Using Organometallic Or Organosilicon Intermediate Patents (Class 264/624)
  • Patent number: 9822040
    Abstract: Inventive manufacture of CrB2—Al2O3 composites is based on pressureless sintering. According to typical inventive practice, CrB2 powder and Al2O3 powder are mixed together in selected volumetric proportions so that the volume of the CrB2 does not exceed 50% of the overall volume of the CrB2—Al2O3 mixture. The CrB2—Al2O3 mixture is shaped into a green body. The green body is pressureless sintered in a non-oxidizing atmosphere at a firing temperature in the approximate range between 1600° C. and 2050° C. The present invention succeeds in preparing, via pressureless sintering, a proportionality-associated range of compositions in the CrB2—Al2O3 system, which is a potentially “advanced” ceramic system. A typical inventively fabricated CrB2—Al2O3 composite is inventively configured in a complex shape, and has “advanced” material (e.g., mechanical) properties that are favorable for a contemplated application.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: November 21, 2017
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Curtis A. Martin, James A. Zaykoski, Inna G. Talmy
  • Patent number: 9737383
    Abstract: To provide a zirconia sintered body having both excellent translucency and bending strength, specifically a zirconia sintered body having both translucency and strength suitable as a denture for front tooth, and a process for its production. A translucent zirconia sintered body containing more than 4.0 mol % and at most 6.5 mol % of yttria and less than 0.1 wt % of alumina, and having a relative density of at least 99.82%, a total light transmittance of at least 37% and less than 40% to light with a wavelength of 600 nm at a thickness of 1.0 mm, and a bending strength of at least 500 MPa, and a process for its production.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: August 22, 2017
    Assignee: TOSOH CORPORATION
    Inventors: Hiroyuki Fujisaki, Kiyotaka Kawamura
  • Patent number: 9726038
    Abstract: The invention relates to a process for producing an insulation element (12), which can be arranged radially above at least one guide vane (14) in a housing (10) of a thermal gas turbine. The insulation element (12) is produced from a solid body (24) provided with a metallic shell (26), the solid body (24) consisting at least partially of a ceramic material. The invention also relates to an insulation element (12), which can be arranged radially above at least one guide vane (14) in a housing (10) of a thermal gas turbine, and to an aero engine having a housing (10), in which at least one insulation element (12) is arranged radially above at least one guide vane (14).
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: August 8, 2017
    Assignee: MTU AERO ENGINES AG
    Inventors: Erwin Bayer, Thomas Hess, Sven-Juergen Hiller, Peter Geiger
  • Patent number: 9601641
    Abstract: A method and apparatus is disclosed for doping a semiconductor substrate with a dopant concentration greater than 1020 atoms per cubic centimeter. The method is suitable for producing an improved doped wide bandgap wafer for power electronic devices, photo conductive semiconductor switch, or a semiconductor catalyst.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: March 21, 2017
    Assignee: AppliCote Associates, LLC
    Inventors: Nathaniel R Quick, Michael C Murray
  • Patent number: 8961840
    Abstract: Methods, processes, and systems for producing bulk ceramics from agglomerations of partially cured gelatinous polymer ceramic precursor resin droplets, without using sponge materials to form gas pathways in the polymer bodies. Ceramics can be formed in hours. Resin droplets can be produced with a sprayer where liquid polymer precursors, mixed with a curing agent, are sprayed forming droplets which are partially cured, collected, and compressed into shapes. Ceramic porosity can be varied, droplet particle sizes can be controlled by adjusting liquid and gas pressure, orifice size, during spraying. Partially cured droplets can be formed via an emulsion process and size controlled by emulsion liquid and surfactant selection parameters.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: February 24, 2015
    Assignee: Dynamic Material Systems, LLC
    Inventors: Arnold Hill, William Easter
  • Patent number: 8887863
    Abstract: A mat member includes inorganic fibers, a first surface and a second surface opposite to the first surface. The first surface has a plurality of needle penetration marks and/or a plurality of needle protrusion marks. The second surface has a plurality of needle protrusion marks and/or a plurality of needle penetration marks. A plurality of needle marks are formed in the mat member by needle punching and extend from the needle penetration mark to the needle protrusion mark. An inorganic fiber bundle which includes a plurality of the inorganic fibers oriented in a closed loop configuration is formed at the needle protrusion mark.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: November 18, 2014
    Assignee: Ibiden Co., Ltd.
