Binary Compound Patents (Class 423/278)
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Patent number: 11066331Abstract: A material including a body including B6OX can include lattice constant c of at most 12.318. X can be at least 0.85 and at most 1. In a particular embodiment, 0.90?X?1. In another particular embodiment, lattice constant a can be at least 5.383 and lattice constant c can be at most 12.318. In another particular embodiment, the body can consist essentially of B6OX.Type: GrantFiled: April 26, 2019Date of Patent: July 20, 2021Assignee: SAINT-GOBAIN CERAMICS & PLASTICS, INC.Inventor: Brian C. LaCourse
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Patent number: 9371255Abstract: The present invention relates to mixed oxide compositions, to the use thereof as a catalyst for cleavage of alkyl tert-alkyl ethers or tertiary alcohols, and to a process for cleaving alkyl tert-alkyl ethers or tertiary alcohols to isoolefins and alcohol or water.Type: GrantFiled: March 7, 2012Date of Patent: June 21, 2016Assignee: Evonik Degussa GmbHInventors: Markus Winterberg, Christian Böing, Dietrich Maschmeyer, Asli Nau, Horst-Werner Zanthoff, Thomas Quandt, Christian Schulze Isfort
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Publication number: 20150129089Abstract: A hydrogen-free amorphous dielectric insulating film having a high material density and a low density of tunneling states is provided. The film is prepared by e-beam deposition of a dielectric material on a substrate having a high substrate temperature Tsub under high vacuum and at a low deposition rate. In an exemplary embodiment, the film is amorphous silicon having a density greater than about 2.18 g/cm3 and a hydrogen content of less than about 0.1%, prepared by e-beam deposition at a rate of about 0.1 nm/sec on a substrate having Tsub=400° C. under a vacuum pressure of 1×10?8 Torr.Type: ApplicationFiled: November 12, 2014Publication date: May 14, 2015Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Xiao Liu, Daniel R. Queen, Frances Hellman
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Patent number: 8900423Abstract: A method for forming boron oxide films formed using reactive sputtering. The boron oxide films are candidates as an anti-reflection coating. Boron oxide films with a refractive index of about 1.38 can be formed. The boron oxide films can be formed using power densities between 2 W/cm2 and 11 W/cm2 applied to the target. The oxygen in the reactive sputtering atmosphere can be between 40 volume % and 90 volume %.Type: GrantFiled: December 14, 2012Date of Patent: December 2, 2014Assignee: Intermolecular, Inc.Inventors: Guowen Ding, Mohd Fadzli Anwar Hassan, Minh Huu Le, Zhi-Wen Sun, Yu Wang
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Patent number: 8865100Abstract: The present application is directed to a method and system for monetizing energy. More specifically, the invention is directed to the economically efficient utilization of remote or stranded natural gas resources. The invention includes importing a high energy density material into an energy market and distributing the high energy density material (HEDM) therein. The HEDM is produced from reduction of a material oxide such as boria into the HEDM, which may be boron. The reduction utilizes remote hydrocarbon resources such as stranded natural gas resources.Type: GrantFiled: April 9, 2009Date of Patent: October 21, 2014Assignee: ExxonMobil Upstream Research CompanyInventors: Bruce T. Kelley, Harry W. Deckman, Stephen Mark Davis, Frank Hershkowitz
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Publication number: 20140286846Abstract: A process for preparing a mesoporous metal oxide, i.e., transition metal oxide, Lanthanide metal oxide, a post-transition metal oxide and metalloid oxide. The process comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to form the mesoporous metal oxide. A mesoporous metal oxide prepared by the above process. A method of controlling nano-sized wall crystallinity and mesoporosity in mesoporous metal oxides. The method comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to control nano-sized wall crystallinity and mesoporosity in the mesoporous metal oxides. Mesoporous metal oxides and a method of tuning structural properties of mesoporous metal oxides.Type: ApplicationFiled: September 25, 2013Publication date: September 25, 2014Applicant: UNIVERSITY OF CONNECTICUTInventors: Steven L. Suib, Altug Suleyman Poyraz
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Publication number: 20140227158Abstract: Methods of preparing boron suboxide are provided herein. In some embodiments, a method for preparing boron suboxide may include loading elemental boron powder into a furnace; purging the furnace by flowing a first gas comprising one of nitrogen or an inert gas into the furnace; heating the boron powder in a reactive atmosphere comprising a mixture of argon and a non-reducing oxygen-containing gas to convert elemental boron powder into boron suboxide powder, wherein the amount of oxygen in the reactive atmosphere is no greater than about 1%.Type: ApplicationFiled: February 14, 2013Publication date: August 14, 2014Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-IInventors: Robert J. Pavlacka, Gary A. Gilde
