Mixture Contains Particles Of Nonmetal Patents (Class 75/252)
  • Patent number: 6939619
    Abstract: A metal powder is formed by the steps of preparing a reducing agent solution, preparing a mixed metallic salt solution by dissolving a nickel salt and a copper salt in a solvent, and mixing the reducing agent solution and the mixed metallic salt solution so that the copper salt is reduced to precipitate copper particle nuclei and then the nickel salt is reduced to precipitate nickel around the copper particle nuclei. A metal power produced by this production method, a conductive paste containing the metal powder and a monolithic ceramic electronic component in which internal electrodes are formed using the conductive paste are also disclosed.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: September 6, 2005
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tadasu Hosokura, Atsuyoshi Maeda
  • Patent number: 6887295
    Abstract: The present invention relates to improved metallurgical powder compositions that incorporate solid lubricants, methods for preparing and using the same, and methods of making compacted parts. Ejection properties, such as stripping pressure and sliding pressure, of compacted parts can be improved by using the solid lubricants. The solid lubricants contain functionalized polyalkylene glycol lubricants that contain a phosphate group, phosphite group, hypophosphate group, hypophosphite group, polyphosphate group, thiophosphate group, dithiophosphate group, thiocarbamate group, dithiocarbamate group, borate group, thiosulfate group, sulfate group, a sulfonate group or combinations thereof.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: May 3, 2005
    Assignee: Hoeganaes Corporation
    Inventors: George Poszmik, Sydney Luk
  • Patent number: 6884277
    Abstract: The present invention relates to a powdered niobium for a capacitor, characterized in that the content of each of the elements such as iron, nickel, cobalt, silicon, sodium, potassium and magnesium is about 100 ppm by weight or less or that the total content thereof is about 350 ppm by weight or less is used, a sintered body thereof, a sintered body comprising niobium monoxide crystal and/or diniobium mononitride crystal, a capacitor using the sintered body and the production method of the capacitor. A capacitor using the above described niobium sintered body has a large capacity per the unit weight, a good specific leakage current value and excellent high temperature property.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: April 26, 2005
    Assignee: Showa Denko K.K.
    Inventor: Kazumi Naito
  • Patent number: 6881239
    Abstract: An ultrafine metal powder slurry with high dispersibility includes an organic solvent; a surfactant having a hydrophilic group and a lipophilic group; and an ultrafine metal powder in an amount more than 60% by mass and less than 95% by mass. In the slurry, the hydrophilic group of the surfactant is at least one selected from a sulfonato group, sulfo group, sulfonyldioxy group, polyoxyethylene group with carboxyl group, and polyoxyethylene group with phosphate group, and the lipophilic group is an alkyl containing 12 or more carbon atoms or an alkylphenyl. The ultrafine metal powder slurry includes no aggregated particles, exhibits good dispersibility and is useful as a metal material for conductive pastes. The slurry can save a part of process steps in conventional conductive paste production processes, can shorten a process time and can save in labor.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: April 19, 2005
    Assignee: Kawatetsu Mining Co., Ltd.
    Inventor: Morishige Uchida
  • Patent number: 6881240
    Abstract: When copper powder manufactured by a wet reduction method is kneaded with resin in a high filling rate, it is difficult to maintain a low viscosity. The invention is to solve the problem of high viscosity without changing the characteristics such as particle size and specific surface area of the copper powder obtained by a wet reduction method. This invention relates to copper powder for an electrically conductive paste wherein copper powder manufactured by a wet reduction method is subjected to a surface-flattening treatment in which the particles are mechanically collided each other.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: April 19, 2005
    Assignee: Dowa Mining Co., Ltd.
