Vanadium, Niobium, Or Tantalum Containing (e.g., Vanadate, Niobate, Tantalate, Etc.) Patents (Class 423/594.8)
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Patent number: 7211238Abstract: Mesoporous aluminum oxides with high surface areas have been synthesized using inexpensive, small organic templating agents instead of surfactants. Optionally, some of the aluminum can be framework-substituted by one or more other elements. The material has high thermal stability and possesses a three-dimensionally randomly connected mesopore network with continuously tunable pore sizes. This material can be used as catalysts for dehydration, hydrotreating, hydrogenation, catalytic reforming, steam reforming, amination, Fischer-Tropsch synthesis and Diels-Alder synthesis, etc.Type: GrantFiled: March 8, 2004Date of Patent: May 1, 2007Assignee: ABB Lummus Global Inc.Inventors: Zhiping Shan, Jacobus Cornelius Jansen, Chuen Y. Yeh, Philip J. Angevine, Thomas Maschmeyer
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Patent number: 7208135Abstract: Process for preparing mixed oxides by reacting alkoxides of the elements titanium, zirconium, niobium, tantalum or mixtures thereof with metal hydroxides, metal carboxylates, metal hydroxycarbonates, metal carbonates or mixtures thereof of the elements lithium, sodium, potassium, magnesium, calcium, strontium, barium, zinc, cadmium, aluminum, gallium, yttrium, lanthanum, praseodymium, neodymium, samarium, dysprosium, europium, lead, bismuth or mixtures thereof in a C1–C8-alkanol, in a glycol ether or in a mixture thereof at from 50 to 200° C.Type: GrantFiled: May 18, 2004Date of Patent: April 24, 2007Assignee: BASF AktiengesellschaftInventor: Hans-Josef Sterzel
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Patent number: 7153487Abstract: Methods and apparatus for preconditioning a lithium niobate or lithium tantalate crystal. At least a portion of a surface of the crystal is covered with a condensed material including one or more active chemicals. The crystal is heated in a non-oxidizing environment above an activating temperature at which the active chemicals contribute to reducing the crystal beneath the covered surface portion. The crystal is cooled from above the activating temperature to below a quenching temperature at which the active chemicals become essentially inactive for reducing the crystal.Type: GrantFiled: May 25, 2004Date of Patent: December 26, 2006Assignee: Crystal Technology, Inc.Inventors: Dieter Hans Jundt, Maria Claudia Custodio Kajiyama, Jason Louis Spitzer
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Patent number: 7147834Abstract: A low-temperature hydrothermal reaction is provided to generate crystalline perovskite nanotubes such as barium titanate (BaTiO3) and strontium titanate (SrTiO3) that have an outer diameter from about 1 nm to about 500 nm and a length from about 10 nm to about 10 micron. The low-temperature hydrothermal reaction includes the use of a metal oxide nanotube structural template, i.e., precursor. These titanate nanotubes have been characterized by means of X-ray diffraction and transmission electron microscopy, coupled with energy dispersive X-ray analysis and selected area electron diffraction (SAED).Type: GrantFiled: August 11, 2004Date of Patent: December 12, 2006Assignee: The Research Foundation of State University of New YorkInventors: Stanislaus Wong, Yuanbing Mao
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Patent number: 7138102Abstract: A method for manufacturing a highly-crystallized double oxide powder composed of a single crystal phase which can be used as a phosphor material, a dielectric material, a magnetic material, etc. The method involves forming fine droplets of a raw material solution containing a raw material compound that includes at least one metal element and/or at least one semi-metal element that constitutes a double oxide, and heating these droplets at a high temperature, wherein the raw material solution is a solution which exhibits only one main peak attributable to the decomposition reaction of the raw material compound or a reaction intermediate thereof in a DTA profile when the solution is dried and solidified and subjected to TG-DTA measurement.Type: GrantFiled: July 1, 2003Date of Patent: November 21, 2006Assignee: Shoei Chemical Inc.Inventors: Yuji Akimoto, Kazuro Nagashima, Yoshikazu Nageno, Hidenori Ieda, Naoko Tanaka
