Zirconium Containing (e.g., Zirconate, Etc.) Patents (Class 423/594.12)
  • Patent number: 10058846
    Abstract: An catalyst for purifying exhaust gas comprising an OCS material that has sufficient heat resistance and achieves a favorable balance between the oxygen storage volume and the oxygen absorption/release rate includes an catalyst for purifying exhaust, which has a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises a ceria-zirconia-based composite oxide having a pyrochlore structure in an amount of 5 to 100 g/L based on the volume of the substrate, the ceria-zirconia-based composite oxide has a secondary particle size (D50) of 3 ?m to 7 ?m, and the ceria-zirconia-based composite oxide optionally contains praseodymium.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: August 28, 2018
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Yoshinori Saito, Masahide Miura, Seiji Nakahigashi, Hiromasa Suzuki, Takahiro Suzuki, Kosuke Iizuka, Minoru Ito, Ryota Nakashima
  • Patent number: 10010868
    Abstract: A ceria-zirconia-based composite oxide which has a crystal phase of the composite oxide of a single solid-solution phase even after exposure to a high temperature over a long time and has a small change in mode pore diameter and in pore volume before and after a high temperature durability test is provided. This is realized by a ceria-zirconia-based composite oxide having a chemical composition, by mass ratio, of zirconia: 30% to 80%, a total of oxides of one or more elements selected from yttrium and rare earth elements having atomic number 57 to 71 (except cerium and promethium): 0% to 20%, and a balance of ceria and unavoidable impurities, in which ceria-zirconia-based composite oxide, the composite oxide is deemed to be a single solid-solution phase in an X-ray diffraction pattern after a durability test which heats the oxide in the atmosphere at a temperature condition of 1100° C.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: July 3, 2018
    Assignee: NIPPON DENKO CO., LTD.
    Inventors: Yasuharu Shingai, Tomoharu Itoh, Wataru Nagoh
  • Patent number: 9845731
    Abstract: Systems and methods are disclosed herein for passively managing cooling air in a gas turbine engine. A cooling air supply line may supply cooling air to a component in the gas turbine engine. A metering coupon may have a negative coefficient of thermal expansion. The metering coupon may allow more airflow through the metering coupon and through the component in response to an increase in temperature.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: December 19, 2017
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Michael J. Birnkrant, Carey Clum
  • Patent number: 9005568
    Abstract: The invention provides a process for production of powder of perovskite compound which comprises: the first step for obtaining an aggregate of perovskite compound which comprises at least one A group element selected from the group consisting of Mg, Ca, Sr, Ba and Pb and at least one B group element selected from the group consisting of Ti, Zr, Hf and Sn, and which is represented by the general formula ABO3 wherein A is at least one A group element and B is at least one B group element; and the second step for heating the aggregate of perovskite compound obtained in the first step in a solvent at a temperature in a range from 30° C. to 500° C. whereby disintegrating the aggregate.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: April 14, 2015
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Takashi Shikida, Shinji Ogama, Yoshiaki Ikeda, Kazuhisa Hidaka
  • Patent number: 8986895
    Abstract: An all-solid-state lithium ion secondary battery containing a novel garnet-type oxide serving as a solid electrolyte. The garnet-type lithium ion-conducting oxide is one represented by the formula Li5+XLa3(ZrX, A2-X)O12, wherein A is at least one selected from the group consisting of Sc, Ti, V, Y, Nb, Hf, Ta, Al, Si, Ga, Ge, and Sn and X satisfies the inequality 1.4?X<2, or is one obtained by substituting an element having an ionic radius different from that of Zr for Zr sites in an garnet-type lithium ion-conducting oxide represented by the formula Li7La3Zr2O12, wherein the normalized intensity of an X-ray diffraction (XRD) pattern with a diffraction peak, as normalized on the basis of the intensity of a diffraction peak, is 9.2 or more.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: March 24, 2015
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Shingo Ohta, Tetsuro Kobayashi, Takahiko Asaoka, Mitsuru Asai
  • Patent number: 8900537
    Abstract: A template-free reverse micelle (RM) based method is used to synthesize pyrochlore nanostructures having photocatalytic activity. In one embodiment, the method includes separately mixing together a first acid stabilized aqueous solution including pyrochlore precursor A and a second acid stabilized aqueous solution including pyrochlore precursor B with an organic solution including a surfactant to form an oil-in-water emulsion. Next, equimolar solutions of the first and second acid stabilized oil-in-water emulsions are mixed together. Then, the mixture of the first and second acid stabilized oil-in-water emulsion is treated with a base to produce a precipitate including pyrochlore precursors A and B. After which, the precipitate is dried to remove volatiles. The precipitate is then calcined in the presence of oxygen to form a pyrochlore nanostructure, such as a bismuth titanate (Bi2Ti2O7) pyrochlore nanorod. The method of synthesizing the pyrochlore nanorod is template-free.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: December 2, 2014
    Assignee: Board of Regents of the Nevada System of Higher Education, on behalf of the University of Nevada, Reno
    Inventors: Vaidyanathan Subramanian, Sankaran Murugesan
  • Publication number: 20140295649
    Abstract: Preparation of semiconductor nanocrystals and their dispersions in solvents and other media is described. The nanocrystals described herein have small (1-10 nm) particle size with minimal aggregation and can be synthesized with high yield. The capping agents on the as-synthesized nanocrystals as well as nanocrystals which have undergone cap exchange reactions result in the formation of stable suspensions in polar and nonpolar solvents which may then result in the formation of high quality nanocomposite films.