    Inventors: Kazushi Sano, Yoshihiro Okada, Hiromasa Miyoshi
  • Patent number: 6878182
    Abstract: The present invention relates to economic and environment-friendly slurries and their preparation, handling, and spray drying for the production of cemented carbide based hard metals. The slurry is ethanol-water based and contains metallic and metal carbide raw materials as well as polyethylene glycol (PEG) and a very low concentration of polyethylenimine (PEI). The concentration of PEI is 0.01-<0.1% of the raw material weight. As a result, low-viscous slurries are produced which require less use of ethanol, energy, manpower and equipment time in their preparation, handling, and spray drying.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: April 12, 2005
    Assignee: Seco Tools AB
    Inventor: Olof Kruse
  • Patent number: 6876542
    Abstract: A nitrogen containing metal powder wicth a large specific surface area, and containing a suitable quantity of nitrogen dispersed uniformly within the metal is produced with good productivity, and provides a solid electrolytic capacitor with a high capacitance, minimal leakage current, and excellent long term reliability. This nitrogen containing metal powder has a ratio W/S between the nitrogen content W [ppm] of the powder, and the specific surface area S [m2/g], as measured by a BET method, that falls within a range from 500 to 3000. This type of powder can be produced by a process in which a metal salt containing the metal is reacted with a reducing agent and undergoes reduction within a diluent salt, thereby generating the metal, wherein a nitrogen containing gas is introduced into the space contacting the reaction melt comprising the metal salt, the reducing agent and the diluent salt, thereby generating the metal and incorporating the nitrogen within the metal.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: April 5, 2005
    Assignee: Cabot Supermetals K.K.
    Inventors: Yukio Oda, Isayuki Horio
  • Patent number: 6872235
    Abstract: The invention concerns a method of preparing an iron-based powder comprising the steps of mixing and heating an iron-based powder, at least one oligomer amide type lubricant, at least one fatty acid and optionally one or more additives to a temperature above the melting point of the lubricant and subsequently cooling the obtained mixture. The invention also comprises the mixture of the iron-based powder, the oligomer amide type lubricant and the fatty acid.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: March 29, 2005
    Assignee: Höganäs AB
    Inventor: Björn Johansson
  • Patent number: 6860918
    Abstract: The surface of the body of powder additive for use in powder metallurgy is coated with an organic binder, thereby obtaining powder additive to cause adhesion of the powder additive to the surface of iron-based powder by the organic binder, thereby providing a powder additive with no segregation of components and excellent flowability and compression, and an iron-based powder mixture manufactured by mixing the powder additive and the iron-based powder.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: March 1, 2005
    Assignee: JFE Steel Corporation
    Inventors: Yukiko Ozaki, Shigeru Unami, Satoshi Uenosono
  • Patent number: 6850406
    Abstract: An Nb solid electrolytic capacitor is disclosed which comprises: an anode body made from an Nb-based material, the anode body having a nitrogen content of about 7,500 ppm to about 47,000 ppm; a dielectric layer formed over the surface of the anode body; a solid electrolyte layer formed on the dielectric layer; and a cathode body formed on the surface of the solid electrolyte layer. The Nb solid electrolytic capacitor shows small bias dependence. A method for preparing the same is also disclosed which comprises steps of: forming an anode body from an Nb-based material, the anode body having a nitrogen content of about 7,500 ppm to about 47,000 ppm; forming a dielectric layer over the surface of the anode body; forming a solid electrolyte layer on the dielectric layer; and forming a cathode body on the electrolyte layer.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: February 1, 2005
    Assignee: NEC Tokin Corporation
    Inventors: Tadamasa Asami, Katsuhiro Yoshida, Kunihiko Shimizu, Takashi Kono
  • Patent number: 6849103
    Abstract: Disclosed is a rapidly expanding metallic mixture treated for oxidation prevention thereof at room temperature, comprising a metal salt and a metal powder, which prevents its spontaneous explosion due to oxidation of the metal powder in the mixture at room temperature during storage, or dysfunction of the mixture upon blasting work because of altered mixing ratios between the metal salt and the metal powder. The rapidly expanding metallic mixture is characterized in that the mixture is added with a water repellent such as oil or an inorganic preservative, or is coated with a resin and formed to the size of 0.1-100 mm3.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: February 1, 2005
    Inventor: Chang Sun Kim
  • Patent number: 6840979
    Abstract: A clay composition for shaping noble metal is formed of a kneaded mixture of a mixed powder of noble metal having as main components thereof 30 to 70% by weight of a powder having an average particle diameter in the range of 2.2 to 3.0 ?m and 70 to 30% by weight of a powder having an average particle diameter in the range of 5 to 20 ?m with an aqueous solution of an organic binder.