    Inventors: Takahiko Okabe, Daisuke Suzuki
  • Publication number: 20140124584
    Abstract: An RFID chip is embedded in a device having a body that includes a low-dielectric loss material including at least one of barium stannate, barium cerate, barium tungstate and barium molybdate.
    Type: Application
    Filed: September 24, 2013
    Publication date: May 8, 2014
    Applicant: Skyworks Solutions, Inc.
    Inventor: Michael David Hill
  • Publication number: 20140077425
    Abstract: The disclosure provides relates to compositions and methods for water treatment. It also addresses a method for synthesizing TiO2 (and other metal oxides) with or without dopants. This method enables control over size, phase, morphology and porosity and specific surface area of these materials. The disclosure also provides metal oxide composites that can be used in photocatalysts, photovoltaics, energy storage materials (e.g., Li-ion anodes), and solar hydrogen applications.
    Type: Application
    Filed: March 2, 2013
    Publication date: March 20, 2014
    Inventors: David Kisailus, Nichola Kinsinger
  • Publication number: 20140018483
    Abstract: The invention first relates to a feedstock for PIM, including a metal or ceramic powder; a polymeric binder; metallic or ceramic fibres or nanofibres, the fibres or nanofibres being metallic when the powder is metallic, and the fibres or nanofibres being ceramic when the powder is ceramic. It also relates to the method for producing such a feedstock, as well as the method for producing parts by means of powder injection moulding (PIM) using said feedstock.
    Type: Application
    Filed: September 19, 2013
    Publication date: January 16, 2014
    Applicant: Commissariat A L'Energie Atomique Et Aux Energies Alternatives
    Inventors: Luc FEDERZONI, Pascal REVIRAND
  • Patent number: 8496871
    Abstract: A silica structure includes mesoporous silica spheres; and connection portions each of which includes metal oxide, and each of which connects the mesoporous silica spheres to each other.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: July 30, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Narihito Tatsuda, Kazuhisa Yano, Takashi Sasajima, Daisaku Sawada, Eiichi Kamiyama
  • Publication number: 20130082426
    Abstract: A method for a fabricating a ceramic material includes providing a mixture of a reactive metallic filler material with a preceramic polysilazane material. The preceramic polysilazane material is then polymerized to form a green body. The green body is then thermally treated in an environment that is substantially free of oxygen to convert the polymerized preceramic polysilazane material into a ceramic material that includes at least one nitride phase that is a reaction product of the reactive metallic filler material and a preceramic polysilazane material.
    Type: Application
    Filed: September 30, 2011
    Publication date: April 4, 2013
    Inventors: Michael A. Kmetz, Timothy P. Coons, Justin W. Reutenauer
  • Patent number: 8409491
    Abstract: A tough ultra-high temperature ceramic (UHTC) composite comprises grains of UHTC matrix material, such as HfB2, ZrB2 or other metal boride, carbide, nitride, etc., surrounded by a uniform distribution of acicular high aspect ratio reinforcement ceramic rods or whiskers, such as of SiC, is formed from uniformly mixing a powder of the UHTC material and a pre-ceramic polymer selected to form the desired reinforcement species, then thermally consolidating the mixture by hot pressing. The acicular reinforcement rods may make up from 5 to 30 vol % of the resulting microstructure.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: April 2, 2013
    Assignee: The United States of America as Represented by the Administrator of the National Aeronautics & Space Administration (NASA)
    Inventors: Margaret M Stackpoole, Matthew J Gasch, Michael W Olson, Ian W. Hamby, Sylvia M Johnson
  • Patent number: 8399009
    Abstract: The invention provides a high performance porous bioceramic composite that has a high compression strength resulting from the ability to compression form a bioceramic precursor material and a pore forming agent under a high pressure load prior to sintering and/or removing the pore forming agent. Methods of making and using the same are also provided. Optionally, a biopolymer and/or therapeutic agent may be infused into the pores thereby forming the bioceramic composite.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: March 19, 2013
    Assignee: Warsaw Orthopedic, Inc.