    Type: Application
    Filed: June 20, 2014
    Publication date: October 2, 2014
    Applicant: PIXELLIGENT TECHNOLOGIES, LLC
    Inventors: Zehra Serpil GONEN WILLIAMS, Yijun Wang, Robert J. Wiacek, Xia Bai, Linfeng Gou, Selina I. Thomas, Wei Xu, Jun Xu, Rakesh Patel
  • Patent number: 8802050
    Abstract: There are provided a method of manufacturing a ceramic powder having a perovskite structure and a ceramic powder having a perovskite structure manufactured by the same. The method includes: mixing a compound of an element corresponding to site A in an ABO3 perovskite structure as well as a compound of an element corresponding to site B in the same structure, with supercritical water in a continuous mode to form seed crystals; and mixing the seed crystals in a batch mode to conduct grain growth thereof.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: August 12, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Chang Hak Choi, Kum Jin Park, Kang Heon Hur, Hye Young Baeg, Jung Hwan Kim, Hyung Joon Jeon, Sang Hoon Kwon
  • Patent number: 8728435
    Abstract: Catalyst/catalyst support composition essentially consist of oxides of zirconium, cerium and lanthanum and of another rare earth selected from among yttrium, gadolinium and samarium, having a proportion of the lanthanum oxide and the oxide of the other rare earth of at least 15% and specific surfaces of at least 40 m2/g and at least 15 m2/g after calcination respectively for 4 hours at 1,000° C. and 10 hours at 1,150° C.; after calcination for 10 hours at 1,200° C. these have a surface of at least 7 m2/g and such surface is at least 5 m2/g for an embodiment in which after 10 hours of calcination at 1,150° C. the composition is in the form of a pure solid solution.
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: May 20, 2014
    Assignee: Rhodia Operations
    Inventors: Olivier Larcher, Emmanuel Rohart, Stephan Verdier
  • Patent number: 8721913
    Abstract: A lead-based particulate piezoelectric material has a median diameter of less than 1 ?m and a particle size distribution expressed by [arithmetic deviation/mean] of no greater than 15% and in which no less than 85% of all particles are cubic.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: May 13, 2014
    Assignee: NGK Insulators, Ltd.
    Inventor: Takaaki Koizumi
  • Patent number: 8658317
    Abstract: The invention is directed to a solid ion conductor which has a garnet-like crystal structure and has the stoichiometric composition L7+xAxG3?xZr2O12, wherein L is in each case independently a monovalent cation, A is in each case independently a divalent cation, G is in each case independently a trivalent cation, 0?x?3 and O can be partly or completely replaced by divalent or trivalent anion.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: February 25, 2014
    Assignee: BASF SE
    Inventors: Werner Weppner, Ramaswamy Murugan
  • Patent number: 8647597
    Abstract: An object of the present invention is to provide a process to grind at least one mineral material in the presence of ceria (CeO2)-containing zirconium oxide grinding beads having a specific ceria content (of between 14 and 20% by weight relative to the total weight of said bead, preferably of between 15 and 18%, and most preferably of approximately 16%), and a specific average grain size (of less than 1 ?m, preferably of less than 0.5 ?m, and most preferably of less than 0.3 ?m), wherein such beads are more resistant to wear than conventional beads of the prior art. Another object of the present invention lies in the ground material in the form of an aqueous suspension and in the form of a dry product. Another object of the present invention lies in the uses of such products in any sector making use of mineral materials, and notably in the paper, paint and plastic industries.