    Type: Grant
    Filed: November 5, 2003
    Date of Patent: January 11, 2005
    Assignee: AIDA Chemical Industries Co., Ltd.
    Inventors: Atsushi Fujimaru, Akiyoshi Yatsugi, Tomoaki Kasukawa
  • Patent number: 6833018
    Abstract: A method of forming a powder metal material includes molding a compact from a powder mix comprising an iron-containing powder and glass, and subsequently sintering the compact. Also disclosed is a sintered powder metal material including iron and glass.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: December 21, 2004
    Assignee: Keystone Investment Corporation
    Inventor: John C. Kosco
  • Patent number: 6827757
    Abstract: A magnetite-iron based composite powder includes magnetite with a ratio of X-ray diffraction intensity to that of &agr;-Fe of about 0.001 to about 50 and has an average primary particle size of about 0.1 to about 10 &mgr;m. The composite powder can highly dehalogenate organic halogen compounds and exhibits satisfactory absorption power of high frequency electromagnetic waves after molding. An ultrafine nonferrous inorganic compound powder may adhere to the surface of the composite powder, or at least the composite powder may adhere to the surfaces of small particles of a nonferrous inorganic compound to thereby yield a composite powder composition. The composite powder can be produced by partial reduction of a material powder containing a hematite based powder or by complete reduction and subsequent partial oxidation of the material powder.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: December 7, 2004
    Assignee: JFE Steel Corporation
    Inventors: Yukiko Ozaki, Satoshi Uenosono, Hiroki Nakamaru, Yukiko Nakamura, Shigeaki Takajo, Shigeru Unami, Shingo Saito
  • Publication number: 20040234407
    Abstract: The present invention concerns a powder metal composition for producing powder metal components comprising a Co-based pre-alloyed powder, with irregularly shaped particles comprising at least 15% by weight Cr and less than 0.3% by weight C, admixed with graphite.
    Type: Application
    Filed: March 17, 2004
    Publication date: November 25, 2004
    Applicant: HOGANAS AB
    Inventors: Christophe Szabo, Owe Mars
  • Publication number: 20040226404
    Abstract: A magnetite-iron based composite powder includes magnetite with a ratio of X-ray diffraction intensity to that of &agr;-Fe of about 0.001 to about 50 and has an average primary particle size of about 0.1 to about 10 &mgr;m. The composite powder can highly dehalogenate organic halogen compounds and exhibits satisfactory absorption power of high frequency electromagnetic waves after molding. An ultrafine nonferrous inorganic compound powder may adhere to the surface of the composite powder, or at least the composite powder may adhere to the surfaces of small particles of a nonferrous inorganic compound to thereby yield a composite powder composition. The composite powder can be produced by partial reduction of a material powder containing a hematite based powder or by complete reduction and subsequent partial oxidation of the material powder.
    Type: Application
    Filed: June 10, 2004
    Publication date: November 18, 2004
    Applicant: JFE Steel Corporation, a corporation of Japan
    Inventors: Yukiko Ozaki, Satoshi Uenosono, Hiroki Nakamaru, Yukiko Nakamura, Shigeaki Takajo, Sawae Takajo, Shigeru Unami, Shingo Saito
  • Publication number: 20040226405
    Abstract: A powder blend for use in laser sintering and a method for forming tough, strong, wear-resistant, corrosion-resistant infiltrated metal products are provided. The powder blend comprises a steel alloy, a polymeric binder and a high melting temperature fine particulate which are blended together, then applied layer by layer to a working surface in a laser sintering system, exposed a layer at a time to fuse together the powder until a green part of high strength is formed, and then the green part is infiltrated with a metal infiltrant in a non-reducing gas atmosphere at an effective temperature for an effective period of time. The preferred steel is a mild steel alloy.
    Type: Application
    Filed: June 14, 2004
    Publication date: November 18, 2004
    Applicant: 3D Systems, Inc.