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Publication number: 20140170049Abstract: A method for forming boron oxide films formed using reactive sputtering. The boron oxide films are candidates as an anti-reflection coating. Boron oxide films with a refractive index of about 1.38 can be formed. The boron oxide films can be formed using power densities between 2 W/cm2 and 11 W/cm2 applied to the target. The oxygen in the reactive sputtering atmosphere can be between 40 volume % and 90 volume %.Type: ApplicationFiled: December 14, 2012Publication date: June 19, 2014Applicant: INTERMOLECULAR, INC.Inventors: Guowen Ding, Mohd Fadzli Anwar Hassan, Minh Huu Le, Zhi-Wen Sun, Yu Wang
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Patent number: 8609053Abstract: The present invention provides a process for the preparation of nanowires of metal oxides with dopant elements in lower valence state. The nanomaterials/materials with dopants in lower valence state are important as these exhibit markedly different characteristics than higher valence state materials of same composition. Nanowires show markedly enhanced properties in lateral direction. The invented process presents a procedure for preparation of different types of nanowires in oxide form that are useful for different applications. In this a precursor is ignited in a specially designed container/enclosure that produces the product with the described features. The process is simple and involves a single step/stage is of very short time per batch. The invention provides a process, which gives controlled size of nanowires and is suitable for the production of nanowires/nanomaterials of desired metal oxides with dopant elements in valence state.Type: GrantFiled: June 6, 2008Date of Patent: December 17, 2013Assignee: Council of Scientific & Industrial ResearchInventors: Harish Chander, Virendra Shanker, Divi Haranath, Pooja Sharma
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Patent number: 8535633Abstract: Process for the production of doped metal oxide particles, wherein the doping component is present on the surface in the form of domains, wherein in a first reaction zone, an oxidizable and/or —hydrolysable metal compound as dopant together with an atomization gas is atomized into a flow of metal oxide particles in a carrier gas, wherein the mass flow of the metal oxide particles und —the mass flow of the dopant are selected such that the doped metal oxide particles contain 10 ppm to 10 wt.Type: GrantFiled: October 10, 2006Date of Patent: September 17, 2013Assignee: Evonik Degussa GmbHInventors: Kai Schumacher, Rainer Golchert, Helmut Roth, Harald Alff, Matthias Rochnia
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Publication number: 20120160478Abstract: A well tool can include a flow path, and a flow blocking device which selectively prevents flow through the flow path. The device can include an anhydrous boron compound. A method of constructing a downhole well tool can include forming a structure of a solid mass comprising an anhydrous boron compound, and incorporating the structure into the well tool.Type: ApplicationFiled: February 27, 2012Publication date: June 28, 2012Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Bradley L. TODD, Thomas D. WELTON, Luke W. HOLDERMAN, Ivan SULEIMAN
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Patent number: 8197780Abstract: A method of producing a boron suboxide composite material having improved fracture toughness.Type: GrantFiled: May 4, 2011Date of Patent: June 12, 2012Assignee: Element Six (Production) (Pty) Ltd.Inventors: Geoffrey John Davies, Iakovos Sigalas, Mathias Herrmann, Thembinkosi Shabalala
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Patent number: 7976941Abstract: A low viscosity filler boron nitride agglomerate particles having a generally spherical shape bound together by an organic binder and to a process for producing a BN powder composition of spherically shaped boron nitride agglomerated particles having a treated surface layer which controls its viscosity.Type: GrantFiled: January 6, 2006Date of Patent: July 12, 2011Assignee: Momentive Performance Materials Inc.Inventors: David Lodyga, Joseph W. Tereshko, Ajit Sane, Thomas Fox, Paulo Meneghetti
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Patent number: 7955579Abstract: A boron suboxide composite material having improved fracture toughness consists of particulate or granular boron suboxide distributed in a binder phrase, such as AlxByOz, for example.Type: GrantFiled: September 6, 2006Date of Patent: June 7, 2011Assignee: Element Six (Production) (Pty) Ltd.Inventors: Geoffrey John Davies, Iakovos Sigalas, Mathias Herrmann, Thembinkosi Shabalala