    Type: Grant
    Filed: October 23, 2013
    Date of Patent: February 11, 2014
    Assignee: Omya International AG
    Inventors: Christian Rainer, Michael Pohl
  • Patent number: 8591853
    Abstract: An object of the present invention is to provide a process to grind at least one mineral material in the presence of ceria (CeO2)-containing zirconium oxide grinding beads having a specific ceria content (of between 14 and 20% by weight relative to the total weight of said bead, preferably of between 15 and 18%, and most preferably of approximately 16%), and a specific average grain size (of less than 1 ?m, preferably of less than 0.5 ?m, and most preferably of less than 0.3 ?m), wherein such beads are more resistant to wear than conventional beads of the prior art. An other object of the present invention lies in the ground material in the form of an aqueous suspension and in the form of a dry product. An other object of the present invention lies in the uses of such products in any sector making use of mineral materials, and notably in the paper, paint and plastic industries.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: November 26, 2013
    Assignee: Omya International AG
    Inventors: Christian Rainer, Michael Pohl
  • Patent number: 8574524
    Abstract: The present invention provides a porous composite oxide comprising an aggregate of secondary particles in the form of aggregates of primary particles of a composite oxide containing two or more types of metal elements, and having mesopores having a pore diameter of 2-100 nm between the secondary particles; wherein, the percentage of the mesopores between the secondary particles having a diameter of 10 nm or more is 10% or more of the total mesopore volume after firing for 5 hours at 600° C. in an oxygen atmosphere.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: November 5, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinichi Takeshima, Kohei Yoshida, Akio Koyama
  • Patent number: 8524124
    Abstract: The invention provides a process for producing an aqueous dispersion of zirconium oxide comprising: reacting a zirconium salt with an alkali in water to obtain a slurry of particles of zirconium oxide; filtering, washing, and repulping the slurry; adding an organic acid to the resulting slurry in an amount of one mole part or more per mole part of the zirconium in the slurry; hydrothermally treating the resulting mixture at a temperature of 170° C. or higher; and washing the resulting aqueous dispersion of particles of zirconium oxide.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: September 3, 2013
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Kenichi Nakagawa, Takanori Morita
  • Patent number: 8455392
    Abstract: A new type of solid acid catalyst, which promises better catalytic performance than conventionally prepared supported metal oxides due to its precisely synthesized nanostructure has been described. The catalyst is nanoparticulate in form and is comprised of monolayers of tungstated zirconia of the formula, WOxZryO4-2y made by impregnating a support with zirconium and tungsten. The support catalyst is further characterized in having a tugsten monolayer between greater than 0001 W/nm2 to about 30 W/nm2.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: June 4, 2013
    Assignees: William Marsh Rice University, Lehigh University
    Inventors: Israel E. Wachs, Elizabeth I. Ross-Medgaarden, Michael Sha-nang Wong
  • Patent number: 8449845
    Abstract: In light of the recent analytical technology demanded of fast and accurate measurement of high purity materials, a zirconium crucible is provided for melting an analytical sample and is capable of inhibiting the inclusion of impurities from the crucible by using a high-purity crucible, improving the durability of high-purity zirconium as an expensive crucible material, and increasing the number of times that the zirconium crucible can be used. With this zirconium crucible used for melting an analytical sample in the pretreatment of the analytical sample, the purity excluding gas components is 3N or higher, and the content of carbon as a gas component is 100 mass ppm or less.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: May 28, 2013
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Yuichiro Shindo, Masahiro Sakaguchi, Mitsuru Yamaguchi
  • Patent number: 8382877
    Abstract: The present invention provides an approach to control the generation and grow of nanocrystal with membrane diffusion method and related apparatuses to produce inorganic oxide nanopowders and metal nanoparticles. With this method, the size and size distribution of inorganic oxide nanopowders and metal nanoparticles can be tuned. It overcomes the shortcomings possessed by the common chemical and physical method of preparing nanoparticles.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: February 26, 2013
    Assignee: Beijing University of Technology
    Inventors: Hong He, Hongxing Dai, Xuehong Zi
  • Patent number: 8268141
    Abstract: A high-strength sputtering target for forming a protective film for an optical recording medium, obtained by sintering a mixed powder containing, in mol %, 10 to 70% of a zirconium oxide or hafnium oxide and 50% or less (over 0%) of silicon dioxide, and 0.1 to 8.4% of yttrium oxide as necessary, and the remainder containing aluminum oxide, lanthanum oxide, or indium oxide and inevitable impurities, wherein a complex oxide phase of Al6Si2O13, La2SiO5, or In2Si2O7 is formed in a base of the target.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: September 18, 2012
    Assignee: Mitsubishi Materials Corporation
    Inventors: Shoubin Zhang, Hayato Sasaki, Shozo Komiyama, Akifumi Mishima
  • Publication number: 20120231948
    Abstract: There are provided a catalyst for reverse shift reaction which has excellent durability at a high temperature, can suppress generation of a methanation reaction, and can efficiently generate a reverse shift reaction to produce a synthesis gas including carbon monoxide and unreacted hydrogen with a reduced methane content, and a method for producing a synthesis gas using the catalyst for reverse shift reaction. The composition of the catalyst for the reverse shift reaction includes a composite oxide containing at least one alkali earth metal selected from the group consisting of Ca, Sr and Ba and at least one transition metal selected from the group consisting of Ti and Zr. A raw material gas containing carbon dioxide and hydrogen is contacted with the catalyst for reverse shift reaction at a temperature of 700° C. or higher.