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Patent number: 7132092Abstract: A metallized mesoporous silicate which is obtained by (i) reacting (a) either a metal peroxide obtained by the reaction of an aqueous hydrogen peroxide solution with at least one metal or metal compound selected from the group consisting of the following 1) to 4) 1) tungsten 2) molybdenum 3) vanadium 4) compounds comprising 4a) any of tungsten, molybdenum, and vanadium and 4b) at least one element selected from Groups 13 to 16 (excluding oxygen) or a solution of the metal peroxide with (b) a silicon compound in the presence of an alkylamine or a quaternary ammonium salt and separating the resultant silicate; and a process for producing the metallized mesoporous silicate. Also provided is a method of organic synthesis with the silicate.Type: GrantFiled: February 5, 2003Date of Patent: November 7, 2006Assignee: Sumitomo Chemical Company, LimitedInventor: Koji Hagiya
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Patent number: 7125536Abstract: This invention relates to a composition comprising nano-structured metal oxide particles (particularly, zirconia) and at least one stabilizing agent, a method to produce the composition, and a method to produce the thermally stable nano-structured particles. The method to produce the nano-structured particles comprises first preparing a base solution and a nanoparticle precursor solution, then combining these solutions at a final pH 7 or greater to precipitate a colloidal hydrous oxide. The colloidal hydrous oxide is then treated with at least one silicate, phosphate, or aluminum phosphate stabilizing agent and dried. These nano-structured particle products have high thermal stability and are particularly advantageous in applications as catalysts or catalyst supports that operate at high temperatures.Type: GrantFiled: February 6, 2004Date of Patent: October 24, 2006Assignee: Millennium Inorganic Chemicals, Inc.Inventors: Guoyi Fu, BillieJo Monk, Corinne Lehaut
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Patent number: 7118829Abstract: The current invention relates to the preparation of an improved cathode active material for non-aqueous lithium electrochemical cell. In particular, the cathode active material comprises ?-phase silver vanadium oxide prepared by using a ?-phase silver vanadium oxide starting material. The reaction of ?-phase SVO with a silver salt produces the novel ?-phase SVO possessing a lower surface area than ?-phase SVO produced from vanadium oxide (V2O5) and a similar silver salt as starting materials. Consequently, the low surface area ?-phase SVO material provides an advantage in greater long-term stability in pulse dischargeable cells.Type: GrantFiled: September 17, 2004Date of Patent: October 10, 2006Assignee: Wilson Greatbatch Technologies, Inc.Inventors: Randolph Leising, Esther S. Takeuchi
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Patent number: 7105145Abstract: Ferroelectric metal oxide crystalline particles are produced by first producing nanoparticles of a ferroelectric metal oxide and dispersing the nanoparticles in a gas phase. Then, the nanoparticles are processed by heat treatment with the nanoparticles being maintained in the gas phase in a dispersed state. The nanoparticles may be produced by using a laser ablation method. The ferroelectric metal oxide may have a perovskite crystal structure.Type: GrantFiled: October 30, 2002Date of Patent: September 12, 2006Assignee: RIKENInventors: Kwang-Soo Seol, Kazuo Takeuchi, Takeshi Miyagawa, Yoshimichi Ohki
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Patent number: 7033566Abstract: A photocatalyst including a metal oxide semiconductor represented by the formula: In1?xMxAO4 wherein M represents a transition metal element, A represents an element belonging to the Group 5a of the Periodic Table and x is a number greater than 0 but smaller than 1.Type: GrantFiled: July 9, 2002Date of Patent: April 25, 2006Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Hironori Arakawa, Zhigang Zou, Kazuhiro Sayama
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Patent number: 6986879Abstract: A complex metal oxide powder composed of fine particles, each in an approximately spherical shape, is provided by a method for producing a complex metal oxide powder, which method comprises heating at least two kinds of metal salts, or a complex metal salt comprising at least two kinds of metals, to a temperature at which transition to a complex metal oxide occurs, and calcining the metal salts or the complex metal salt in an atmosphere containing a halogenated hydrogen gas.Type: GrantFiled: October 15, 2001Date of Patent: January 17, 2006Assignee: Sumitomo Chemical Company, LimitedInventor: Yoshio Uchida
