Including Fluorine Patents (Class 423/464)
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Publication number: 20100072465Abstract: The present invention is generally directed to a bulk barium copper sulfur fluoride (BCSF) material made by combining Cu2S, BaS and BaF2, heating the ampoule between 400 and 550 ° C. for at least two hours, and then heating the ampoule at a temperature between 550 and 950 ° C. for at least two hours. The BCSF material may be doped with potassium, rubidium, or sodium. The present invention also provides for a BCSF transparent conductive thin film made by forming a sputter target by either hot pressing bulk BCSF or hot pressing Cu2S, BaS and BaF2 powders and sputtering a BCSF thin film from the target onto a substrate. The present invention is further directed to a p-type transparent conductive material comprising a thin film of BCSF on a substrate where the film has a conductivity of at least 1 S/cm. The substrate may be a plastic substrate, such as a polyethersulfone, polyethylene terephthalate, polyimide, or some other suitable plastic or polymeric substrate.Type: ApplicationFiled: October 14, 2008Publication date: March 25, 2010Inventors: Jesse A. Frantz, Jasbinder S. Sanghera, Vinh Q. Nguyen, Woohong Kim, Ishwar D. Aggarwal
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Patent number: 7674553Abstract: Disclosed in a positive active material for a lithium secondary battery including a compound represented by formula 1 and having a 10% to 70% ratio of diffracted intensity of diffraction lines in 2?=53° (104 plane) with respect to diffracted intensity of diffraction lines in the vicinity of 2?=22° (003 plane) in X-ray diffraction patterns using a CoK?-ray, LixCoO2-yAy??(1) wherein, x is from 0.90 to 1.04, y is from 0 to 0.5, and A is selected from the group consisting of F, S and P.Type: GrantFiled: February 16, 2005Date of Patent: March 9, 2010Assignee: Samsung SDI Co., Ltd.Inventors: Jung-Joon Park, Su-Ho Song, Wan-Seog Oh, Jae-Chul Um
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Patent number: 7625502Abstract: Crystalline scintillator materials comprising nano-scale particles of metal halides are provided. The nano-scale particles are less than 100 nm in size. Methods are provided for preparing the particles. In these methods, ionic liquids are used in place of water to allow precipitation of the final product. In one method, the metal precursors and halide salts are dissolved in separate ionic liquids to form solutions, which are then combined to form the nano-crystalline end product. In the other methods, micro-emulsions are formed using ionic liquids to control particle size.Type: GrantFiled: March 26, 2007Date of Patent: December 1, 2009Assignee: General Electric CompanyInventors: Brent Allen Clothier, Sergio Paulo Martins Loureiro, Alok Srivastava, Venkat Subramaniam Venkataramani
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Patent number: 7615315Abstract: A positive electrode material for a lithium secondary battery for high voltage high capacity use exhibiting high cycle durability and high safety. The positive electrode material is composed of particles having a composition represented by the general formula: LiaCobMgcAdOeFf (A is the group 6 transition element or the group 14 element, 0.90?a?1.10, 0.97?b?1.00, 0.0001?c?0.03, 0.0001?d?0.03, 1.98?e?2.02, 0?f?0.02 and 0.0001?c+d?0.03), and magnesium, the element A and fluorine exist uniformly in the vicinity of the surfaces of the particles.Type: GrantFiled: August 16, 2004Date of Patent: November 10, 2009Assignee: Seimi Chemical Co., Ltd.Inventors: Koji Tatsumi, Toshiaki Abe, Naoshi Saito, Manabu Suhara
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Publication number: 20090123354Abstract: A solid material is presented for the partial oxidation of natural gas. The solid material includes a solid oxygen carrying agent and a hydrocarbon activation agent. The material precludes the need for gaseous oxygen for the partial oxidation and provides better control over the reaction.Type: ApplicationFiled: November 14, 2007Publication date: May 14, 2009Inventors: Deng-Yang Jan, Joel T. Walenga, Kurt M. Vanden Bussche, Joseph A. Kocal, Lisa M. King
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Patent number: 7476376Abstract: Disclosed is metal composite oxides having the new crystal structure. Also disclosed are ionic conductors including the metal composite oxides and electrochemical devices comprising the ionic conductors. The metal composite oxides have an ion channel formed for easy movement of ions due to crystallographic specificity resulting from the ordering of metal ion sites and metal ion defects within the unit cell. Therefore, the metal composite oxides according to the present invention are useful in an electrochemical device requiring an ionic conductor or ionic conductivity.Type: GrantFiled: April 21, 2005Date of Patent: January 13, 2009Assignee: LG Chem, Ltd.Inventors: Seung Tae Hong, Yun Ho Roh, Eung Je Lee, Mi Hyae Park