    Type: Application
    Filed: May 16, 2012
    Publication date: September 13, 2012
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventor: Yoshinori Saito
  • Publication number: 20120225292
    Abstract: There are provided a method of manufacturing a ceramic powder having a perovskite structure and a ceramic powder having a perovskite structure manufactured by the same. The method includes: mixing a compound of an element corresponding to site A in an ABO3 perovskite structure as well as a compound of an element corresponding to site B in the same structure, with supercritical water in a continuous mode to form seed crystals; and mixing the seed crystals in a batch mode to conduct grain growth thereof.
    Type: Application
    Filed: March 2, 2012
    Publication date: September 6, 2012
    Inventors: Chang Hak Choi, Kum Jin Park, Kang Heon Hur, Hye Young Baeg, Jung Hwan Kim, Hyung Joon Jeon, Sang Hoon Kwon
  • Patent number: 8242047
    Abstract: The present invention relates to an oxide catalyst and a phosphoric oxide catalyst for hydrocarbon steam cracking, method for preparing the same and a method for preparing olefin by using the same. More precisely, the present invention relates to an oxide catalyst for hydrocarbon steam cracking represented by formula 1 and a phosphoric oxide catalyst for hydrocarbon steam cracking represented by formula 3 which would be used for the production of olefin such as ethylene and propylene by hydrocarbon steam cracking, and a method for preparing the same. The present invention provides an oxide catalyst and a phosphoric oxide catalyst for hydrocarbon steam cracking that has excellent thermo-stability at high temperature and improved olefin yield. CrZrjAkOx??[Formula 1] CrZrjAkPlOx??[Formula 3] Wherein, j, k, l and x are as indicated in the description.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: August 14, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Jun-seon Choi, Jun-Han Kang, Jong-hun Song, Byoung-gi Park, Chang-hoon Kang, Si-hyun Noh
  • Patent number: 8192710
    Abstract: The inventive composition is based on cerium oxide and on zirconium oxide in an atomic proportion Ce/Zr of at least 1, and has a reducibility rate of at least 70% and a surface area of at least 15 m; 2; /g. This composition is obtained by a method in which: a mixture is made containing cerium and zirconium compounds; this mixture is provided with a basic compound whereby obtaining a precipitate that is heated in an aqueous medium; a surfactant-type additive or a polyethylene glycol or a carboxylic acid is added to this medium or to the separated precipitate; the mixture is ground; the precipitate obtained thereof is calcined under inert gas or vacuum, in a first period of time, at a temperature of at least 850 .iC and then under an oxidizing atmosphere, in a second period of time, at a temperature of at least 400° C.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: June 5, 2012
    Assignee: Rhodia Operations
    Inventors: Olivier Larcher, Emmanuel Rohart
  • Patent number: 8187995
    Abstract: This invention relates to a cerium-zirconium-base composite oxide, which is useful, e.g., for the purification of exhaust gas discharged from combustion engines such as internal combustion engines and boilers and can release a high level of oxygen in a low temperature region, a method for producing the same, an oxygen storage/release component using the same, an exhaust gas purification catalyst, and an exhaust gas purification method. The cerium-zirconium-base composite oxide satisfies requirements (1) that the oxygen release initiation temperature is 380° C. or below, (2) that the oxygen release amount is not less than 485 ?mol/g, and further (3) that the oxygen release amount at 400° C. is not less than 15 ?mol/g.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: May 29, 2012
    Assignees: Daiichi Kigenso Kagaku Kogyo Co., Ltd., N.E. Chemcat Corporation
    Inventors: Takahiro Wakita, Akira Kohara, Yasuharu Kanno, Hiroaki Omoto
  • Publication number: 20120115709
    Abstract: Ceramic catalyst carriers that are mechanically, thermally and chemically stable in a ionic salt monopropellant decomposition environment, high temperature catalysts for decomposition of liquid high-energy-density monopropellants and ceramic processing techniques for producing spherical catalyst carrier granules are disclosed. The ceramic processing technique is used to produce spherical catalyst carrier granules with controlled porosities and desired composition and allows for reproducible packing densities of catalyst granules in thruster chambers. The ceramic catalyst carrier has excellent thermal shock resistance, good compatibility with the active metal coating and metal coating deposition processes, melting point above >2300° C., chemical resistance to steam, nitrogen oxides and nitric acid, resistance to sintering to prevent void formation, and the absence of phase transition associated with volumetric changes at temperatures up to and beyond 1800° C.
    Type: Application
    Filed: November 9, 2010
    Publication date: May 10, 2012
    Applicant: Sienna Technologies, Inc.
