deoxidizing refractory metals such as titanium which contain less than about one percent oxygen. The process described includes heating a liquid metal deoxidant contained in a liquid metal carrier to treat the oxidized metal. After removing th... | 05/08/1990 |
| 4917724 | Method of decalcifying rare earth metals formed by the reduction-diffusion process Mixtures of a rare earth and an intermetallic compound comprising the rare earth and a ferromagnetic metal selected from the group consisting of iron and cobalt which are formed by the reduction-diffusion process are decalcified by washing with an aqueous... | 04/17/1990 |
| 4767450 | Process for producing the rare earth alloy powders A rare earth-iron-boron alloy powder which consists essentially of: 12.5 to 20 at % R wherein R1 is 0.05 to 5 at %, 4 to 20 at % B, and 60 to 83.5 at % Fe, wherein R1 is at least one heavy rare earth element selected from the group consis... | 08/30/1988 |
| 4767454 | Process for the preparation of finely particulate chromium metal powder having a low oxygen content For preparing a chromium metal powder lacking in oxygen and having an average particle size not greater than 20 μm, a mixture of chromium oxide and calcium oxide, in a molar ratio of 1:0.5 to 1:2, is calcined initially at temperatures of 650° to 1,200°... | 08/30/1988 |
| 4725312 | Production of metals by metallothermia The metals of Groups (IV)(B) or (V)(B) of the Periodic Table, or of the lanthanide series, e.g., titanium metal, are conveniently produced, notably in powder form, by reducing a salt of such a metal by contacting same with liquid admixture comprising lith... | 02/16/1988 |
| 4582530 | Method of making a valve metal powder for electrolytic condensers and the like In the production of a vanadium group valve metal powder, especially tantalum, the reaction mixture of a double fluoride salt of the valve metal and metallic sodium and/or potassium is doped with sulfur before a melt cake is formed. The melt cake is then ... | 04/15/1986 |
| 4483819 | Production of highly capacitive agglomerated valve metal powder and valve metal electrodes for the production of electrolytic capacitors A process for the production of agglomerated valve metal powder which comprises heating an admixture of a valve metal powder and a reducing agent in the presence of an inert gas or under high vacuum for a sufficient time and at a sufficiently elevated tem... | 11/20/1984 |
| 4409020 | Recovery of metals from grinding sludges Metal values, such as Co, Ni, Cu and Fe, are recovered from magnet alloy grinding sludge by means of a process comprising: (1) treatment with an organic solvent to remove a major portion of sulfur and oil contaminants, (2) drying, grinding, sizing and mag... | 10/11/1983 |
| 4406693 | Method for refining contaminated iridium Contaminated iridium is refined by alloying it with an alloying agent selected from the group consisting of manganese and an alloy of manganese and copper, and then dissolving the alloying agent from the formed alloy to provide a purified iridium powder.... | 09/27/1983 |
| 4397682 | Process for preparing metals from their fluorine-containing compounds A process for preparing high purity superfine powders of less than 0.5μ diameter of Mo, W, Nb, Zr, Cu, Zn, Co, Ni and In by first producing their fluoride or a double fluoride with ammonium and then decomposing them under heat in a hydrogen-containing st... | 08/09/1983 |
| 4388109 | Process for the production of silver powder from silver chloride, sulphate or sulphide A process for the production of elemental silver from silver chloride, silver sulphate or silver sulphide includes mixing the silver salt with sodium carbonate, and heating the mixture at a temperature in the range of from about 500° C. to about 650° C.... | 06/14/1983 |
| 4356028 | In situ phosphorus addition to tantalum During the method of preparing tantalum powder from a tantalum rich solution in an organic solvent in which a tantalum salt is precipitated from the tantalum rich solvent and the tantalum salt is reduced to metalic tantalum by an alkali metal, a phosphoru... | 10/26/1982 |
| 4347165 | Conductor powders Nickel powders having an improved chemical stability are formed by reaction with an electroconductive coating such as a carbide, a silicide, or the like and, also, a reaction with sulfur.... | 08/31/1982 |
| 4338126 | Recovery of tungsten from heavy metal alloys Tungsten is reclaimed from heavy metal alloys of the type having tungsten metal dispersed throughout a matrix material by treating the heavy metal alloy with zinc to form a molten mixture and separating the zinc from the resulting alloy.... | 07/06/1982 |
| 4306902 | Process for the production of elemental silver from silver chloride or silver sulphate A process for the production of elemental silver from silver chloride or silver sulphate includes mixing the silver salt with sodium carbonate, and heating the mixture at a temperature in the range of from about 500° C. to about 650° C. to produce eleme... | 12/22/1981 |
| 4218507 | Coated particles and process of preparing same Novel powders, and resinous compositions bearing said powders, characterized by excellent chemical stability, electrical conductivity, and energy-absorbing characteristics. These three characteristics can be utilized, alone or combination, in forming many... | 08/19/1980 |
| 4148632 | Treatment of dissolved basic nickel carbonate to obtain nickel A process for recovering nickel from an impure nickel compound which contains a major proportion of nickel values and a minor proportion of other metal values which are relatively soluble in ammoniacal ammonium sulphate solution, and a minor proportion of... | 04/10/1979 |
| 4141720 | Tantalum powder reclaiming Tantalum powders which have high oxygen, high sodium contents are reclaimed for practical applications by treating said powders with selected fused salt compositions. This process converts normally unleachable sodium metatantalate, recognized herein as a ... | 02/27/1979 |
| 4101309 | Method for preparing tungsten materials A method for preparing tungsten materials in which tungsten powder obtained by reducing tungsten oxides having doping agents added thereto is washed first with hydrochloric acid having a concentration of not lower than 4% by weight and then with hydrofluo... | 07/18/1978 |
| 4070183 | Methods of separating and recovering copper from materials containing copper Cuprous sulphate solutions, suitable for thermal or electrochemical disproportionation to yield copper, are obtained by dissolving copper sulphites, such as Chevreul's salt or cuprous ammonium sulphite, in acetonitrile-water or 2 hydroxycyanoethane-water ... | 01/24/1978 |