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Publication number: 20090011448Abstract: A pretreatment agent for a sample to be subjected to Limulus assay comprising an alkali metal sulfate and/or an alkaline earth metal sulfate wherein the sulfate(s) has a final concentration of 20 mM or more when the sulfate(s) is allowed to contact with the sample, or an alkali metal halide and/or an alkaline earth metal halide wherein the halide(s) has a final concentration of from 0.4 M to 1.2 M or less when the halide(s) is allowed to contact with the sample, or a kit for Limulus assay reagent comprising thereof as a composing article.Type: ApplicationFiled: January 27, 2006Publication date: January 8, 2009Applicant: SEIKAGAKU CORPORATIONInventors: Toshio Oda, Jun Aketagawa
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Publication number: 20080241040Abstract: Crystalline scintillator materials comprising nano-scale particles of metal halides are provided. The nano-scale particles are less than 100 nm in size. Methods are provided for preparing the particles. In these methods, ionic liquids are used in place of water to allow precipitation of the final product. In one method, the metal precursors and halide salts are dissolved in separate ionic liquids to form solutions, which are then combined to form the nano-crystalline end product. In the other methods, micro-emulsions are formed using ionic liquids to control particle size.Type: ApplicationFiled: March 26, 2007Publication date: October 2, 2008Inventors: Brent Allen Clothier, Sergio Paulo Martins Loureiro, Alok Srivastava, Venkat Subramaniam Venkataramani
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Publication number: 20080213163Abstract: Disclosed is a method for producing a BaLiF3 single crystal by a melt growth method, wherein a raw material melt for said single crystal comprising BaF2, LiF and MgF2 in such amounts that the Ba/(Ba+Li+Mg) ratio by mol is in the range of 0.35 to 0.48 and the Mg/(Li+Mg) ratio by mol is in the range of 0.001 to 0.03. In the case where a BaLiF3 single crystal that is useful as a last lens of immersion exposure tools for producing a semiconductor is produced by a melt growth method using, as a raw material, a melt containing excess Li, the Li component is liable to be precipitated to make the resulting BaLiF3 single crystal opaque, and the light transmittance is deteriorated, but such problems can be solved by the present invention.Type: ApplicationFiled: February 21, 2008Publication date: September 4, 2008Applicant: Tokuyama CorporationInventors: Toshiro Mabuchi, Naoto Mochizuki, Teruhiko Nawata, Hiroki Sato, Tsuguo Fukuda
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Publication number: 20080177118Abstract: This invention relates to polyoxometalates represented by the formula (An)m+[My(H2O)pXzZ2W18O66]m? or solvates thereof, wherein A represents a cation acting as counterion of the polyanion, n is the number of the cations A, m is the charge of the polyoxoanion, M represents a transition metal selected from Cu, Zn, Pd, Pt and mixtures thereof, y is the number of transition metals M and is a number from greater than 4 to less than 6, p is a number of water molecules and is a number from 0 to 10, X is a halide selected from F, Cl, Br, I and mixtures thereof, z is a number of halides and is a number from 0 to 6 and Z represents a heteroatom selected from SbIII, BiIII, AsIII, SeIV and TeIV. This invention also relates to a method to make polyoxometalates represented by the formula (II): (An)m+[My(H2O)pXzZ2W18O66]m? or solvates thereof, where y is the number of transition metals M and is a number from greater than 4 to less than or equal to 6, and A, n, m, M p, X, z, Z, are as defined for formula (I).Type: ApplicationFiled: January 19, 2007Publication date: July 24, 2008Inventors: Ulrich Kortz, Sib Sankar Mal
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Publication number: 20080160414Abstract: Provided are a cathode active material for a non-aqueous electrolyte secondary battery with high operating voltage, high volume capacity density, high safety and excellent charge and discharge cyclic properties, and its production method. The cathode active material for a non-aqueous electrolyte secondary battery, which comprises a lithium-containing composite oxide powder, which is represented by the formula LipNxMyOzFa (wherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than the element N, 0.9?p?1.1, 0.965?x<1.00, 0<y?0.035, 1.9?z?2.1, x+y=1 and 0?a?0.02), a surface layer of which contains zirconium, and the surface layer within 5 nm of which has an atomic ratio (zirconium/the element N) of at least 1.0.Type: ApplicationFiled: March 13, 2008Publication date: July 3, 2008Applicant: AGC Seimi Chemical Co., Ltd.Inventors: Yukio Jitsugiri, Yukiko Amagasaki, Takeshi Kawasato, Naoshi Saito, Tokumitsu Kato, Yukimitsu Wakasugi