    Inventors: Ian Robert Dunkley, Reginald William Smith
  • Publication number: 20120328879
    Abstract: The invention relates to a granulated powder intended, in particular, for the production of ceramic sintered parts, said powder having the following chemical weight composition, based on dry matter, namely: a zirconia stabilizer selected from the group containing Y2O3, Sc2O3, MgO, CaO, CeO2, and mixtures thereof, the weight content of stabilizer, based on the total zirconia and stabilizer content, being between 2% and 20% and the MgO+CaO content being less than 5% based on the total zirconia and stabilizer content; at least 1% of a first binder having a glass transition temperature less than or equal to 25° C.; 0-4% of an additional binder having a lass transition temperature greater than 25° C.
    Type: Application
    Filed: December 21, 2010
    Publication date: December 27, 2012
    Applicant: Saint-Gobian Centre De Recherches Et D'Etudes European
    Inventor: Nabil Nahas
  • Publication number: 20120289396
    Abstract: Disclosed is a method for making a refractory material from aluminum residues of aluminum recycling. At first, the aluminum residues is mixed with adhesive solution so that the percentage by weight of the adhesive solution is 5 wt % to 10 wt %. The mixture is granulated into grains. The grains are filled in a mold, pressed and then removed from the mold so that the grains are turned into a green body. The green body is heated in a furnace at a range of temperature from 1100° C. to 1400° C. so that the grains are sintered and become a refractory material.
    Type: Application
    Filed: May 12, 2011
    Publication date: November 15, 2012
    Applicant: ATOMIC ENERGY COUNCIL-INSTITUTE OF NUCLEAR ENERGY RESEARCH
    Inventors: Sheng -Fu Yang, Chun-Yen Yeh, Yen-Hua Chang, To-Mei Wang, Wen-Cheng Lee, Kin-Seng Sun, Chin-Ching Tzeng
  • Patent number: 8282878
    Abstract: Embodiments of the present invention disclosed herein include a sintering aid composition that has a material useful for sintering, an amine, and optionally a carboxylic acid.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: October 9, 2012
    Assignee: Huntsman Petrochemical LLC
    Inventors: Alan P. Croft, David C. Lewis
  • Publication number: 20120119420
    Abstract: A method of synthesising a nano metric composite which has a core and shell structure includes preparing isometric metal oxide cores with an average diameter of less than 100 nm by a growth process via a liquid route. A double surfactant method is used which includes a first surfactant to obtain mono dispersal of the metal oxide cores and then a second surfactant to prepare the surface of the metal oxide cores, thereafter grafting a shell on each core.
    Type: Application
    Filed: June 11, 2007
    Publication date: May 17, 2012
    Inventors: Fabrice Rossignol, Thierry Chartier, Wen Zhang, Cecile Pagnoux, Christophe Cueille, Adrian Sun Wai
  • Publication number: 20110104231
    Abstract: The invention provides a high performance porous bioceramic composite that has a high compression strength resulting from the ability to compression form a bioceramic precursor material and a pore forming agent under a high pressure load prior to sintering and/or removing the pore forming agent. Methods of making and using the same are also provided. Optionally, a biopolymer and/or therapeutic agent may be infused into the pores thereby forming the bioceramic composite.
    Type: Application
    Filed: November 29, 2010
    Publication date: May 5, 2011
    Applicant: WARSAW ORTHOPEDIC, INC.