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Patent number: 6974566Abstract: A process to produce mixed metal oxides and metal oxide compounds. The process includes evaporating a feed solution that contains at least two metal salts to form an intermediate. The evaporation is conducted at a temperature above the boiling point of the feed solution but below the temperature where there is significant crystal growth or below the calcination temperature of the intermediate. The intermediate is calcined, optionally in the presence of an oxidizing agent, to form the desired oxides. The calcined material can be milled and dispersed to yield individual particles of controllable size and narrow size distribution.Type: GrantFiled: September 5, 2001Date of Patent: December 13, 2005Assignee: Altair Nanomaterials Inc.Inventors: Bruce J. Sabacky, Timothy M. Spitler, Jan Prochazka
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Patent number: 6932957Abstract: In one embodiment, a ferroelectric material is processed by placing the material in an environment including metal vapor and heating the material to a temperature below the Curie temperature of the material. This allows the bulk conductivity of the ferroelectric material to be increased without substantially degrading its ferroelectric domain properties. In one embodiment, the ferroelectric material comprises lithium tantalate and the metal vapor comprises zinc.Type: GrantFiled: June 28, 2002Date of Patent: August 23, 2005Assignee: Silicon Light Machines CorporationInventors: Ronald O. Miles, Ludwig L. Galambos, Janos J. Lazar, Gabriel C. Risk, Alexei L. Alexandrovski, Gregory D. Miller, David Caudillo, Joseph M. McRae, Gisele L. Foulon
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Publication number: 20040253515Abstract: The current invention relates to the preparation of an improved cathode active material for non-aqueous lithium electrochemical cell. In particular, the cathode active material comprises &egr;-phase silver vanadium oxide prepared by using a &ggr;-phase silver vanadium oxide starting material. The reaction of &ggr;-phase SVO with a silver salt produces the novel &egr;-phase SVO possessing a lower surface area than &egr;-phase SVO produced from vanadium oxide (V2O5) and a similar silver salt as starting materials. Consequently, the low surface area &egr;-phase SVO material provides an advantage in greater long-term stability in pulse dischargeable cells.Type: ApplicationFiled: June 18, 2004Publication date: December 16, 2004Inventors: Randolph Leising, Esther S. Takeuchi
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Patent number: 6803147Abstract: The current invention relates to the preparation of an improved cathode active material for non-aqueous lithium electrochemical cell. In particular, the cathode active material comprises &egr;-phase silver vanadium oxide prepared by using a &ggr;-phase silver vanadium oxide starting material. The reaction of &ggr;-phase SVO with a silver salt produces the novel &egr;-phase SVO possessing a lower surface area than &egr;-phase SVO produced from vanadium oxide (V2O5) and a similar silver salt as starting materials. Consequently, the low surface area &egr;-phase SVO material provides an advantage in greater long term stability in pulse dischargeable cells.Type: GrantFiled: December 27, 2001Date of Patent: October 12, 2004Assignee: Wilson Greatbatch Technologies, Inc.Inventors: Esther S. Takeuchi, Marcus Palazzo
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Patent number: 6803028Abstract: Methods of manufacturing stoichiometric lithium niobate elements are provided. The method involves heating lithium niobate substrates in the presence of a monolithic sintered source of lithium and/or niobium. The method is useful for producing lithium niobate optical elements such as waveguides, switches and modulators.Type: GrantFiled: April 8, 2002Date of Patent: October 12, 2004Assignee: Corning IncorporatedInventors: Kishor P. Gadkaree, Kamal K. Soni
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Patent number: 6803027Abstract: A process is disclosed for forming a nanosize ceramic powder. A precursor ceramic material is formed of a fugitive constituent and a non-soluble constituent in a single phase. The precursor is contacted with a selective solvent (water, acid, etc.) to form a solution of the fugitive constituent in the solvent and a residue of the non-soluble constituent. The precursor is sufficiently reactive with the solvent to form the solution of the fugitive constituent in the solvent and form the nondissolved residue of the non-soluble constituent. The precursor material and the non-soluble residue are sufficiently insoluble in the solvent such that there is insufficient precursor material and non-soluble residue in solution to deposit and precipitate upon the residue of the non-soluble-constituent.Type: GrantFiled: August 13, 2001Date of Patent: October 12, 2004Assignee: University of Utah Research FoundationInventors: Anil Vasudeo Virkar, Sanjeevani Vidyadhar Bhide