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Patent number: 7214362Abstract: An object of the present invention is to provide a method for purifying a highly pure niobium compound and/or tantalum compound, the method enabling the purification of a highly pure niobium compound and tantalum compound in a simplified manner at a low cost. The object is met by providing a method comprising adding an organic solvent to an aqueous solution containing a niobium compound and/or tantalum compound together with impurities, and then performing extraction via the solution. A niobium compound and/or tantalum compound dissolved in a solution is allowed to precipitate, and said aqueous solution is obtained by dissolving the precipitate in water.Type: GrantFiled: February 27, 2003Date of Patent: May 8, 2007Assignee: Stella Chemifa Kabushiki KaishaInventors: Hirohisa Kikuyama, Masahide Waki, Hiroto Izumi, Hirofumi Yazaki, Kenji Aoki, Shinji Hashiguchi, Masatsugu Kawawaki, Yuko Murakami
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Patent number: 7211235Abstract: A method is described for the manufacture of hydrotalcites by using at least one compound of a bivalent metal (Component A) and at least one compound of a trivalent metal (Component B), wherein at least one of these components is not used in the form of a solution, characterized in that a) at least one of the Components A and/or B which is not used in the form of a solution, shortly before or during mixing of the components, and/or b) the mixture containing the Components A and B is subjected to intensive grinding until an average particle size (D50) in the range of approx. 0.1 to 5 ?m is obtained, and optionally, after aging treatment or hydrothermal treatment, the resulting hydrotalcite product is separated, dried, and optionally calcinated.Type: GrantFiled: April 18, 2002Date of Patent: May 1, 2007Assignee: Sud-Chemie AGInventors: Max Eisgruber, Jürgen Ladebeck, Jürgen Koy, Hubert Schiessling, Wolfgang Buckl, Herrmann Ebert
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Patent number: 7175823Abstract: The present invention provides a method enabling the high purification of a niobium compound and/or tantalum compound in a simplified manner at a low cost. This is accomplished by providing a method enabling the high purification of a niobium compound and/or tantalum compound comprising the steps of preparing a solution containing niobium and/or tantalum, allowing a precipitate comprising niobium and/or tantalum to develop, separating the precipitate by filtration from the filtrate, converting the precipitate to a liquid melt or taking the filtrate, and separating a niobium compound from a tantalum compound or vice versa by utilizing the difference in solubility to the solvent between the niobium compound and the tantalum compound.Type: GrantFiled: February 27, 2003Date of Patent: February 13, 2007Assignee: Stella Chemifa Kabushiki KaishaInventors: Hirohisa Kikuyama, Masahide Waki, Hiroto Izumi, Hirofumi Yazaki, Kenji Aoki, Shinji Hashiguchi, Masatsugu Kawawaki, Yuko Murakami
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Patent number: 7163649Abstract: A composition formed from Group II fluorides in which the composition has little or no intrinsic birefringence at a selected wavelength. The composition is a mixed solid solution of CaF2 with a second crystal of SrF2 or BaF2. The resulting composition is in the form of Ca1?xSrxF2 or Ca1?xBaxF2, or a combination of SrF2 and BaF2, in the form of Ca1?x?ySrxBayF2. The specific form of the composition that effectively nulls out the intrinsic birefringence at a selected wavelength within the UV range is determined in one preferred method from the magnitudes of the intrinsic birefringences of the components, CaF2, SrF2, and BaF2.Type: GrantFiled: July 9, 2002Date of Patent: January 16, 2007Assignee: The United States of America as represented by the Secretary of CommerceInventors: John H. Burnett, Zachary H. Levine, Eric L. Shirley
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Patent number: 7090722Abstract: Acid-reactive dental fillers, and methods of making and using such fillers, are disclosed. The acid-reactive dental fillers include a trivalent metal, oxygen, fluorine, an alkaline earth metal, and, optionally, silicon. The acid-reactive dental fillers are preferably nanostructured, for example, in the form of nanoparticles.Type: GrantFiled: May 17, 2004Date of Patent: August 15, 2006Assignee: 3M Innovative Properties CompanyInventors: Kenton D. Budd, Jason P. Thalacker, Sumita B. Mitra, Brant U. Kolb, Lani S. Kangas
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Patent number: 7018741Abstract: A particulate positive electrode active material for a lithium secondary cell which satisfies high charge and discharge cyclic durability, high safety, high temperature storage properties, a high discharge average voltage, large current discharge properties, a high weight capacity density, a high volume capacity density, etc. in a well-balanced manner is provided. A particulate positive electrode active material for a lithium secondary cell, which is represented by the formula LipCoxMyOzFa (wherein M is at least one element selected from Groups 2 to 8, 13 and 14 of the Periodic Table, 0.9?p?1.1, 0.980?x?0.9999, 0.0001?y?0.02, 1.9?z?2.1, 0.9?x+y?1 and 0.0001?a?0.02), wherein fluorine atoms and element M are unevenly distributed on the particle surface, the atomic ratio of fluorine atoms to cobalt atoms (a/x) is from 0.0001 to 0.02, and in powder X-ray diffraction using CuK?-ray, the half value width of the angle of diffraction on (110) plane is from 0.06 to 0.Type: GrantFiled: August 12, 2004Date of Patent: March 28, 2006Assignee: Seimi Chemical Co., Ltd.Inventors: Manabu Suhara, Naoshi Saito, Tsutomu Kato, Megumi Yukawa