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Patent number: 7927518Abstract: The invention relates to a metal boride precursor mixture comprising a metal oxide and a boric oxide combined in such a manner so as to produce intimately linked clusters wherein the boric oxide is found within the metal oxide. Furthermore, the invention discloses a carbon composite material made with the metal boride precursor mixture and a carbonaceous component. Finally, the invention also teaches the process for preparing the metal boride precursor mixture comprising steps of providing a metal oxide and a boron oxide, mechanically mixing the metal oxide and the boron oxide at a temperature that liquefies the boron oxide and may impregnate the metal oxide to produce an intimately linked cluster of metal oxide and boric oxide.Type: GrantFiled: November 1, 2007Date of Patent: April 19, 2011Assignee: Alcan International LimitedInventors: Martin Dionne, Jean-Paul Robert Huni
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Publication number: 20110059001Abstract: The present application is directed to a method and system for monetizing energy. More specifically, the invention is directed to the economically efficient utilization of remote or stranded natural gas resources. The invention includes importing a high energy density material into an energy market and distributing the high energy density material (HEDM) therein. The HEDM is produced from reduction of a material oxide such as boria into the HEDM, which may be boron. The reduction utilizes remote hydrocarbon resources such as stranded natural gas resources.Type: ApplicationFiled: April 9, 2009Publication date: March 10, 2011Inventors: Bruce T. Kelley, Harry W. Deckman, Stephen Mark Davis, Frank Hershkowitz
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Publication number: 20100322836Abstract: The present invention discloses a continuous calcination vessel which can be used to prepare calcined chemically-treated solid oxides from solid oxides and chemically-treated solid oxides. A process for the continuous preparation of calcined chemically-treated solid oxides is also provided. Calcined chemically-treated solid oxides disclosed herein can be used in catalyst compositions for the polymerization of olefins.Type: ApplicationFiled: June 23, 2009Publication date: December 23, 2010Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Elizabeth A. Benham, Max P. McDaniel
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Publication number: 20100184580Abstract: Glass-ceramic sealant is disclosed for planar solid oxide fuel cells. The glass-ceramic sealant includes 0 to 40 mol % of silicon oxide, 0 to 15 mol % boron oxide, 0 to 10 mol % of aluminum oxide, 0 to 40 mol % of barium oxide, 0 to 15 mol % of calcium oxide, 0 to 15 mol % of lanthanum oxide and 0 to 5 mol % of zirconium dioxide. At 0° C. to 600° C., the thermal expansion coefficient of the sealant is 8 to 10 ppm/° C.Type: ApplicationFiled: January 14, 2008Publication date: July 22, 2010Applicant: ATOMIC ENERGY COUNCIL - INSTITUTE OF NUCLEAR ENERGY RESEARCHInventors: Chien-Kuo Liu, Tung-Yuan Yung, Kin-Fu Lin, Ruey-Yi Lee, Tzang-Sheng Lee
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Patent number: 7611686Abstract: The present invention relates to a purification method for removing impurities containing oxygen from materials, especially boron, by hydrogen-based plasma treatment. The present procedure allows for efficient removal of oxygen while avoiding a thermal treatment that would substantially change the structure of the treated material, or a treatment leaving a reducing agent within the treated material.Type: GrantFiled: May 17, 2006Date of Patent: November 3, 2009Assignee: Max-Planck-Gesellschaft zur Forderung der Wissenschaften E.V.Inventors: Anastasia Alekseeva, Kirill Kovnir, Pavel Chizhov, Michael Baitinger, Yuri Grin
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Patent number: 6991773Abstract: A hydrogen storage medium is provided, where the medium is comprised of boron oxide and closely related compounds such as orthoboric acid, metaboric acid, hydrated boric acid, and disodium borohydrate. The medium is substantially an amorphous glassy network, albeit with local regions of order, pores, and networks that provide surface area. Hydrogen is adsorbed by the medium with a heat of adsorption of about 9 kJ/mol to about 13 kJ/mol, a value which is higher than that of the heat of adsorption of hydrogen on carbon. The value for the heat of adsorption of hydrogen on the inventive storage medium is provided by computation, and corroborated by experimental observation. The higher heat of adsorption of the medium provides for operation at temperatures higher temperatures higher than those provided by carbon.Type: GrantFiled: October 8, 2002Date of Patent: January 31, 2006Assignee: Nanomix, Inc.Inventors: Seung-Hoon Jhi, Young-Kyun Kwon, Keith Bradley, Jean-Christophe P. Gabriel