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Publication number: 20040163596Abstract: In one embodiment, a ferroelectric material is processed by placing the material in an environment including metal vapor and heating the material to a temperature below the Curie temperature of the material. This allows the bulk conductivity of the ferroelectric material to be increased without substantially degrading its ferroelectric domain properties. In one embodiment, the ferroelectric material comprises lithium tantalate and the metal vapor comprises zinc.Type: ApplicationFiled: June 28, 2002Publication date: August 26, 2004Inventors: Ronald O. Miles, Ludwig L. Galambos, Janos J. Lazar, Gabriel C. Risk, Alexei L. Alexandrovski, Gregory D. Miller, David Caudillo, Joseph M. McRae, Gisele L. Foulon
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Patent number: 6780394Abstract: A perovskite feedstock (powder or preform) is placed in a high-pressure cell of a high pressure/high temperature (HP/HT) apparatus and subjected to pressures in excess of about 2 kbar and temperatures above about 800° C. for a time adequate to increase the density of the preform.Type: GrantFiled: August 16, 2001Date of Patent: August 24, 2004Assignee: Diamond Innovations, Inc.Inventors: Suresh S. Vagarali, John W. Lucek
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Patent number: 6770256Abstract: Metal oxides having a perovskite or perovskite-like crystal structure are prepared by a process comprising subjecting a mixture of starring powders to a high energy milling sufficient to induce chemical reaction of the components and thereby directly mechanosynthesize said metal oxide in the form of a perovskite or a perovskite-like material having a nanocrystalline structure as determined by X-ray diffractometry. The process according to the present invention is simple, efficient, not expensive and does not require any heating step for producing a perovskite that may easily show a very high specific surface area. Another advantage is that the perovskite obtained according to the present invention also has a high density of lattice defects thereby showing a higher catalytic activity, a characteristic which is highly desirable in their eventual application as catalysts and electronic conductors.Type: GrantFiled: April 9, 2001Date of Patent: August 3, 2004Assignee: Universite LavalInventors: Serge Kaliaguine, André Van Neste
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Patent number: 6762146Abstract: A novel intercalation compound is provided, in which compound monohydric alcohol is intercalated between layers of a layered compound comprising vanadium, phosphorus and oxygen as primary components, characterized in that the monohydric alcohol is aliphatic secondary monohydric alcohol, alicyclic monohydric alcohol, or aromatic monohydric alcohol. By heating the intercalation compound, a vanadium-phosphorus mixed oxide having a BET specific surface area of at least 80 m2/g can be obtained.Type: GrantFiled: October 23, 2001Date of Patent: July 13, 2004Assignee: Tonen Chemical CorporationInventors: Yuichi Kamiya, Eiichiro Nishikawa
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Patent number: 6759164Abstract: A mixture of polymeric binders that is insoluble in nonaqueous organic electrolytes activating alkali metal or alkali metal ion electrochemical cells, is described. The mixed binder formulation provides electrodes that are flexible and non-brittle, and cells incorporating the electrodes are dischargeable at elevated temperatures. A preferred binder formulation is a mixture of polyvinylidene and polyimide binders.Type: GrantFiled: November 27, 2001Date of Patent: July 6, 2004Assignee: Wilson Greatbatch Ltd.Inventors: Marcus Palazzo, Esther S. Takeuchi