    Inventors: Brad Geving, Kris Alan Schmidt, Kenneth J. Newell
  • Patent number: 6818041
    Abstract: Magnetic alloy powder for a permanent magnet contains: R of about 20 mass percent to about 40 mass percent (R is Y, or at least one type of rare earth element); T of about 60 mass percent to about 79 mass percent (T is a transition metal including Fe as a primary component); and Q of about 0.5 mass percent to about 2.0 mass percent (Q is an element including B (boron) and C (carbon)). The magnetic alloy powder is formed by an atomize method, and the shape of particles of the powder is substantially spherical. The magnetic alloy powder includes a compound phase having Nd2Fe14B tetragonal structure as a primary composition phase. A ratio of a content of C to a total content of B and C is about 0.05 to about 0.90.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: November 16, 2004
    Assignee: Neomax Co., Ltd
    Inventors: Hiroyuki Tomizawa, Yuji Kaneko
  • Publication number: 20040221682
    Abstract: Novel powders or particles are formed by associating them with relatively small proportions of hydrolysable liquid material. The resulting particle/liquid mass is placed in a mold and sintered under conditions of heat and pressure that enables at least some of the hydrolysable liquid to react within the sintered mass. The sintered mass displays a controllable range of properties such as increased density, increased tensile strength, and improved natural polish finish. The hydrolysable liquid may partially hydrolyze and/or react with the powders and particles, but the liquid is not completely (not 100%) reduced to an inorganic oxide prior to introduction to the mold and performance of the sintering process.
    Type: Application
    Filed: May 8, 2003
    Publication date: November 11, 2004
    Applicant: Particle Sciences, Inc.
    Inventors: Garry Gwozdz, Mark Mitchnick, David Fairhurst
  • Publication number: 20040221683
    Abstract: A metal powder composed of nickel or an alloy thereof and used for a producing a conductivity-afforded material is provided, in which particles are integrated in particle aggregates having a chain structure. The average diameter of the particle aggregates is in the range of 30 to 200 nm, and the average length thereof is in the range of 0.5 to 50 &mgr;m. The increased conductivity bestowing effect can be obtained by the addition of a small amount of the metal powder.
    Type: Application
    Filed: February 23, 2004
    Publication date: November 11, 2004
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Kohei Shimoda, Masatoshi Majima, Keiji Koyama, Issei Okada, Tetsuya Kuwabara
  • Publication number: 20040200318
    Abstract: Provided are a method for preparing metallic nickel powders capable of decreasing the content of an alkaline metal in the metallic nickel powders, metallic nickel powders with the low content of an alkaline metal, a conductive paste including metallic nickel powders with the low content of an alkaline metal, and a multi-layer ceramic capacitor (MLCC) including a nickel inner electrode with the low content of an alkaline metal. The method for preparing the metallic nickel powders includes heating a mixture including an organic base, a nickel precursor compound, and a polyol. Wherein, the nickel precursor compound is converted to the metallic nickel powders through reduction by the organic base and the polyol. In the method, the organic base is used instead of the hydroxide of an alkaline metal such as NaOH and KOH. Therefore, the content of an alkaline metal such as sodium and potassium that can be incorporated as an impurity into the metallic nickel powders can be significantly reduced.
    Type: Application
    Filed: April 8, 2004
    Publication date: October 14, 2004
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Soon-ho Kim, Jae-young Choi, Do-kyung Kim, Je-hyeong Park
  • Publication number: 20040188659
    Abstract: The present invention provides a conductor composition that is prepared in the form of an ink or a paste and is for forming conductor films having excellent heat resistance on a piezoelectric ceramic material. This composition comprises a platinum powder that is a principal conductor-forming component, and a rare earth oxide powder having a mean particle size in a range of approximately 10 to approximately 100 nm.
    Type: Application
    Filed: March 24, 2004
    Publication date: September 30, 2004
    Applicant: NORITAKE CO., LIMITED
    Inventors: Hideyuki Tomita, Atsushi Nagai
  • Publication number: 20040182202
    Abstract: A powder blend for use in laser sintering and a method for forming tough, strong, wear-resistant, corrosion-resistant infiltrated metal products are provided. The powder blend comprises a steel alloy, a polymeric binder and a high melting temperature fine particulate which are blended together, then applied layer by layer to a working surface in a laser sintering system, exposed a layer at a time to fuse together the powder until a green part of high strength is formed, and then the green part is infiltrated with a metal infiltrant in a non-reducing gas atmosphere at an effective temperature for an effective period of time. The preferred steel is a mild steel alloy.