    Inventors: Ian Robert DUNKLEY, Reginald William SMITH
  • Patent number: 7927501
    Abstract: A magnet comprising magnetic powder containing at least one rare earth metal element, and an oxide binder for binding the magnetic powder, wherein an inter-face distance of the binder determined by diffraction analysis is 0.25 to 2.94 nm. The disclosure also discloses a method of manufacturing a magnet comprising; compacting magnetic powder containing at least one rare earth element under pressure in a mold; impregnating the compacted magnetic powder molding with a precursor solution of an oxide material; and heat-treating the compacted magnetic molding impregnated with the precursor thereby to impart an inter-face distance determined by diffraction analysis to the binder in the compacted molding. The distance is 0.25 to 2.94 nm.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: April 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Matahiro Komuro, Yuichi Satsu, Takao Imagawa, Hiroyuki Suzuki
  • Patent number: 7915187
    Abstract: Disclosed is a highly-pure fine titanium carbide powder having a maximum particle size of 100 nm or less and containing metals except titanium in an amount of 0.05 wt % or less and free carbon in an amount of 0.5 wt % or less. The powder has a NaCl-type crystal structure, and a composition represented by TiCxOyNz, wherein X, Y and Z satisfy the relations: 0.5?X?1.0; 0?Y?0.3; 0?Z?0.2; and 0.5?X+Y+Z?1.0.) The powder is produced by: dissolving an organic substance serving as a carbon source in a solvent to prepare a liquid, wherein the organic substance contains at least one OH or COOH group which is a functional group coordinatable to titanium of titanium alkoxide, and no element except C, H, N and O; mixing titanium alkoxide with the liquid to satisfy the following relation: 0.7???1.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: March 29, 2011
    Assignees: Fukuoka Prefecture, Nippon Tungsten Co., Ltd.
    Inventors: Yoko Taniguchi, Teruhisa Makino, Kunitaka Fujiyoshi, Osamu Nakano, Toru Okui, Yusuke Hara
  • Patent number: 7910082
    Abstract: A method for preparing ordered mesoporous silicon carbide (OMSiC) nanocomposites uses an evaporation-induced self-assembly of a precursor composition that preferably includes a phenolic resin, pre-hydrolyzed tetraethyl orthosilicate, a surfactant, and butanol. The precursor mixture is dried, cross-linked and heated to form ordered mesoporous silicon carbide material having discrete domains of ordered, mesoscale pores.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: March 22, 2011
    Assignee: Corning Incorporated
    Inventors: Steven Bruce Dawes, Wageesha Senaratne
  • Publication number: 20100230870
    Abstract: A method for producing an aluminum titanate ceramic, which comprises subjecting, to forming, a raw material for aluminum titanate formation, containing Na2O-containing ?-alumina particles, to obtain a formed body and then firing the body, wherein the ?-alumina particles has such a crystal structure that the ratio of the average value of the average length in axis a direction and the average length in axis b direction, to the average length H in axis c direction is 3 or more.
    Type: Application
    Filed: February 18, 2010
    Publication date: September 16, 2010
    Applicant: NGK Insulators, Ltd.
    Inventors: Yasushi Noguchi, Atsushi Kaneda, Takayuki Inoue, Mariko Kusabe
  • Patent number: 7794557
    Abstract: A precursor tape casting method is one in which chemical precursors are converted into a final chemical phase from green tapes to products. Because chemical precursors are employed rather than the final powder materials, sintering is not required to form the material. Lower annealing temperatures instead of high temperature sintering allow the formation of grains of about 1 to about 100 nanometers in the final material. In addition, when the final material is a magnetic/insulator composite, improved magnetic properties may be obtained.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: September 14, 2010
    Assignee: Inframat Corporation
    Inventors: Shiqiang Hui, Yide Zhang, Danny Xiao, Mingzhong Wu
  • Patent number: 7781053
    Abstract: Provided are a silicon carbide-based porous article comprising silicon carbide particles as an aggregate, metallic silicon and an aggregate derived from organometallic compound particles to form pores through volume shrinkage due to decomposition/conversion by heat treatment; and a method for producing the silicon carbide-based porous article, comprising, adding organometallic compound particles to form pores through volume shrinkage due to decomposition/conversion by heat treatment to a raw-material mixture containing silicon carbide particles and metallic silicon, then forming into an intended shape, calcinating and/or firing the resultant green body, forming pores through volume shrinkage due to decomposition/conversion of the organometallic compound particles, and the decomposed/converted substance of the organometallic compound particles being present as an aggregate in the porous article.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: August 24, 2010
    Assignee: NGX Insulators, Inc.