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Publication number: 20040120881Abstract: Grain oriented ceramics constituted of a polycrystalline body having a first perovskite-type alkali-pentavalent metal oxide compound as the main phase, in which a specific crystal plane of each grain constituting the polycrystalline body is oriented. The grain oriented ceramics are obtained by molding a mixture of a first anisotropically-shaped powder A of which developed plane has a lattice matching with a specific crystal plane of the first perovskite-type alkali-pentavalent metal oxide compound and a first reaction material capable of reacting with the first anisotropically-shaped powder A thereby forming at least the first perovskite-type alkali-pentavalent metal oxide compound such that the first anisotropically-shaped powder A is oriented, and by heating them.Type: ApplicationFiled: December 11, 2003Publication date: June 24, 2004Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Hisaaki Takao, Yasuyoshi Saito, Toshihiko Tani
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Patent number: 6749966Abstract: Laser pyrolysis can be used to produce directly metal vanadium oxide composite nanoparticles. To perform the pyrolysis a reactant stream is formed including a vanadium precursor and a second metal precursor. The pyrolysis is driven by energy absorbed from a light beam. Metal vanadium oxide nanoparticles can be incorporated into a cathode of a lithium based battery to obtain increased energy densities. Implantable defibrillators can be constructed with lithium based batteries having increased energy densities.Type: GrantFiled: April 1, 2002Date of Patent: June 15, 2004Assignee: NanoGram Devices CorporationInventors: Hariklia Dris Reitz, James P. Buckley, Sujeet Kumar, Yu K. Fortunak, Xiangxin Bi
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Publication number: 20040091781Abstract: A lithium secondary battery of the present invention includes: a positive electrode containing a positive active substance capable of reversibly occluding and releasing lithium; a negative electrode containing a negative active substance capable of reversibly occluding and releasing lithium; and an electrolyte having lithium conductivity, wherein the positive active substance contains an oxide including lithium and transition metal, and a composition ratio among the lithium, the transition metal and oxygen in the oxide is in at least one selected from the following states:Type: ApplicationFiled: November 7, 2003Publication date: May 13, 2004Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Miyuki Nakai, Masashi Shoji, Emiko Igaki, Masakazu Tanahashi
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Patent number: 6699449Abstract: This invention relates to a process for the production of an oxide of a metal A by heating precursors of the oxide of a metal A, in the presence of an oxygen partial pressure control agent comprising an oxide of a metal B that is capable of assuming multiple valence numbers. The process is carried out under a condition that an ionization tendency relationship of Ai+<Bj+<A0 is satisfied, where i is a valence number of the metal A in the oxide to be produced and j is a valence number of the metal B in the oxygen partial pressure control agent.Type: GrantFiled: December 12, 2000Date of Patent: March 2, 2004Assignee: Agency of Industrial Science & Technology, Ministry of International Trade & IndustryInventors: Naoki Shirakawa, Shin-Ichi Ikeda, Hiroshi Bando
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Patent number: 6696201Abstract: An electrochemical cell comprising an anode of a Group IA metal and a cathode of a mixed phase metal oxide prepared from a combination of starting materials comprising vanadium oxide and a mixture of at least one of a decomposable silver-containing constituent and a decomposable copper-containing constituent is described. The starting materials are mixed together to form a homogeneous admixture that is not further mixed once decomposition heating begins. The resulting cathode material is particularly useful for implantable medical applications.Type: GrantFiled: October 26, 2001Date of Patent: February 24, 2004Assignee: Wilson Greatbatch Ltd.Inventors: Randolph A. Leising, Esther S. Takeuchi
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Publication number: 20040005500Abstract: Disclosed is a new vanadium oxide hydrate composition suitable for use as electrode-active material in primary and secondary lithium and lithium ion batteries and a process for its preparation.Type: ApplicationFiled: January 28, 2003Publication date: January 8, 2004Inventor: Carmine Torardi