    Type: Application
    Filed: March 2, 2004
    Publication date: September 23, 2004
    Applicant: 3D Systems, Inc.
    Inventors: Brad Geving, Kris Alan Schmidt, Kenneth J. Newell
  • Publication number: 20040182201
    Abstract: A three-dimensional object of a desired shape is made by irradiating an optical beam on a metal powder layer to form a sintered layer and by laminating such sintered layer one above another. A metal powder composition for use in making such a three-dimensional object includes an iron-based powder material, a nickel and/or nickel alloy powder material, a copper and/or copper alloy powder material, and a graphite powder material. The graphite powder material acts to enhance the wettability during melting and to reduce microcracks during solidification.
    Type: Application
    Filed: February 19, 2004
    Publication date: September 23, 2004
    Applicant: Matsushita Electric Works, Ltd.,
    Inventors: Isao Fuwa, Norio Yoshida, Shushi Uenaga, Toshiharu Iwanaga, Yoshikazu Higashi, Hirohiko Togeyama, Satoshi Abe, Masataka Takenami, Takashi Shimizu
  • Patent number: 6793705
    Abstract: A method of forming a powder metal material or article includes the steps of molding a compact from a metallurgical powder, and then sintering the compact. The metallurgical powder may include at least one of a stainless steel powder and a low-chromium steel-base powder, and about 0.5 to about 15 weight percent of glass powder. Alternatively, the metallurgical powder may include at least one of a stainless steel powder and a low-chromium steel-base powder, about 3 to about 15 weight percent molybdenum, and about 1 to about 15 weight percent of nickel-base alloy powder. The present invention also is directed to metallurgical powders useful in and materials and articles made by the methods of the present invention. Such articles include, but are not limited to, valve guides for internal combustion engine EGR systems, valve seats, exhaust system components, combustion chambers, other combustion engine parts subjected to high temperature, and chemical industry valve and corrosion parts.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: September 21, 2004
    Assignee: Keystone Investment Corporation
    Inventor: John C. Kosco
  • Publication number: 20040175286
    Abstract: The present invention provides a lubricant system in the pressing of powders to form a part. The lubricant system is a solid at ambient conditions. However, upon application of pressure during the pressing of the metal parts, the lubricant system forms a liquid phase along the walls of cavity in which the powder is being pressed. The lubricant system may also be used in connection with a polar powder thereby providing certain beneficial results.
    Type: Application
    Filed: January 26, 2004
    Publication date: September 9, 2004
    Applicant: Apex Advanced Technologies, LLC
    Inventor: Dennis L. Hammond
  • Publication number: 20040168547
    Abstract: The invention aims to provide a binder for powder metallurgy, the binder containing an epoxy resin which is liquid at room temperature and a curing agent having at least one functional group selected from the group consisting of amino, mercapto and carboxyl groups. The binder involves few problems in point of workability and safety, suppress the scattering of graphite, and is superior in powder characteristics. The invention also provides a mixed powder for powder metallurgy using the binder and a method for producing the mixed powder.
    Type: Application
    Filed: February 23, 2004
    Publication date: September 2, 2004
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Kazuhisa Fujisawa, Hironori Suzuki
  • Publication number: 20040144207
    Abstract: A powder metal mixture comprises a lubricant powder conventionally used to produce powder metal parts in combination with micronized cellulose fibers in an amount less than 2% by weight of the mixture. The addition of fibers with the lubricant increases green strength of a part made by compacting the mixture and improves dimensional conformance.
    Type: Application
    Filed: January 14, 2004
    Publication date: July 29, 2004
    Inventors: Bruce Anthony Tavares, Bart Jerome Nelson
  • Publication number: 20040144206
    Abstract: A powder metal mixture comprises a lubricant powder conventionally used to produce powder metal parts in combination with a modified lubricant. A lubricant conventionally used to compact and sinter a chosen powder metal mixture is modified by adding to it starch particles smaller than the average metal particle, and optionally, micronized cellulose fibers in so small an amount that the modified lubricant is present in an amount less than 2% by weight of the mixture. The Hall apparent density and the Hall flow rate of a powder metal mixture made with the modified lubricant of starch or (starch+fibers) remains within the ranges deemed desirable for production of compacted powder metal parts. Using the modified lubricant in lieu of the conventional lubricant increases green strength of a part made by compacting the mixture and improves dimensional conformance.