    Inventors: Ender Savrun, Stephanie J. Sawhill
  • Patent number: 8137646
    Abstract: A mixture of zirconium hydroxides or zirconium basic carbonate with vanadium oxide (V205) co-reacts in high temperature aqueous slurry to form respectively an amorphous material, believed to be based on a zirconium analog of a zeolite structure, and a solid solution of zirconium oxide with vanadium oxide. The subject compositions, free of hexavalent chromium, are highly effective in providing blister-free corrosion prevention in typical coil and aerospace grade epoxy primer and color coat combinations.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: March 20, 2012
    Assignee: The Shepherd Color Company
    Inventor: Simon Boocock
  • Publication number: 20110311805
    Abstract: The invention relates to a cutting tool having a substrate base body and a single or multi-layered coating attached thereupon, wherein at least one layer of the coating is a metal oxide layer produced in the PVD process or in the CVD process and the metal oxide layer has a grain structure wherein there is structural disorder within a plurality of the existing grains that are characterized in that in electron diffraction images of the grains, point-shaped reflections occur up to a maximum lattice spacing dGRENZ and for lattice spacing greater than dGRENZ no point-shaped reflections occur, but rather a diffuse intensity distribution typical for amorphous structures.
    Type: Application
    Filed: March 18, 2010
    Publication date: December 22, 2011
    Applicant: WALTER AG
    Inventors: Veit Schier, Oliver Eibl, Wolfgang Engelhart
  • Patent number: 8080230
    Abstract: The invention relates to fine-particulate zirconium titanates or lead zirconium titanates and a method for production thereof by reaction of titanium dioxide particles with a zirconium compound or a lead and zirconium compound. The titanium dioxide particles have a BET surface of more than 50 m2/g. The lead zirconium titanates can be used for the production of microelectronic components.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: December 20, 2011
    Assignee: Tronox Pigments GmbH
    Inventors: Gerhard Auer, Horst Günnel, Frank Hipler, Michael J. Hoffman, Susanne Wagner, Hans Kungl
  • Patent number: 8048398
    Abstract: Process for preparing a mixed metal oxide powder, in which oxidizable starting materials are evaporated and oxidized, the reaction mixture is cooled after the reaction and the pulverulent solids are removed from gaseous substances, wherein as starting materials, at least one pulverulent metal and at least one metal compound, the metal and the metal component of the metal compound being different and the proportion of metal being at least 80% by weight based on the sum of metal and metal component from metal compound, together with one or more combustion gases, are fed to an evaporation zone of a reactor, where metal and metal compound are evaporated completely under nonoxidizing conditions, subsequently, the mixture flowing out of the evaporation zone is reacted in the oxidation zone of this reactor with a stream of a supplied oxygen-containing gas whose oxygen content is at least sufficient to oxidize the starting materials and combustion gases completely.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: November 1, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Stipan Katusic, Guido Zimmermann, Michael Kraemer, Peter Kress, Horst Miess
  • Patent number: 8048389
    Abstract: The present invention provides a cerium oxide-zirconium oxide-based mixed oxide having superior platinum dispersibility and a suitable OSC, and a simple production process thereof. The cerium oxide-zirconium oxide-based mixed oxide comprises cerium oxide and zirconium oxide, wherein (1) the weight ratio of CeO2:ZrO2 is 60:40 to 90:10, and (2) the cerium oxide and the zirconium oxide are present as a mixture, the zirconium oxide being composed of a solid solution in which tetragonal or cubic zirconium oxide contains cerium.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: November 1, 2011
    Assignee: Daiichi Kigenso Kagaku Kogyo Co., Ltd.