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Patent number: 6673330Abstract: A single crystal of lithium niobate or lithium tantalate may be grown from a melt of a composition having a molar excess of Li compared to a melt having the stoichiometric amount of lithium, and having a molar fraction of Li2O/(Nb2O5+Li2O) or Li2O/(Ta2O5+Li2O) within a range of at least 0.490 and less than 0.500. The single crystal also has at least one element selected from the group consisting of Mg, Zn, Sc and In, in an amount of from 0.1 to 3.0 mol % based on the total amount of the elements, Nb and Li, or the total amount of the elements, Ta and Li.Type: GrantFiled: March 9, 2000Date of Patent: January 6, 2004Assignee: National Institute for Research in Inorganic MaterialsInventors: Kenji Kitamura, Yasunori Furukawa, Shunji Takekawa, Shigeyuki Kimura
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Publication number: 20030235761Abstract: The present invention is to provide a non-aqueous electrolyte secondary cell and/or battery, which use a brannerite type lithium vanadium molybdenum oxide, LiVMoO5.5. The material synthesized following a simple aqueous solution reaction (ASR) process exhibits both submicronic and nanophase particles having low porosity, demonstrates the high voltage behavior in lithium-containing cells and battery. The present invention also provides a method for producing the above mentioned cathode-active material in bulk quantity by means of ASR process, called sol-gel, xerogel, co-precipitation, hydrothermal, glycine-nitrate soft-combustion process, precursor complexation process (all kinds of carboxylic acid as complexation agents as well as alkoxides). In particular, the method comprises preparing a lithium vanadium molybdenum oxide with brannerite structure (layered) and having molecular formula LiVMoO5.5.Type: ApplicationFiled: April 25, 2003Publication date: December 25, 2003Inventor: S.R. Sahaya Prabaharan
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Patent number: 6653022Abstract: The present invention relates to the use of vanadium oxide nanotubes as electrode material in a rechargeable lithium battery. The invention further provides the method of making and uses for electrodes comprising vanadium oxide nanotubes.Type: GrantFiled: May 31, 2001Date of Patent: November 25, 2003Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Sara Nordlinder, Kristina Edström, Torbjörn Gustafson
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Patent number: 6652829Abstract: A method for continuously calcinating product to form mixed metal oxide powders comprising providing a continuously operated indirectly heated rotary furnace having a heating cavity, introducing raw feedstock including product to be calcined into the heating cavity of the furnace while the heating cavity is maintained at temperature, and maintaining a controlled atmosphere in the heating cavity during the heating of the feedstock, and discharging and recovering the mixed metal oxide powders.Type: GrantFiled: August 13, 2001Date of Patent: November 25, 2003Assignee: Ferro CorporationInventors: Raymond E. Barnes, Richard A. Pipoly, Ivan H. Joyce, Javier Garcia Sainz
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Publication number: 20030206853Abstract: Niobate-based octahedral molecular sieves having significant activity for multivalent cations and a method for synthesizing such sieves are disclosed. The sieves have a net negatively charged octahedral framework, comprising niobium, oxygen, and octahedrally coordinated lower valence transition metals. The framework can be charge balanced by the occluded alkali cation from the synthesis method. The alkali cation can be exchanged for other contaminant metal ions. The ion-exchanged niobate-based octahedral molecular sieve can be backexchanged in acidic solutions to yield a solution concentrated in the contaminant metal. Alternatively, the ion-exchanged niobate-based octahedral molecular sieve can be thermally converted to a durable perovskite phase waste form.Type: ApplicationFiled: May 1, 2003Publication date: November 6, 2003Inventors: Tina M. Nenoff, May D. Nyman
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Patent number: 6641743Abstract: A method for forming waveguides in an optical material such as lithium niobate comprises the steps of providing an exchange agent including a proton-supplying medium and a catalyst, and exposing a selected portion of the optical material to the exchange agent for a predetermined time and at a predetermined temperature. Preferably, the catalyst is a metallic cation having a valence of at least +2, and the proton-supplying medium is a weak acid with a pKa of greater than about 4.5 or a lithium-buffered (“starved”) acidic solution. The catalyst accelerates the rate at which protons are exchanged with corresponding ions in the optical material lattice, thereby reducing the time required to produce a waveguide in the exposed portion of the optical material.Type: GrantFiled: June 19, 2001Date of Patent: November 4, 2003Inventors: Mark L. F. Phillips, Travis P. S. Thoms