    Inventors: Takuya Hiramatsu, Shinji Kawasaki
  • Patent number: 7708934
    Abstract: In a method for manufacturing a precursor ceramic by pyrolysis of elementorganic precursor polymers, carbon nanotubes are bonded to the precursor ceramic and the bonding is performed in such a way that the quantity of free carbon forming in the decomposition of the elementorganic precursor polymers is adjusted in such a way that there is a stoichiometric or moderately hypostoichiometric carbon concentration in the precursor ceramic.
    Type: Grant
    Filed: May 12, 2004
    Date of Patent: May 4, 2010
    Assignee: Robert Bosch GmbH
    Inventor: Martin Köhne
  • Patent number: 7687016
    Abstract: Methods are disclosed for producing architectural preforms and high-temperature composite structures containing high-strength ceramic fibers with reduced preforming stresses within each fiber, with an in-situ grown coating on each fiber surface, with reduced boron within the bulk of each fiber, and with improved tensile creep and rupture resistance properties for each fiber. The methods include the steps of preparing an original sample of a preform formed from a pre-selected high-strength silicon carbide ceramic fiber type, placing the original sample in a processing furnace under a pre-selected preforming stress state and thermally treating the sample in the processing furnace at a pre-selected processing temperature and hold time in a processing gas having a pre-selected composition, pressure, and flow rate.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: March 30, 2010
    Assignee: The United States of America as represented by the Administrator of National Aeronautics and Space Administration
    Inventors: James A. DiCarlo, Hee Yun
  • Publication number: 20090250850
    Abstract: A process of producing a ceramic powder including providing a plurality of precursor materials in solution, wherein each of the plurality of precursor materials in solution further comprises at least one constituent ionic species of a ceramic powder, combining the plurality of precursor materials in solution with an onium dicarboxylate precipitant solution to cause co-precipitation of the ceramic powder precursor in a combined solution; and separating the ceramic powder precursor from the combined solution. The process may further include calcining the ceramic powder precursor.
    Type: Application
    Filed: April 3, 2009
    Publication date: October 8, 2009
    Inventor: Wilfred Wayne Wilson
  • Publication number: 20090224442
    Abstract: A method of manufacturing a translucent ceramic is provided. The method comprises: mixing a raw powder and an organic binder and kneading them to obtain a compound, the raw powder containing an aluminum oxide powder and a magnesium oxide powder, and the organic binder containing a first organic component and a second organic component; molding the compound in a predetermined shape by an injection molding method to obtain a green body; debinding the organic binder contained in the green body to obtain a brown body; and sintering the brown body to obtain a sintered body of the translucent ceramic. When the softening point of the first organic component is defined as “T1” (° C.) and the softening point of the second organic component is defined as “T2” (° C.), the kneading step is carried out at a temperature in the range of T2 or higher but lower than T1 after the raw powder and the organic binder are preheated at a temperature in the range of T1 to T1+100(° C.). An orthodontic member is also provided.
    Type: Application
    Filed: March 4, 2009
    Publication date: September 10, 2009
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Masaaki SAKATA, Junichi HAYASHI, Hideki ISHIGAMI
  • Patent number: 7335331
    Abstract: Compositions and methods of making ceramic plates are described. The compositions are water-based slurries that include filler material, one or more clay components, one or more strength or processing additives, and/or a carbon source. The filler material can include a first grade of boron carbide having a relatively large average particle size, a second grade of boron carbide having an intermediate average particle size, a third grade of boron carbide having a fine average particle size, and/or a silicon carbide having a fine average particle size. The methods of the invention involve casting and drying the slurry to make a substantially dry preform, providing a silicon loaf having a solid form for supporting one or more preforms, placing the substantially dry preform on top of the silicon loaf inside of an infiltration furnace and heating the substantially dry preform and loaf to melt silicon within the loaf and infiltrate the perform to create a ceramic plate.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: February 26, 2008
    Inventors: Dana M. Husnay, Noah A. Nichelson
  • Patent number: 7306762
    Abstract: A process for foaming ceramic foams, in which the ceramic foams are produced from a precursor or a mixture of precursors which contain at least one ceramic-forming element and liberates at least one volatile reaction product during an inorganic gelation process. In one embodiment, foaming is based on a precursor containing crystals of the AlCl3(Pri2O) complex. The decomposition of the initial precursor produces polymerizing species dissolved in liquid isopropyl chloride. The solvent and growing AlOxCly(OPri)z species are mixed homogeneously so that the boiling point of the solution is raised above the boiling point of the pure isopropyl chloride. Polymerization takes place in the liquid until a critical polymer size is attained, whereupon a phase separation into polymer rich and solvent rich regions occurs. Since the expelled solvent is suddenly above its boiling point, bubbles start forming instantly.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: December 11, 2007
    Assignee: Cellaris Ltd.