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Patent number: 6979434Abstract: The object of the present invention is to provide a method of producing low oxygen-containing potassium fluorotantalate crystals or low oxygen-containing potassium fluoroniobate crystals, the crystals obtained by the production method, and a method of analyzing oxygen contained in these crystals. The method of producing low oxygen-containing potassium fluorotantalate crystals comprises generating recrystallized potassium fluorotantalate crystals by controlled cooling of a saturated solution of potassium fluorotantalate containing hydrofluoric acid as an essential component, collecting the generated recrystallized crystals through filtration, and drying the collected recrystallized crystals in a drying apparatus so as to obtain the crystals, and the production method is characterized in that the saturated solution of potassium fluorotantalate containing hydrofluoric acid as an essential component contains hydrofluoric acid in a concentration of 0.5 mol/l to 10 mol/l.Type: GrantFiled: September 25, 2002Date of Patent: December 27, 2005Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Yoshitsugu Uchino, Masanori Kinoshita
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Patent number: 6960331Abstract: The invention provides a novel method for making lithium mixed metal materials in electrochemical cells. The lithium mixed metal materials comprise lithium and at least one other metal besides lithium. The invention involves the reaction of a metal compound, a phosphate compound, with a reducing agent to reduce the metal and form a metal phosphate. The invention also includes methods of making lithium metal oxides involving reaction of a lithium compound, a metal oxide with a reducing agent.Type: GrantFiled: October 9, 2003Date of Patent: November 1, 2005Assignee: Valence Technology, Inc.Inventors: Jeremy Barker, M. Yazid Saidi, Jeffrey Swoyer
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Patent number: 6949233Abstract: A method for preparing a positive active material for a rechargeable lithium battery is provided. In this method, a lithium source, a metal source, and a doping liquid including a doping element are mixed and the mixture is heat-treated.Type: GrantFiled: February 13, 2002Date of Patent: September 27, 2005Assignee: Samsung SDI Co., Ltd.Inventors: Ho-Jin Kweon, Jun-Won Suh, Geun-Bae Kim
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Patent number: 6929784Abstract: A ClF3 gas generation system is provided with supply sources of chlorine (3) (for example a cylinder of compressed chlorine) and fluorine (4) (for example a fluorine generator) connected into a gas reaction chamber (2) enabling generation of ClF3 gas. The reaction chamber has a valved outlet (C) for the supply of the ClF3 gas to a process chamber for immediate local use.Type: GrantFiled: March 6, 2000Date of Patent: August 16, 2005Assignee: Surface Technology Systems plcInventors: Jyoti Kiron Bhardwaj, Nicholas Shepherd, Leslie Michael Lea, Graham Hodgson
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Patent number: 6860941Abstract: It is an object to provide a product having a good crystal particle size distribution of a high-purity potassium fluorotantalate crystal or a high-purity potassium fluoroniobate crystal without using a physical method for particle classification. To that end, a method for manufacturing a high-purity potassium fluorotantalate crystal or a high-purity potassium fluoroniobate crystal is used, wherein the recrystallizing step comprising a first cooling process of cooling a saturated solution with a temperature of 60° C. to 90° C. obtained in the dissolving step at a cooling speed of T° C./hour until the solution temperature of the saturated solution becomes a temperature of the range of 35 to 50° C., and a second cooling process of cooling the solution at a cooling speed of [T?18]° C./hour to [T?1]° C./hour from the end of the first cooling process to the solution temperature becoming a temperature of 10 to 20° C.Type: GrantFiled: April 2, 2002Date of Patent: March 1, 2005Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Yoshio Sohama, Hiromichi Isaka, Kenji Higashi, Masanori Kinoshita
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Patent number: 6838023Abstract: 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: GrantFiled: August 3, 2001Date of Patent: January 4, 2005Assignee: E. I. du Pont de Nemours and CompanyInventor: Carmine Torardi