    Type: Application
    Filed: January 14, 2004
    Publication date: July 29, 2004
    Inventors: Bruce Anthony Tavares, Bart Jerome Nelson
  • Publication number: 20040144205
    Abstract: The present invention relates to terminal electrode compositions for multilayer ceramic capacitors. More specifically, it relates to terminal electrode compositions for multilayer ceramic capacitors which have a metal oxide component selected from SnO2, V2O5 and MoO3. The compositions can be fired at a low temperature in a nitrogen atmosphere.
    Type: Application
    Filed: September 25, 2003
    Publication date: July 29, 2004
    Inventors: Hisashi Matsuno, Hiroyuki Soshi
  • Publication number: 20040139820
    Abstract: 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 particles in a continuous manner.
    Type: Application
    Filed: January 16, 2004
    Publication date: July 22, 2004
    Inventors: Toivo T. Kodas, Mark J. Hampden-Smith, James Caruso, Daniel J. Skamser, Quint H. Powell, Clive D. Chandler
  • Patent number: 6765786
    Abstract: A niobium powder is provided for producing a niobium capacitor enhanced in the thermal stability of oxide films on niobium, with less leak current and less deterioration of leak current after application of thermal loads. The niobium powder contains form 0.005 to 0.10 mass % of hydrogen and from 0.002 to 5 mass % of sulfur and, further preferably, one or both of magnesium and aluminum in an amount from 0.002 to 1 mass % in total. The specific surface area of the powder is 1 to 10 m2/g and the average particle diameter of the secondary particles is 10 to 200 &mgr;m.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: July 20, 2004
    Assignee: Kawatetsu Mining Co., Ltd.
    Inventors: Tadasu Kirihara, Nobuyuki Sato, Osamu Ebato, Kan Saito
  • Publication number: 20040129112
    Abstract: Metal-containing materials, as well as their preparation and use are disclosed. The metal-containing material can be, for example, an antimicrobial material, an anti-biofilm material, an antibacterial material, an anti-inflammatory material, an anti-fungal material, an anti-viral material, an anti-cancer material, a pro-apoptosis material, anti-proliferative, MMP modulating material, an atomically disordered, crystalline material, and/or a nanocrystalline material. In certain embodiments, the metal-containing material is an atomically disordered, nanocrystalline silver-containing material.
    Type: Application
    Filed: October 22, 2003
    Publication date: July 8, 2004
    Inventors: Scott H. Gillis, Paul Schechter, James Alexander Robert Stiles
  • Patent number: 6755884
    Abstract: A niobium powder for capacitors, having an average particle size of from 10 to 500 &mgr;m, which is a granulated powder having an oxygen content of 3 to 9% by mass; a sintered body thereof; and a capacitor fabricated from the sintered body as one part electrode, a dielectric material formed on the surface of the sintered body, and another part electrode provided on the dielectric material. A capacitor manufactured from the sintered body of a niobium powder of the present invention is prevented from deterioration in the performance for a long period of time and has high reliability.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: June 29, 2004
    Assignee: Showa Denko K.K.
    Inventors: Kazumi Naito, Nobuyuki Nagato
  • Patent number: 6755885
    Abstract: A powder composition for warm compaction comprising an iron-based powder and a lubricant powder consisting essentially of an amide described by the following formula D—Cm—B—A—B—Cm—D wherein D is —H, COR, CNHR, wherein R is a straight or branched aliphatic or aromatic group including 2-21 C atoms; C is the group —NH (CH)n CO—; B is amino or carbonyl; A is alkylene having 4-16 C atoms optionally including up to 4 O atoms m is an integer 1-10 and n is an integer 5-11.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: June 29, 2004
    Assignee: Hëganäs AB
    Inventors: Hilmar Vidarsson, Per Knutsson
  • Publication number: 20040112174
    Abstract: A powder material for forming an abradable coating, the material comprising a metal powder based for the most part on aluminum and containing manganese or calcium. The material is applicable to seals of a turbomachine.