    Inventors: Hiroshi Okamoto, Masatoshi Maruki
  • Patent number: 8043992
    Abstract: A particulate inorganic mixed oxide comprising: aluminum; zirconium; cerium; lanthanum and an additional element selected from the group consisting of neodymium and praseodymium, wherein the inorganic mixed oxide has at least 80% of primary particles with article diameters of 100 nm or less, and at least a part of the primary particles have an enriched surface region where the additional element is locally increased in a surface layer portion thereof.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: October 25, 2011
    Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha, Cataler Corporation
    Inventors: Miho Hatanaka, Toshitaka Tanabe, Naoki Takahashi, Takeru Yoshida, Yuki Aoki
  • Patent number: 8043716
    Abstract: Disclosed herein is a gradient thin film, formed on a substrate by simultaneously depositing different materials on the substrate using a plurality of thin film deposition apparatuses provided in a vacuum chamber, wherein the gradient thin film is formed such that the composition thereof is continuously changed depending on the thickness thereof by deposition control plates provided in the path through which the different materials move to the substrate. The gradient thin film is advantageous in that the thin film is formed by simultaneously depositing different materials using various deposition apparatuses, so that the composition thereof is continuously changed depending on the thickness thereof, with the result that the physical properties of a thin film are easily controlled and the number of deposition processes is decreased, and thus processing time and manufacturing costs are decreased, thereby improving economic efficiency.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: October 25, 2011
    Assignee: Korea Electrotechnology Research Institute
    Inventors: Ho Sup Kim, Sang Soo Oh, Tae Hyung Kim, Dong Woo Ha, Kyu Jung Song, Hong Soo Ha, Rock Kil Ko, Nam Jin Lee
  • Patent number: 8012449
    Abstract: A method of manufacturing a complex metal oxide powder, the method including: preparing a raw material composition for forming a complex metal oxide; mixing an oxidizing solution including an oxidizing substance into the raw material composition to produce complex metal oxide particles to obtain a liquid dispersion of the particles; and separating the particles from the liquid dispersion to obtain a complex metal oxide powder. The complex metal oxide is shown by a general formula AB1?xCxO3, an element A including at least Pb, an element B including at least one of Zr, Ti, V, W, and Hf, and an element C including at least one of Nb and Ta.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: September 6, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Takeshi Kijima, Hidemichi Furihata, Setsuya Iwashita, Satoshi Kimura, Toshihiko Kaneda
  • Patent number: 7968070
    Abstract: Process for the production of a metal oxide powder having a BET surface area of at least 20 m2/g by reacting an aerosol with oxygen in a reaction space at a reaction temperature of more than 700° C. and then separating the resulting powder from gaseous substances in the reaction space, wherein the aerosol is obtained by atomisation using a multi-component nozzle of at least one starting material, as such in liquid form or in solution, and at least one atomising gas, the volume-related mean drop diameter D30 of the aerosol is from 30 to 100 ?m and the number of aerosol drops larger than 100 ?m is up to 10%, based on the total number of drops, and metal oxide powder obtainable by this process.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: June 28, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Stipan Katusic, Michael Kraemer, Michael Kroell, Peter Kress, Edwin Staab
  • Patent number: 7968490
    Abstract: A porous substance producing method for producing a porous substance; by holding particles for precursors of the porous substance in micelles or inverse micelles kept in a dispersed state in a solvent with a surfactant; by agglomerating the particles of the micelles or inverse micelles to each other; and by baking the agglomerated particles. The method comprises the step of agglomerating the particles of the micelles or inverse micelles to each other by performing a treatment to resolve the dispersed state of the micelles or inverse micelles containing the particles for the precursors, with the surfactant.
    Type: Grant
    Filed: July 11, 2005
    Date of Patent: June 28, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinichi Takeshima, Akio Koyama
  • Patent number: 7964527
    Abstract: Catalytic compositions useful, e.g., for the treatment of internal combustion engine exhaust gases, are based on zirconium oxide in a weight proportion of at least 25%, from 15% to 60% of cerium oxide, from 10% to 25% of yttrium oxide, from 2% to 10% of lanthanum oxide and from 2% to 15% of another rare earth oxide, have a specific surface of at least 15 m2/g and a cubic phase, and are prepared from a mixture of zirconium, cerium, yttrium, lanthanum and the additional rare earth, by precipitating such mixture with a base, heating the precipitate in an aqueous medium, adding thereto a surfactant and calcining the precipitate.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: June 21, 2011
    Assignee: Rhodia Operations
    Inventors: Olivier Larcher, Stephan Verdier, Emmanuel Rohart, Aimin Huang
  • Patent number: 7939040