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Patent number: 6800268Abstract: Disclosed herein is a method for producing potassium fluoroniobate crystals by which highly pure, large-sized potassium fluoroniobate crystals can be obtained in high yield and which is advantageous from the viewpoints of material cost and material-dissolving operation; and potassium fluoroniobate crystals. This production method comprises the first and second steps (a) and (b) of (a) adding a potassium-containing electrolyte to a starting material comprising niobium to precipitate potassium oxyfluoroniobate and/or fluoroniobate as coarse crystals, and separating the coarse crystals by filtration, and (b) dissolving the coarse crystals in a recrystallization solvent that is an aqueous solution comprising 12 to 35% by weight of hydrofluoric acid and that has been heated to a temperature of 50° C. or more, and cooling the solution to 40° C. or lower at a cooling rate of less than 20° C./h to precipitate potassium fluoroniobate as crystals.Type: GrantFiled: July 26, 2002Date of Patent: October 5, 2004Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Yoshitsugu Uchino, Masanori Kinoshita
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Publication number: 20040151655Abstract: Novel methods for producing alkali metal fluorozincates, especially potassium fluorozincate. Products having defined particle size ranges are obtained depending on the sequence of introduction of the reactants alkali metal hydroxide, zinc oxide and hydrogen fluoride. The resulting alkali metal fluorozincates are particularly suitable for use as a fluxing agent or fluxing agent additive during brazing of aluminum or aluminum alloys and can be applied by wet or dry fluxing methods depending on the particle size of the alkali metal fluorozincate particles.Type: ApplicationFiled: December 31, 2003Publication date: August 5, 2004Applicant: Solvay Fluor und Derivate GmbHInventors: Ulrich Seseke-Koyro, Andreas Becker, Joachim Frehse
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Patent number: 6767665Abstract: The invention relates to a method for producing molten salts and their mixings, using an extruder. The starting materials are melted and reacted and the products of the reaction are then guided via a column with alkali salt.Type: GrantFiled: June 8, 2001Date of Patent: July 27, 2004Assignee: BASF AktiengesellschaftInventors: Hans-Leonhard Ohrem, Susanne Brzezinski
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Patent number: 6764669Abstract: Disclosed herein is a method for producing potassium fluorotantalate crystals, comprising heating, to 60° C. or higher, a starting solution prepared by adding hydrofluoric acid and hydrochloric acid, and, if necessary, water to a highly pure tantalum solution, adding potassium chloride to this starting solution, and cooling the mixture to 40° C. or lower at a cooling rate of less than 15° C./h to precipitate potassium fluorotantalate crystals, wherein the concentration of the hydrofluoric acid in the starting solution is not more than 20% by weight. By this method, highly pure, large-sized potassium fluorotantalate crystals can successfully be obtained in high yield. Moreover, disadvantages to equipment and operation in the prior art can be overcome to a significant extent with this method.Type: GrantFiled: April 26, 2002Date of Patent: July 20, 2004Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Hiromichi Isaka, Kenji Higashi, Yoshitsugu Uchino, Shigeru Kuwabara
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Patent number: 6743409Abstract: Novel methods for producing alkali metal fluorozincates, especially potassium fluorozincate. Products having defined particle size ranges are obtained depending on the sequence of introduction of the reactants alkali metal hydroxide, zinc oxide and hydrogen fluoride. The resulting alkali metal fluorozincates are particularly suitable for use as a fluxing agent or fluxing agent additive during brazing of aluminum or aluminum alloys and can be applied by wet or dry fluxing methods depending on the particle size of the alkali metal fluorozincate particles.Type: GrantFiled: October 2, 2002Date of Patent: June 1, 2004Assignee: Solvay Fluor and Derivative GmbHInventors: Ulrich Seseke-Koyro, Andreas Becker, Joachim Frehse
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Publication number: 20040091410Abstract: A process of preparing an inorganic compound is disclosed, comprising the steps of (a) allowing at least an inorganic raw material compounds (A) and an inorganic raw material compound (B) which are different in solubility in water to react with each other in the presence of a reaction solvent with stirring to deposit an inorganic compound (C), while allowing a part of each of the compound (A) and compound (B) to exist as a solid; andType: ApplicationFiled: October 29, 2003Publication date: May 13, 2004Applicant: Konica Minolta Holdings, Inc.Inventors: Hiroki Nakane, Syoji Matsuzaka
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Patent number: 6713039Abstract: A lithium-manganese oxide for use in a lithium secondary cell cathode, having a spinel structure expressed by a chemical compositional formula of LixMn2O4-zFz (1.12≦X≦1.20, 0<Z<0.16) and having a lattice constant ranging from 8.220 to 8.230 Å, the lithium-manganese oxide including electrolytic or chemically synthesized manganese dioxide, lithium salt, and fluoride.Type: GrantFiled: June 28, 2001Date of Patent: March 30, 2004Assignee: Kyushu Ceramics Industry Co., Ltd.Inventors: Hiroyuki Tabata, Kazue Matsui, Noriko Anan