    Inventors: Gideon Grader, Gennady Shter, Yoram Dehazan
  • Patent number: 7294598
    Abstract: A material made of a dielectric oxide of type Ca0.25Cu0.75TiO3 having a dielectric constant greater than 3,000.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: November 13, 2007
    Assignee: STMicroelectronics SA
    Inventors: Virginie Brize, Monique Gervais
  • Patent number: 7287573
    Abstract: A green product for use in fabricating a ceramic article comprises a ceramic powder immobilized within a silicone matrix, wherein the silicone matrix comprises one or more cross linked or polymerized silicone monomers and/or oligomers, wherein the one or more cross linked or polymerized silicone monomers and/or oligomers have a alkenyl reactive functional group and a hydride reactive functional group. Processes for forming a green product and a ceramic core with the silicone monomers and/or oligomers are also disclosed.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: October 30, 2007
    Assignee: General Electric Company
    Inventors: Thomas McNulty, John Leman
  • Patent number: 7163650
    Abstract: A process for producing ceramic bearing components in which a material mixture is produced from an organometallic compound as a preceramic precursor and from silicon in element form or in the form of an alloy as a chemically reactive filler. The material mixture is subjected to reaction pyrolysis for conversion into a ceramic material.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: January 16, 2007
    Assignee: AB SKF
    Inventor: Jürgen Gegner
  • Patent number: 7153465
    Abstract: There are disclosed inventions relating to tubular hybrid metal/ceramic composites and the methods of making them wherein the ceramic chosen has a lower thermal expansion than that of the metal.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: December 26, 2006
    Assignee: Thor Technologies, Inc.
    Inventors: Stuart T. Schwab, Kevin W. Dudek
  • Patent number: 7144545
    Abstract: The invention relates to a process for the production of ceramic bearing components in which a mixture of a metallo-organic compound and a chemically reactive filling substance is subjected to a pyrolysis reaction and the resulting product.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: December 5, 2006
    Assignee: AB SKF
    Inventor: Jürgen Gegner
  • Patent number: 7125514
    Abstract: A mixed polymer liquid is prepared by mixing a polycarbosilane-dissolved organic solvent with poly(methylsilane) and moderated to viscosity of 5–20 Pa·s by heat-treatment to promote partial cross-linking reaction. The mixed-polymer is then melt-spun to fiber at 250–350° C. The fiber is cured by treatment at 100–200° C. in an oxidizing atmosphere, and baked at 1000° C. or higher. Due to thermosetting action of poly(methylsilane), the mixed polymer liquid is continuously melt-spun without breakage, and SiC fiber produced in this way is useful for reinforcement of SiC composite excellent in toughness, strength and heat-resistance.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: October 24, 2006
    Assignee: Japan Science and Technology Corporation
    Inventors: Kiyohito Okamura, Masaki Narisawa, Masaki Nishioka, Takaaki Dohmaru, Kunio Oka, Yutai Katoh, Akira Kohyama
  • Patent number: 7022305
    Abstract: Nanoscale corundum powders are obtained by first producing an Al2O3 precursor by adding seed crystals to an aqueous solution of an aluminium compound and adding a base and then converting the Al2O3 precursor into corundum by calcination at a high temperature. Before the calcination, the salts that are present in addition to the Al2O3 precursor are separated off. The resulting product is calcined at temperatures of 700 to 975° C. and any fines that may be present are removed. The resulting corundum powders can be sintered at temperatures of ?1200° C. to produce compacts or components of multiple layer systems.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: April 4, 2006
    Assignee: Leibniz-Institut fuer neue Materialien Gemeinnuetzige GmbH
    Inventors: Robert Drumm, Christian Goebbert, Kai Gossmann, Ralph Nonninger, Helmut Schmidt
  • Patent number: 7008576