    Abstract: The inventive composition is based on cerium oxide and on zirconium oxide in an atomic proportion Ce/Zr of at least 1, and has a reducibility rate of at least 70% and a surface area of at least 15 m; 2; /g. This composition is obtained by a method in which: a mixture is made containing cerium and zirconium compounds; this mixture is provided with a basic compound whereby obtaining a precipitate that is heated in an aqueous medium; a surfactant-type additive or a polyethylene glycol or a carboxylic acid is added to this medium or to the separated precipitate; the mixture is ground; the precipitate obtained thereof is calcined under inert gas or vacuum, in a first period of time, at a temperature of at least 850° C. and then under an oxidizing atmosphere, in a second period of time, at a temperature of at least 400° C.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: May 10, 2011
    Assignee: Rhodia Operations
    Inventors: Olivier Larcher, Emmanuel Rohart
  • Patent number: 7939041
    Abstract: An improved method for the formation of composite hydroxides or oxides comprising, on an oxide basis, Al2O3 and ZrO2, and optionally CeO2, La2O3, Nd2O3, Pr6O11, Sm2O3, Y2O3, and other rare earth oxides, comprising the steps of preparing an aqueous metal salt solution and forming a hydroxide precipitate slurry by combining the aqueous metal salt solution with an aqueous solution of a caustic alkali at a pH greater than 8.5 to precipitate out all the metal species. The variation in pH during the precipitation reaction is ±1. The invention also relates to composites formed by this method comprising 20-70 wt % Al2O3, 10-77 wt % ZrO2, 0-34 wt % CeO2 and 0-22 wt % REOs other than CeO2, and to composites per se comprising, on an oxide basis, 42-70 wt % Al2O3, 10-48 wt % ZrO2, 2-34 wt % CeO2 and 0-9 wt % REOs other than CeO2 and having the following properties after heating to 850° C. over four hours and holding at 850° C.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: May 10, 2011
    Assignee: Magnesium Elektron Limited
    Inventor: John G. Darab
  • Patent number: 7918932
    Abstract: A process for producing an inorganic doped-zircon pigment includes calcining a base mixture comprising raw plasma-dissociated zircon, a chromophore, and at least one mineralizer, to produce a raw pigment. The raw pigment is refined to obtain an inorganic doped-zircon pigment.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: April 5, 2011
    Assignee: The South African Nuclear Energy Corporation Limited
    Inventor: Ettienne Snyders
  • Patent number: 7897135
    Abstract: The present invention is generally directed to a novel, economic synthesis of oxide ceramic composites. Methods of the present invention, referred to as carbon combustion synthesis of oxides (CCSO), are a modification of self-propagating high-temperature synthesis (SHS) methods in which the heat needed for the synthesis is generated by combustion of carbon in oxygen rather than that of a pure metal. This enables a more economic production of the ceramic material and minimizes the presence of intermediate metal oxides in the product. The reactant mixture generally comprises at least one oxide precursor (e.g., a metal or non metal oxide, or super oxide, or nitride, or carbonate, or chloride, or oxalate, or halides) as a reactant, but no pure metal. Pure carbon in the form of graphite or soot is added to the reactant mixture to generate the desired heat (upon ignition). The mixture is placed in a reactor and exposed to gaseous oxygen.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: March 1, 2011
    Assignee: University of Houston
    Inventors: Karen S. Martirosyan, Dan Luss
  • Publication number: 20110044876
    Abstract: A method for the decomposition of one or more metal oxide precursor compounds, at least one of which is a metal carboxylate salt, to a metal oxide or mixed metal oxide by contacting the metal oxide precursor compound or compounds with an aqueous reaction mixture at a pH, pressure and temperature effective to decompose all metal oxide precursor compounds, wherein the temperature is between about room temperature and about 350° C. and the contact duration is effective to decompose all metal oxide precursor compounds to form an essentially pure metal oxide or mixed metal oxide.
    Type: Application
    Filed: November 26, 2008
    Publication date: February 24, 2011
    Applicant: Rutgers University
    Inventors: Richard E. Riman, Vahit Atakan
  • Patent number: 7879759
    Abstract: DeNOx catalysts for the reduction of NOx compounds and porous catalyst support materials are provided. The inventive catalysts comprise an active metal catalyst component and mixed TiO2/ZrO2 porous support particles that comprise a) a crystalline phase comprising titanium dioxide and/or a titanium/zirconium mixed oxide, b) an amorphous phase comprising zirconium, and c) a small amount of one or more metal oxide(s) or metalloid oxide(s) deposited on the amorphous outer layer. The inventive catalysts exhibit superior activity and ammonia selectivity.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: February 1, 2011
    Inventors: Steve M. Augustine, Guoyi Fu, Mark Watson
  • Patent number: 7871956
    Abstract: This invention relates to a cerium-zirconium-base composite oxide, which is useful, e.g., for the purification of exhaust gas discharged from combustion engines such as internal combustion engines and boilers and can release a high level of oxygen in a low temperature region, a method for producing the same, an oxygen storage/release component using the same, an exhaust gas purification catalyst, and an exhaust gas purification method. The cerium-zirconium-base composite oxide satisfies requirements (1) that the oxygen release initiation temperature is 380° C. or below, (2) that the oxygen release amount is not less than 485 ?mol/g, and further (3) that the oxygen release amount at 400° C. is not less than 15 ?mol/g.
    Type: Grant
    Filed: March 13, 2007
    Date of Patent: January 18, 2011
    Assignees: Daiichi Kigenso Kagaku Kogyo Co., Ltd., N.E. Chemcat Corporation
    Inventors: Takahiro Wakita, Akira Kohara, Yasuharu Kanno, Hiroaki Omoto
  • Patent number: 7867471
    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: Grant
    Filed: April 3, 2009
    Date of Patent: January 11, 2011
    Assignee: SACHEM, Inc.