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Patent number: 6682712Abstract: The present invention provides a novel thermal solid state method for the synthesis of lithium hexfluoroarsenate either in a two step or a single step method, preferably at last substantially in the solid state.Type: GrantFiled: March 29, 2002Date of Patent: January 27, 2004Assignee: Council of Scientific & Industrial ResearchInventors: Subramanian Angaiah, Vasudevan Thiagarajan, Gnagadharan Ramaiyer, Raghavan Meenakshisundaram
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Publication number: 20030190279Abstract: The present invention provides a novel thermal solid state method for the synthesis of lithium hexfluoroarsenate either in a two step or a single step method, preferably at last substantially in the solid state.Type: ApplicationFiled: March 29, 2002Publication date: October 9, 2003Applicant: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCHInventors: Subramanian Angaiah, Vasudevan Thiagarajan, Gnagadharan Ramaiyer, Raghavan Meenakshisundaram
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Patent number: 6620347Abstract: A crystal filter and a method of making a crystal filter capable of transmitting radiation within a particular pass band is disclosed. The crystal filter is particularly appropriate for a UV detection system, where the pass band is between about 200 to about 350 nm. A UV detection system incorporating the crystal filter is also described. One embodiment of crystal filter is formed from a single-crystal transparent host, such as a fluoride host, codoped with lanthanide or actinide fluorides and lanthanide or actinide nitrides, oxides, borides, carbides or hydroxides. Filter crystals according to the present invention can be grown by various crystal growth methods, including Czochralski and Bridgeman crystal growth methods.Type: GrantFiled: October 6, 1999Date of Patent: September 16, 2003Assignee: Coherent, Inc.Inventor: Dominic N. Lo Iacono
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Patent number: 6589695Abstract: Disclosed is a method of preparing a positive active material for a rechargeable lithium battery. In this method, a lithium salt is reflux-reacted with a metal salt in a basic solution. The positive active material has a spherical or sperical-like form, diameter of 10 nm to 10 &mgr;m, and a surface area of 0.1 to 5 m2/g.Type: GrantFiled: January 22, 2001Date of Patent: July 8, 2003Assignee: Samsung SDI Co., Ltd.Inventors: Ho-Jin Kweon, Sung-Kyun Jang, Young-Uk Kwon
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Publication number: 20030086861Abstract: Novel methods for producing alkali metal fluorozincates, especially potassium fluorozincate. Products having defined particle size ranges are obtained depending on the sequence of introduction of the reactants alkali metal hydroxide, zinc oxide and hydrogen fluoride. The resulting alkali metal fluorozincates are particularly suitable for use as a fluxing agent or fluxing agent additive during brazing of aluminum or aluminum alloys and can be applied by wet or dry fluxing methods depending on the particle size of the alkali metal fluorozincate particles.Type: ApplicationFiled: October 2, 2002Publication date: May 8, 2003Applicant: Solvay Fluor und Derivative GmbHInventors: Ulrich Seseke-Koyro, Andreas Becker, Joachim Frehse
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Patent number: 6555078Abstract: The present invention provides an inexpensive process for the preparation of lithium salts of formula LiX having a desired or required level of purity using lithium chloride and lithium sulfate. In the process of the invention, a lithium salt selected from lithium chloride, lithium sulfate, and combinations thereof is reacted with NaX or KX in a aqueous, semiaqueous, or organic solution and the precipitated salts are removed to obtain the LiX solution of desired purity. Preferably, a semiaqueous solution containing water and an organic solvent is used at some point in the reaction. The process of the invention eliminates the use of highly acidic materials and thus reduces the cost of raw materials and the need for specialized equipment.Type: GrantFiled: September 16, 1997Date of Patent: April 29, 2003Assignee: FMC CorporationInventor: Vijay Chandrakant Mehta
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Publication number: 20030068267Abstract: Disclosed herein is a method for producing potassium fluorotantalate crystals, comprising heating, to 60° C. or higher, a starting solution prepared by adding hydrofluoric acid and hydrochloric acid, and, if necessary, water to a highly pure tantalum solution, adding potassium chloride to this starting solution, and cooling the mixture to 40° C. or lower at a cooling rate of less than 15° C./h to precipitate potassium fluorotantalate crystals, wherein the concentration of the hydrofluoric acid in the starting solution is not more than 20% by weight. By this method, highly pure, large-sized potassium fluorotantalate crystals can successfully be obtained in high yield. Moreover, disadvantages to equipment and operation in the prior art can be overcome to a significant extent with this method.Type: ApplicationFiled: April 26, 2002Publication date: April 10, 2003Inventors: Hiromichi Isaka, Kenji Higashi, Yoshitsugu Uchino, Shigeru Kuwabara