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Patent number: 6872402Abstract: Pyrogenically prepared silica doped with silver or silver oxide is prepared by feeding an aerosol into a flame such as is used for the preparation of pyrogenic silica, mixing the aerosol homogeneously with gas mixture before the reaction, then allowing the aerosol/gas mixture to react in a flame. The resulting pyrogenic silicas doped with silver or silver oxide are separated from the gas stream. The pyrogenic silica doped with silver or silver oxide by means of an aerosol can be used as a bactericidal filler.Type: GrantFiled: June 19, 2002Date of Patent: March 29, 2005Assignee: Degussa AGInventors: Helmut Mangold, Rainer Golchert
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Patent number: 6800265Abstract: A method for treating a gas, which comprises contacting a gas containing a boric acid component in an amount of at least 15 mg/m3 as converted into B2O3 concentration in a standard state, with a solid alkali metal carbonate material comprising at least one member selected from the group consisting of alkali metal carbonates and alkali metal hydrogencarbonates, to remove the boric acid component from the gas.Type: GrantFiled: September 10, 2002Date of Patent: October 5, 2004Assignee: Asahi Glass Company, LimitedInventors: Yoichi Mori, Hachiro Hirano, Kazutaka Ohtsuka, Itsuo Mochizuki
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Patent number: 6780913Abstract: A zinc borate having a particular crystallite size and containing very little sodium components and a method of preparing the same. The zinc borate has a particular chemical composition, has a crystallite size of not smaller than 40 nm as found from diffraction peaks of indexes of planes of (020), (101) and (200) in the X-ray diffraction image (Cu-k&agr;) and contains sodium components in amounts of not larger than 100 ppm as measured by the atomic absorptiometric method.Type: GrantFiled: September 5, 2001Date of Patent: August 24, 2004Assignee: Mizusawa Industrial Chemicals, Ltd.Inventors: Hiroshi Sawada, Hiroshi Igarashi, Akira Tatebe, Kazunori Sakao
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Patent number: 6613300Abstract: Doped, pyrogenically prepared oxides of metals and/or non-metals which are doped with one or more doping components in an amount of 0.00001 to 20 wt. %. The doping component may be a metal and/or non-metal or an oxide and/or a salt of a metal and/or a non-metal. The BET surface area of the doped oxide may be between 5 and 600 m2/g. The doped pyrogenically prepared oxides of metals and/or non-metals are prepared by adding an aerosol which contains an aqueous solution of a metal and/or non-metal to the gas mixture during the flame hydrolysis of vaporizable compounds of metals and/or non-metals.Type: GrantFiled: August 9, 2001Date of Patent: September 2, 2003Assignee: Degussa AGInventors: Helmut Mangold, Rainer Golchert, Stipan Katusic, Karlheinz Janzon
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Patent number: 6426083Abstract: The invention relates to aqueous boron-containing compositions and their preparation. In particular the invention provides self-structured aqueous sodium pentaborate gels. The gels according to the invention may be prepared by reacting boric acid or boric oxide and sodium tetraborate or metaborate in suspension in water and under mixing such that a self-structured sodium pentaborate gel is formed. The gels according to the invention are physically stable and are easily handled.Type: GrantFiled: April 20, 2000Date of Patent: July 30, 2002Assignee: U.S. Borax Inc.Inventor: Igan Hayati
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Patent number: 6328944Abstract: Doped, pyrogenically prepared oxides of metals and/or non-metals which are doped with one or more doping components in an amount of 0.00001 to 20 wt. %. The doping component may be a metal and/or non-metal or an oxide and/or a salt of a metal and/or a non-metal. The BET surface area of the doped oxide may be between 5 and 600 m2/g. The doped pyrogenically prepared oxides of metals and/or non-metals are prepared by adding an aerosol which contains an aqueous solution of a metal and/or non-metal to the gas mixture during the flame hydrolysis of vaporizable compounds of metals and/or non-metals.Type: GrantFiled: December 2, 1997Date of Patent: December 11, 2001Assignee: Degussa AGInventors: Helmut Mangold, Rainer Golchert, Stipan Katusic, Karlheinz Janzon
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Patent number: 6242373Abstract: A boron oxide-silicon dioxide mixed oxide which has a BET surface of less than 100 m2g, and optionally containing oxides of aluminium, titanium or zirconium, is prepared pyrogenically by flame hydrolysis. The mixed oxide is used in glass making.Type: GrantFiled: April 3, 2000Date of Patent: June 5, 2001Assignee: Degussa-huls AGInventors: Helmut Mangold, Manfred Ettlinger, Dieter Kerner, Peter Kleinschmit