    Abstract: Microporous ceramic materials used in structural materials, high-temperature filters, electrode materials or preform materials for infiltration by homogeneously mixing and molding a ceramic precursor powder polymer. The powder is saturated by introducing fluid to a pressure vessel. The fluid is super saturated by adjusting pressure in the vessel. Micropores are formed in the molded bodies by evolving the fluid from the molded bodies by heating and hardening the molded bodies. The hardened molded bodies are heated to pyrolysis. Pore characteristics (e.g., pore size and pore size distribution) suitable to target materials are controlled by adjusting pressure at a non-critical state without requiring additional processes or devices.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: March 7, 2006
    Assignee: Korea Institute of Machinery and Materials
    Inventors: Hai-Doo Kim, Young-Wook Kim, Chul Bum Park
  • Patent number: 6860917
    Abstract: A method for making high temperature filter media is provided by melt-spinning a plurality of fibers of preceramic thermoplastic polymer to form a nonwoven textile web of the fibers, curing and cross-linking the thermoplastic polymer to a thermoset polymer, and thermally decomposing the thermoset polymer to ceramic. Between the melt-spinning step and the curing step, the web is formed to a filter pre-form in a green state while still pliable and malleable. The filter pre-form is cured without re-melting the thermoplastic polymer and without destroying morphology.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: March 1, 2005
    Assignee: Fleetguard, Inc.
    Inventors: Matthew P. Henrichsen, William C. Haberkamp, Gene A. Mullins, Jr.
  • Publication number: 20040253279
    Abstract: An aqueous dispersion of ceramic particles and containing a polymerisable monomer was foamed before polymerisation, e.g., using a catalyst and initiator, was started.
    Type: Application
    Filed: April 8, 2004
    Publication date: December 16, 2004
    Applicant: Dytech Corporation Limited
    Inventors: Robert Terence Smith, Rodney Martin Sambrook
  • Publication number: 20040238999
    Abstract: Processes for mechanically fabricating two and three-dimensional fibrous monolith composites include preparing a fibrous monolith filament from a core composition of a first powder material and a boundary material of a second powder material. The filament includes a first portion of the core composition surrounded by a second portion of the boundary composition. One or more filaments are extruded through a mechanically-controlled deposition nozzle onto a working surface to create a fibrous monolith composite object. The objects may be formed directly from computer models and have complex geometries.
    Type: Application
    Filed: June 29, 2004
    Publication date: December 2, 2004
    Applicant: Advanced Ceramics Research, Inc.
    Inventors: Anthony C. Mulligan, Mark J. Rigali, Manish P. Sutaria, Gregory J. Artz, Felix H. Gafner, K. Ranji Vaidyanathan
  • Patent number: 6780370
    Abstract: A process for producing a SiC ceramic microtube by oxidizing the surface of an organosilicon polymer to become infusible by exposure to an ionizing radiation, extracting the uncrosslinked central portion of the fiber with an organic solvent to make a hollow silicon polymer fiber, and firing it in an inert gas so that it acquires a ceramic nature.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: August 24, 2004
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Masaki Sugimoto, Akira Idesaki, Kiyohito Okamura
  • Patent number: 6743393
    Abstract: A method for producing ceramic matrix composites wherein the method has the steps of impregnating crystalline silicon carbide fibers coated with an interfacial coating with a ceramic matrix precursor; forming the impregnated fibers into the desired shape; curing the shape; and heating the cured shape to a temperature in the range of greater than 1450° C. to 1800° C. to convert the ceramic matrix precursor into a crystal containing ceramic. A densification step may be optionally carried out until the desired porosity/density of the ceramic matrix composite is achieved.
    Type: Grant
    Filed: June 17, 1998
    Date of Patent: June 1, 2004
    Assignee: Coi Ceramics, Inc.
    Inventor: Daniel Ralph Petrak
  • Publication number: 20040087431
    Abstract: The present invention relates to a method for producing silicon oxycarbide fibers by pyrolysis of preceramic precursors.