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Publication number: 20030049196Abstract: Disclosed herein is a method for producing potassium fluoroniobate crystals by which highly pure, large-sized potassium fluoroniobate crystals can be obtained in high yield and which is advantageous from the viewpoints of material cost and material-dissolving operation; and potassium fluoroniobate crystals. This production method comprises the first and second steps (a) and (b) of (a) adding a potassium-containing electrolyte to a starting material comprising niobium to precipitate potassium oxyfluoroniobate and/or fluoroniobate as coarse crystals, and separating the coarse crystals by filtration, and (b) dissolving the coarse crystals in a recrystallization solvent that is an aqueous solution comprising 12 to 35% by weight of hydrofluoric acid and that has been heated to a temperature of 50° C. or more, and cooling the solution to 40° C. or lower at a cooling rate of less than 20° C./h to precipitate potassium fluoroniobate as crystals.Type: ApplicationFiled: July 26, 2002Publication date: March 13, 2003Inventors: Yoshitsugu Uchino, Masanori Kinoshita
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Publication number: 20030012724Abstract: A composition formed from Group II fluorides in which the composition has little or no intrinsic birefringence at a selected wavelength. The composition is a mixed solid solution of CaF2 with a second crystal of SrF2 or BaF2. The resulting composition is in the form of Ca1−xSrxF2 or Ca1−xBaxF2, or a combination of SrF2 and BaF2, in the form of Ca1−x−ySrxBayF2. The specific form of the composition that effectively nulls out the intrinsic birefringence at a selected wavelength within the UV range is determined in one preferred method from the magnitudes of the intrinsic birefringences of the components, CaF2, SrF2, and BaF2.Type: ApplicationFiled: July 9, 2002Publication date: January 16, 2003Inventors: John H. Burnett, Zachary H. Levine, Eric L. Shirley
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Publication number: 20020150820Abstract: The present invention provides a positive electrode active material containing a composite oxide having a composition represented by a structural formula (1) given below:Type: ApplicationFiled: January 22, 2002Publication date: October 17, 2002Inventors: Hideyuki Kanai, Motoya Kanda, Koichi Kubo
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Publication number: 20020142225Abstract: A positive active material composition for a rechargeable lithium battery includes at least one lithiated compound, and at least one additive compound selected from the group consisting of a thermal-absorbent element-included hydroxide, a thermal-absorbent element-included oxyhydroxide, a thermal-absorbent element-included oxycarbonate, and a thermal-absorbent element-included hydroxycarbonate.Type: ApplicationFiled: March 7, 2002Publication date: October 3, 2002Inventors: Ho-Jin Kweon, Jun-Won Suh, Hyun-Sook Jung
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Patent number: 6406677Abstract: Processes are provided for preparation of precursors of Group III-V compounds, i.e., nitrides, phosphides, arsenides, antimonides and bismuthides of boron, aluminum, gallium and indium. The precursors are easily converted, e.g., by thermal decomposition, to the Group III-V compounds which are useful as thin-film coatings for aerospace components or as powders which may be shaped as desired.Type: GrantFiled: July 12, 1999Date of Patent: June 18, 2002Assignee: Eltron Research, Inc.Inventors: Michael T. Carter, William J. Donahue
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Patent number: 6383459Abstract: A direct dissolution method for the purification of technical grade hydrated ammonium tantalum oxide (HATO), (NH4)2−xHxTa2O6.nH2O), and related compounds such as tantalum hydroxide and tantalum oxide is described. The method preferably uses ammonium bifluoride as fluoride source in place of the hydrofluoric acid used in the conventional methods. Other fluoride compounds such as NaF, KF, and CaF2 may be used.Type: GrantFiled: August 31, 2000Date of Patent: May 7, 2002Assignee: Osram Sylvania Inc.Inventors: Raj P. Singh, Michael J. Miller
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Publication number: 20020044906Abstract: A lithium-manganese oxide for use in a lithium secondary cell cathode, having a spinel structure expressed by a chemical compositional formula of LixMn2O4-zFz (1.12≦X≦1.20, 0<Z<0.16) and having a lattice constant ranging from 8.220 to 8.230 Å, the lithium-manganese oxide including electrolytic or chemically synthesized manganese dioxide, lithium salt, and fluoride.Type: ApplicationFiled: June 28, 2001Publication date: April 18, 2002Inventors: Hiroyuki Tabata, Kazue Matsui, Noriko Anan