    Type: Application
    Filed: December 5, 2003
    Publication date: June 17, 2004
    Applicant: SNECMA MOTEURS
    Inventors: Philippe Le Biez, Philippe Perruchaut, Karim Larabi, Pierre Bertrand, Christian Coddet
  • Publication number: 20040093984
    Abstract: An aluminothermic reduction mixture includes aluminum powder and iron oxide formed of ferric oxide (Fe2O3) particles with a special shape and other constituent parts.
    Type: Application
    Filed: November 14, 2002
    Publication date: May 20, 2004
    Inventor: Robert Henry Kachik
  • Patent number: 6737035
    Abstract: A high-surface-area heterogenite (HCoO2) material is described for use in making submicron cobalt metal powders. The HCoO2 material has a surface area of at least about 90 M2/g and is preferably produced by dehydrating a cobalt hydroxide precipitate at 110° C.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: May 18, 2004
    Assignee: Osram Sylvania Inc.
    Inventors: Raj P. Singh, Robert G. Mendenhall
  • Publication number: 20040089100
    Abstract: A nitrogen containing niobium powder is disclosed as well as electrolytic capacitors formed from the niobium powders. Methods to reduce DC leakage in a niobium anode are also disclosed.
    Type: Application
    Filed: June 30, 2003
    Publication date: May 13, 2004
    Inventor: James A. Fife
  • Patent number: 6733565
    Abstract: A technique for producing compacted graphite iron utilizes agglomerations, such as briquettes or tablets that include a sulfur-containing material such as iron sulfide. The agglomerations are free of chemical binders and utilize iron and aluminum metal powders and pressure for compaction on either roll presses or tablet machines. Addition of metal powders provides rapid dissolution of the alloy and improved heat transfer. Iron sulfide agglomerations also provide consistent and improved sulfur recoveries compared to granulated iron sulfide additions with little to no sulfur odor.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: May 11, 2004
    Inventor: Rodney L. Naro
  • Publication number: 20040079193
    Abstract: Disclosed are provides conductive metal particles and conductive composite metal particles by which conductive materials having stable conductivity can be provided, and applied product thereof.
    Type: Application
    Filed: September 15, 2003
    Publication date: April 29, 2004
    Applicant: JSR Corporation
    Inventors: Terukazu Kokubo, Naoki Yanadori
  • Publication number: 20040079192
    Abstract: The present invention relates to improved metallurgical powder compositions that incorporate solid lubricants, methods for preparing and using the same, and methods of making compacted parts. Ejection properties, such as stripping pressure and sliding pressure, of compacted parts can be improved by using the solid lubricants. The solid lubricants contain functionalized polyalkylene glycol lubricants that contain a phosphate group, phosphite group, hypophosphate group, hypophosphite group, polyphosphate group, thiophosphate group, dithiophosphate group, thiocarbamate group, dithiocarbamate group, borate group, thiosulfate group, sulfate group, a sulfonate group or combinations thereof.
    Type: Application
    Filed: October 25, 2002
    Publication date: April 29, 2004
    Inventors: George Poszmik, Sydney Luk
  • Publication number: 20040081574
    Abstract: The present invention relates to improved metallurgical powder compositions that incorporate solid lubricants, methods for preparing and using the same, and methods of making compacted parts. The solid lubricants contain functionalized polyalkylene lubricants substituted with functional groups selected from the group consisting of a phosphate group, phosphite group, hypophosphate, hypophosphite, polyphosphate, thiophosphate, dithiophosphate, thiocarbamate, dithiocarbamate, borate, thiosulfate, sulfate group, or sulfonate group.