    Inventor: Wilfred Wayne Wilson
  • Publication number: 20110002831
    Abstract: A sol-gel process for preparing a mixture of metal-oxide-metal compounds wherein at least one metal oxide precursor is subjected to a hydrolysis treatment to obtain one or more corresponding metal oxide hydroxides, the metal oxide hydroxides so obtained are subjected to a condensation treatment to form the metal-oxide-metal compounds, which process is carried out in the presence of an encapsulated catalyst, whereby the catalytically active species is released from the encapsulating unit by exposure to an external stimulus, and wherein the catalytically active species released after exposure to such external stimulus is capable of catalyzing the condensation of the metal-hydroxide groups that are present in the metal oxide hydroxides so obtained.
    Type: Application
    Filed: December 15, 2008
    Publication date: January 6, 2011
    Inventors: Nanning Joerg Arfsten, Pascal Jozef Paul Buskens, Jens Christoph Thies
  • Patent number: 7829061
    Abstract: The zirconium oxide hydrate particles of the present invention are represented by the formula ZrO2.nH2O and have a mean primary particle size of 0.5 nm or more and 5 nm or less, and “n” in the formula represents a number greater than 2.5. Moreover, the method for producing of zirconium oxide hydrate particles of the present invention includes the step of preparing zirconium oxide hydrate particles by adding an aqueous zirconium salt solution to an aqueous alkaline solution while controlling the pH to 7.0 or more and 13.0 or less, and the step of subjecting the zirconium oxide hydrate particles to a hydrothermal treatment in the presence of water at a temperature of 50° C. or more and less than 110° C. for 3 hours or more.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: November 9, 2010
    Assignees: Hitachi Maxwell, Ltd., Hitachi, Ltd.
    Inventors: Yuko Sawaki, Kazutaka Matsuo, Mikio Kishimoto, Takayuki Hirashige, Makoto Morishima
  • Patent number: 7820586
    Abstract: The invention concerns a composition based on zirconium and cerium oxides in an atomic ratio Zr/Ce>1, and further comprising lanthanum oxide or an oxide of a rare earth other than cerium and lanthanum. The invention is characterized in that after calcination for 6 hours at 1150 .C it has a specific surface area of not less than 10 m;/g. The composition is obtained by forming a mixture containing a sol of a zirconium compound and cerium, lanthanum, said rare earth compounds, contacting said mixture with a basic compound solution, while heating and calcining the resulting precipitate. The composition can be used as catalyst.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: October 26, 2010
    Assignee: Rhodia Operations
    Inventor: Catherine Hedouin
  • Patent number: 7820136
    Abstract: To provide a process for production of compound oxides having homogeneously diffused and mixed elements, there is provided a process for production of compound oxides, comprising contacting an organic phase having dissolved therein an organic compound which produces the hydroxide of a first element when hydrolyzed, with an aqueous phase containing a second element as an ion, to produce the hydroxide of the first element by hydrolysis reaction of the organic compound at the interface while incorporating the second element in the product, and firing the resulting product to produce a compound oxide of the first element and second element. Third or additional elements may be included in the aqueous phase to produce compound oxides comprising third or additional elements.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: October 26, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Shinichi Takeshima
  • Patent number: 7806694
    Abstract: Dental articles are produced using relatively low sintering temperatures to achieve high density dental articles exhibiting strengths equal to and greater than about 700 MPa. Ceramic powders comprised of nanoparticulate crystallites are used to manufacture dental articles. The ceramic powders may include sintering agents, binders and other similar additives to aid in the processing of the ceramic powder into a dental article. The ceramic powders may be processed into dental articles using various methods including, but not limited to, injection molding, gel-casting, slip casting, or electroforming, hand, cad/camming and other various rapid prototyping methods. The ceramic powder may be formed into a suspension, pellet, feedstock material or a pre-sintered blank prior to forming into the dental article.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: October 5, 2010
    Assignee: Pentron Ceramics, Inc.
    Inventors: Dmitri Brodkin, Moisey Y. Gamarnik
  • Patent number: 7794687
    Abstract: This invention relates to an improved amorphous zirconium hydroxide and a method for its production. The hydroxide has a surface area of at least 300 m2/g, a total pore volume of at least 0.70 cm3/g and an average pore size of between 5 nm and 15 nm, and is prepared by a process which comprises the steps of: a) preparing an aqueous solution comprising sulphate anions and a zirconium salt such that the ZrO2:SO3 ratio is 1:0.40 to 1:0.52, (b) chilling the solution to below 25° C., (c) adding an alkali in order to precipitate the amorphous zirconium hydroxide, (d) filtering and washing the precipitated zirconium hydroxide with water or an alkali to remove residual sulphate and chloride, (e) hydrothermally treating the zirconium hydroxide at a pressure of less than 3 barg, and (f) drying the zirconium hydroxide. The zirconium hydroxide of the present invention, which can be doped, is particularly useful in catalytic applications.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: September 14, 2010
    Assignee: Magnesium Elektron Limited
    Inventors: Heather Bradshaw, Clive Butler, Hazel Stephenson