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Publication number: 20010008540Abstract: It is an object of the present invention to provide a calcium fluoride crystal in which the light transparency does not deteriorate with consecutive irradiation by high output short wavelength light over long time periods. A calcium fluoride crystal in accordance with the present invention has an internal transmittance of 70% or more for light of 135-nm wavelength or over. A calcium fluoride crystal contains any one of strontium, aluminum, silicon and magnesium, with the strontium content ranging from 1 ppm to 600 ppm, the aluminum content ranging from 1 ppm to 50 ppm, the silicon content ranging from 1 ppm to 50 ppm, or the magnesium content ranging from 1 ppm to 10 ppm. A calcium fluoride crystal has an internal transmittance of 70% or more for light of 135-nm wavelength or over and contains 1 ppm or less of La and 10 ppm or less of Y. An optical system for an excimer laser in accordance with the present invention comprises a lens comprising any calcium fluoride crystal set forth above.Type: ApplicationFiled: March 21, 1997Publication date: July 19, 2001Inventors: TOMORU OBA, TOSHIO ICHIZAKI
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Patent number: 6132488Abstract: A treating method of recovering zinc in the metal state from a waste containing the zinc in the oxide state, lead, chlorine, fluorine, and water comprising a mixing process 90 of obtaining a to-be-treated mixed material 70 by mixing a steel dust 7 and a reducing material 8 together; a chlorine recovery process 91 of recovering the chlorine and the water by heating the to-be-treated mixed material 70; a lead recovery process 92 of recovering fluorine and lead by heating the to-be-treated mixed material 70 under vacuum; a zinc recovery process 93 of recovering metallic zinc by heating the to-be-treated mixed material 70 at a temperature higher than that in the lead recovery process 92 with the vacuum state maintained so as to reduce and vaporize zinc; and a residue recovery process 94 of recovering a residue 79 of the to-be-treated mixed material 70. This construction allows the metallic zinc to be recovered at a high purity from a zinc oxide-containing waste and an on-site treatment to be accomplished.Type: GrantFiled: August 14, 1998Date of Patent: October 17, 2000Assignees: Aichi Steel Works, Ltd., Toyota Jidosha Kabushiki Kaisha, Toyokin Co., Ltd.Inventors: Toshikatu Hara, Hirohiko Sasamoto, Yuji Okada, Kazuhiro Suzuki
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Patent number: 6087042Abstract: Disclosed is a positive electrode material for a secondary lithium battery excellent in high temperature cycle characteristics which is a lithium manganese oxyfluoride having a spinel structure, wherein the oxyfluoride has a composition represented by the composition formula:Li.sub.1+x Mn.sub.2-x O.sub.4-y F.sub.zwherein x represents a number of from 0.0133 to 0.3333; y represents a number of from 0 to 0.2 (exclusive of 0); and z represents a number of from 0.01 to 0.2 (exclusive of 0.01), with the proviso that (y-z) is more than 0 but not more than 0.07. The positive electrode material for a secondary lithium battery of the present invention exhibits not only a high cycle durability of charge/discharge but also a minimum drop of a charge/discharge initial capacity to provide a high energy density.Type: GrantFiled: February 23, 1999Date of Patent: July 11, 2000Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Jun Sugiyama, Tsuyoshi Sasaki, Tatsuya Hatanaka, Tatsuo Noritake, Tatsumi Hioki
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Patent number: 6060031Abstract: The device and method of the invention provide a neutralizing compound that reacts with acid gases generated in laser exhaust to yield an insoluble non-toxic powder.Type: GrantFiled: July 27, 1998Date of Patent: May 9, 2000Assignee: TRW Inc.Inventor: Peter M. Livingston
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Patent number: 6010676Abstract: Highly pure tantalum compounds are made by slurrying hydrated ammonium tantalum oxide or tantalum hydroxide with concentrated sulfuric acid followed by dissolution with concentrated hydrofluoric acid. After diluting the concentrated acidic solution with water, a soluble potassium compound is added to precipitate a highly pure potassium fluorotantalate. Further steps are used to convert the highly pure potassium fluorotantalate into a highly pure tantalum oxide.Type: GrantFiled: September 12, 1997Date of Patent: January 4, 2000Assignee: Osram Sylvania Inc.Inventors: Raj P. Singh, Michael J. Miller
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Patent number: 6004697Abstract: A method of improving certain vanadium oxide formulations is presented. The method concerns fluorine doping formulations having a nominal formula of LiV.sub.3 O.sub.8. Preferred average formulations are provided wherein the average oxidation state of the vanadium is at least 4.6. Herein preferred fluorine doped vanadium oxide materials, electrodes using such materials, and batteries including at least one electrode therein comprising such materials are provided.Type: GrantFiled: December 5, 1997Date of Patent: December 21, 1999Assignees: Minnesota Mining & Manufacturing Co., Hydro-Quebec CorporationInventors: Michael M. Thackeray, Arthur J. Kahaian, Donald R. Visser, Dennis W. Dees, Roy Benedek