    Type: Application
    Filed: October 25, 2002
    Publication date: April 29, 2004
    Inventors: George Poszmik, Sydney Luk
  • Patent number: 6726741
    Abstract: Aluminum powder, neutron absorber, and third particle composed of oxide, nitride, carbide or boride are mixed, and preformed by cold isostatic pressing (CIP). Successively, by canning the preformed material, this preformed material is sintered by hot isostatic pressing (HIP). After sintering, the can outside and end face are machined by grinding, and the billet is taken out. Square pipes are formed by extruding this billet.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: April 27, 2004
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kazuo Murakami, Kazumi Ogura, Toyoaki Yasui
  • Patent number: 6726780
    Abstract: There is provided a lead-free solder which makes it possible to reliably and accurately perform the inspection of various kinds of defective soldering in the inspection using an image inspection apparatus after the reflow soldering. According to this lead-free solder, the delustering of the metallic luster of fillet is realized in order to minimize the probability of generating a dark portion at the area where no defective soldering is existed and instead to increase the area of whitish portion which can be generated through the irregular reflection of beam. Specifically, this invention provides a lead-free solder comprising an Sn—Ag—Cu-based lead-free solder containing a small quantity of Bi and Sb as an element which is capable of generating a delustering component for minimizing metallic luster of the fillet.
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: April 27, 2004
    Assignee: Tamura Kaken Corporation
    Inventors: Takao Ono, Mitsuru Iwabuchi, Kenji Fujimori, Hiroaki Koyahara
  • Patent number: 6716389
    Abstract: A process for producing sintered pellets made from blends of refractory metal and refractory metal nitride powders were found to have a higher fraction of intra-agglomerate pores than those made from the refractory metal or refractory metal nitride alone resulting in improved capacitor grade powders, anodes and finished capacitors therefrom. The pellet porosity and total intrusion volume maximizes when the mixture is in the 50-75 W/W % refractory metal nitride range. The total pellet pore surface area was found to be relatively independent of refractory metal nitride concentration above 50%. A substrate consisting of a 50/50 or 25/75 W/W % refractory metal/refractory metal nitride powder mixture should produce solid capacitors with higher capacitance recovery and lower ESR.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: April 6, 2004
    Assignee: H. C. Starck Inc
    Inventors: Terrance B. Tripp, Barbara L. Cox
  • Patent number: 6712873
    Abstract: The invention concerns a composition for warm compaction comprising a composition comprising a water-atomised standard stainless steel powder including, in addition to iron and 10-30% by weight of chromium, optional alloying elements and inevitable impurities, 0.8%-2.0% by weight of a warm compaction lubricant.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: March 30, 2004
    Assignee: Höganäs AB
    Inventors: Anders Bergkvist, Mikael Dahlberg
  • Publication number: 20040052678
    Abstract: A lead-free solder powder that can include a plurality of lead-free solder particles each having a general spherical shape with a diameter of 20-60 &mgr;m. Each of the lead-free solder particles can contain Sn, Ag and Bi, with respective concentrations set such that the lead-free solder alloy has a melting temperature lower than a predetermined heat-resistant temperature of a work to be soldered.
    Type: Application
    Filed: January 7, 2003
    Publication date: March 18, 2004
    Applicant: Fujitsu Limited
    Inventors: Masakazu Takesue, Yasuo Moriya, Yoshinori Nemoto, Yumiko Fukushima
  • Publication number: 20040045402
    Abstract: The invention relates to an inert electrode material in powder form comprising particles having an average particle size of 0.11 to 100 &mgr;m and each formed of an agglomerate of grains of a ceramic material and grains of a metal or alloy with each grain of ceramic material comprising a nanocrystal of the ceramic material and each grain of metal or alloy comprising a nanocrystal of the metal or alloy. Alternatively, each particle can be formed of an agglomerate of grains with each grain comprising a nanocrystal of a single phase ceramic material, a metal or an alloy. The electrode material in powder form according to the invention is useful for the manufacture of inert electrodes having improved thermal shock and corrosion resistance properties.
    Type: Application
    Filed: September 22, 2003
    Publication date: March 11, 2004
    Inventors: Sabin Boily, Houshang Darvishi Alamdari, Marco Blouin
  • Patent number: 6702870
    Abstract: The invention concerns a process permitting the preparation of a new powder, which as such or further processed is useful within a wide variety of different fields and which has magnetic and electric properties. The powder includes at least 0.5% by weight of iron containing silicate and at least 10% by weight of metallic iron and/or alloyed iron and is prepared by a process comprising the steps of mixing an iron containing powder and a silicon containing powder; and reducing the obtained mixture at a temperature above about 450° C.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: March 9, 2004
    Assignee: Höganäs AB
    Inventors: Lars Hultman, Nils Jonsson, Britt Benemark, Peter Grahn