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Publication number: 20030198590Abstract: A powder of lithiated manganese oxide has an average particle diameter preferably less than about 250 nm. The particles have a high degree of uniformity and preferably a very narrow particle size distribution. The lithiated manganese oxide can be produce by the reaction of an aerosol where the aerosol comprises both a first metal (lithium) precursor and a second metal (manganese) precursor. Preferably, the reaction involves laser pyrolysis where the reaction is driven by heat absorbed from an intense laser beam.Type: ApplicationFiled: May 13, 2003Publication date: October 23, 2003Applicant: NanoGram CorporationInventors: Sujeet Kumar, Hariklia Dris Reitz, Xiangxin Bi
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Publication number: 20030185742Abstract: To realize constituent elements for realizing a nonaqueous secondary battery having high energy density and high repeating stability, and a nonaqueous secondary battery using the same.Type: ApplicationFiled: March 19, 2003Publication date: October 2, 2003Inventors: Kazuhiro Watanabe, Katsuhiro Nichogi, Norishige Nanai, Akihito Miyamoto, Soji Tsuchiya
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Patent number: 6605264Abstract: The present invention relates to high oxygen ion conducting/oxygen storage (OIC/OS) materials, a catalyst employing the OIC/OS materials, and a method for converting hydrocarbons, carbon monoxide and nitrogen oxides using the catalyst. The OIC/OS materials have significantly higher oxygen storage capacity than that predicted based on Ce content due to the unexpected high and facile redox activity of the added niobium. These materials are further characterized by having a tetragonal crystalline structure under oxidizing conditions (in air) up to about 1,200° C. and a cubic crystalline structure in reducing conditions (5% hydrogen) up to about 1,000° C. for 24 hours. These materials comprise, based upon 100 mole % of the metal component in the material, up to about 95 mole % zirconium, up to about 50 mole % cerium, about 0.5 to about 15 mole % rare earth metal(s), alkaline earth metal(s) or a combination thereof, and about 0.5 to about 15 mole % niobium.Type: GrantFiled: July 16, 2002Date of Patent: August 12, 2003Assignee: Delphi Technologies, Inc.Inventors: Anatoly I. Bortun, John Gerard Nunan
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Patent number: 6596254Abstract: Niobate-based octahedral molecular sieves having significant activity for multivalent cations and a method for synthesizing such sieves are disclosed. The sieves have a net negatively charged octahedral framework, comprising niobium, oxygen, and octahedrally coordinated lower valence transition metals. The framework can be charge balanced by the occluded alkali cation from the synthesis method. The alkali cation can be exchanged for other contaminant metal ions. The ion-exchanged niobate-based octahedral molecular sieve can be backexchanged in acidic solutions to yield a solution concentrated in the contaminant metal. Alternatively, the ion-exchanged niobate-based octahedral molecular sieve can be thermally converted to a durable perovskite phase waste form.Type: GrantFiled: June 8, 2001Date of Patent: July 22, 2003Assignee: Sandia CorporationInventors: Tina M. Nenoff, May D. Nyman
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Publication number: 20030124424Abstract: Disclosed is a positive electrode active material for a lithium ion secondary battery, including lithium-transition metal composite oxide of a layer crystal structure, in which the lithium-transition metal composite oxide contains an element that improves conductivity of electrons in the lithium-transition metal composite oxide. Use of this positive electrode active material can improve cycle characteristics, high rate characteristics and thermal stability of lithium ion secondary batteries. Furthermore, by use of this positive electrode active material, gas generation in batteries can be decreased.Type: ApplicationFiled: December 17, 2002Publication date: July 3, 2003Applicant: Nichia CorporationInventors: Takeshi Takahashi, Masuhiro Morizaki, Atsushi Takeoka, Junichi Tokuno