    Type: Application
    Filed: October 14, 2003
    Publication date: May 6, 2004
    Applicant: UNIVERSITA DEGLE STUDI DI TRENTO
    Inventors: Gian Domenico Soraru, Sandra Dire, Alberto Berlinghieri
  • Publication number: 20040048731
    Abstract: The present invention relates to microporous ceramic materials, and the production method thereof, which can be suitably used in various structural materials, high-temperature filters, electrode materials, preform materials for infiltration, etc., wherein said method comprises the steps of: producing molded bodies by homogeneously mixing a starting material of polymer ceramic precursor powder, and then forming the same; saturating the same by introducing fluid of a non-critical state to said molded bodies in a pressure vessel; super-saturating the fluid of a non-critical state saturated to molded bodies by adjusting pressure in said pressure vessel; forming micropores in said molded bodies by evolving said fluid of a non-critical state from said molded bodies by heating said molded bodies; hardening said molded bodies having micropores; and carrying out pyrolysis by heating said hardened molded bodies. Accordingly, the present invention allows easy control of pore characteristics (e.g.
    Type: Application
    Filed: June 17, 2003
    Publication date: March 11, 2004
    Inventors: Hai-Doo Kim, Young-Wook Kim, Chul Bum Park
  • Patent number: 6699810
    Abstract: A method of making a ceramic composite wherein a polymeric ceramic precursor or fiber reinforcement infiltrated with a polymeric ceramic precursor is associated with at least one metallic element to form a preceramic composite and the said composite is pyrolyzed by high frequency microwave radiation, preferably in the form of a beam, until the polymeric ceramic precursor is converted into a ceramic having the at least one metallic element integrally formed as part of said ceramic. The products obtained by such method comprising ceramic metal composites formed by pyrolyzing a preceramic composite to high frequency microwave radiation until the polymeric ceramic precursor is converted into a ceramic having at least one metallic element integrally formed as a part of said component.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: March 2, 2004
    Assignee: Thor Technologies, Inc.
    Inventors: Stuart T. Schwab, Thomas W. Hardek, Joel D. Katz
  • Publication number: 20030209838
    Abstract: A method of making a ceramic composite wherein a polymeric ceramic precursor or fiber reinforcement infiltrated with a polymeric ceramic precursor is associated with at least one metallic element to form a preceramic composite and the said composite is pyrolyzed by high frequency microwave radiation, preferably in the form of a beam, until the polymeric ceramic precursor is converted into a ceramic having the at least one metallic element integrally formed as part of said ceramic.
    Type: Application
    Filed: August 14, 2001
    Publication date: November 13, 2003
    Inventors: Stuart T. Schwab, Thomas W. Hardek, Joel D. Katz
  • Patent number: 6589457
    Abstract: An organic solvent-free process for deposition of metal oxide thin films is presented. The process includes aqueous solutions of necessary metal precursors and an aqueous solution of a water-soluble polymer. After a coating operation, the resultant coating is fired at high temperatures to yield optical quality metal oxide thin films.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: July 8, 2003
    Assignee: The Regents of the University of California
    Inventors: DeQuan Li, Quanxi Jia
  • Publication number: 20030114294
    Abstract: The invention relates to a process for the production of ceramic bearing components in which a mixture of a metallo-organic compound and a chemically reactive filling substance is subjected to a pyrolysis reaction and the resulting product.
    Type: Application
    Filed: November 8, 2002
    Publication date: June 19, 2003
    Inventor: Jurgen Gegner
  • Publication number: 20030098529
    Abstract: Nanoscale corundum powders are obtained by first producing an Al2O3 precursor by adding seed crystals to an aqueous solution of an aluminium compound and adding a base and then converting the Al2O3 precursor into corundum by calcination at a high temperature. Before the calcination, the salts that are present in addition to the Al2O3 precursor are separated off. The resulting product is calcined at temperatures of 700 to 975° C. and any fines that may be present are removed. The resulting corundum powders can be sintered at temperatures of ≦1200° C. to produce compacts or components of multiple layer systems.
    Type: Application
    Filed: December 23, 2002
    Publication date: May 29, 2003
    Inventors: Robert Drumm, Christian Goebbert, Kai Gossmann, Ralph Nonninger, Helmut Schmidt