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Patent number: 6143264Abstract: Process for the preparation of undecahydrododecaborate anions [B.sub.12 H.sub.(12-n) (XCN).sub.n ].sup.2- or [B.sub.12 H.sub.11 XH].sup.2- or a nonahydrodecaborate anions [B.sub.10 H.sub.(12-n) (XCN).sub.n ].sup.2- or [B.sub.10 H.sub.9 XH].sup.2- or anions of formula [B.sub.12 H.sub.11 SC(NR.sup.1 R.sup.2).sub.2 ].sup.-1 wherein X=O, S, or Se.Type: GrantFiled: August 26, 1998Date of Patent: November 7, 2000Assignee: The University of StrathclydeInventors: Victor Alexandrovich Brattsev, John Howell Morris
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Patent number: 5876686Abstract: This invention relates to a process for the preparation of an inorganic oxide gel comprising contacting at least one fluorinated inorganic oxide precursor with a fluorinated gelling agent in the presence of at least one fluorinated solvent to form a solution; allowing sufficient time for gelation to occur; and isolating the inorganic oxide gel. Gels made by this process are useful as coatings and as components in inorganic/organic hybrid materials.Type: GrantFiled: June 14, 1996Date of Patent: March 2, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Michael Joseph Michalczyk, Kenneth George Sharp
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Patent number: 5858079Abstract: The present invention provides a strontium borate pigment composition comprising particles of a strontium borate represented by the general formula (1):.alpha.SrO..beta.B.sub.2 O.sub.3..gamma.H.sub.2 O (1)(wherein O<.alpha..ltoreq.3, O<.beta..ltoreq.4, O.ltoreq..gamma..ltoreq.5), the particles being coated with at least one compound selected from the group consisting of compounds represented by the formulae (2) to (6):.delta.SrO..epsilon.SiO.sub.2..zeta.H.sub.2 O (2)(wherein O<.delta..ltoreq.3, O<.epsilon..ltoreq.2, O.ltoreq..zeta..ltoreq.4 ).eta.SrO..theta.Al.sub.2 O.sub.3..iota.H.sub.2 O (3)(wherein O<.eta..ltoreq.5, O<.theta..ltoreq.16, O.ltoreq..iota..ltoreq.6)SrSO.sub.4 (4)SrCO.sub.3 (5)andSrHPO.sub.4 (6),the pigment composition having an average particle diameter of 0.1 .mu.m to 5 .mu.Type: GrantFiled: March 25, 1997Date of Patent: January 12, 1999Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Koichi Ohtsu, Taizo Kaihatsu
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Patent number: 5651949Abstract: Amorphous boric oxide-containing product having about 80 to 90% B.sub.2 O.sub.3 is produced by heating boric acid to an elevated temperature of about 180.degree. to 220.degree. C. to dehydrate the boric acid and form a molten glass which is cooled to a solid glassy product. The solid glass can be comminuted to produce a particulate product. Preferably the boric acid is heated at about 195.degree. to 205.degree. C. The process is readily adapted to a continuous process in which the boric acid is continuously fed through a heated reactor-mixer such as a Kneadermaster mixer or Discotherm mixer. The molten glassy product is cooled to form a solid glassy product which can be comminuted to a desirable particle size range.Type: GrantFiled: March 6, 1996Date of Patent: July 29, 1997Assignee: U.S. Borax Inc.Inventors: Richard P. Fisher, John D. Kwamya, Tracy E. Gray
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Patent number: 5461021Abstract: A novel composition comprises aluminum borate and zirconium borate. Preferably, the composition is prepared by coprecipitation. The composition is useful as a sorbent or as a catalyst material.Type: GrantFiled: October 17, 1994Date of Patent: October 24, 1995Assignee: Phillips Petroleum CompanyInventor: Lyle R. Kallenbach
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Patent number: 5456735Abstract: A method of removing material from a surface comprising abrading a surface comprising the step of abrading a surface with an abrasive tool or an abrasive powder comprising a boron suboxide (BxO) composition, wherein during the abrading step the boron suboxide (BxO) composition is maintained at low temperatures. The abrasive which is from the boron suboxide (BxO) family of compounds exhibits an unexpectedly high quality of abrading comparable with the highest quality particulate natural and synthetic diamond, which has a hardness about double that of the boron suboxide (BxO) of the present invention.Further, the invention includes a lapping and polishing powder and lapping slurry wherein the powder is made from a dense, finely crystalline boron suboxide material with a Knoop hardness KHN.sub.100 of at least about 2800 kg/mm.sup.2 and preferably at least 3800 kg/mm.sup.2.Type: GrantFiled: March 24, 1994Date of Patent: October 10, 1995Assignee: Norton CompanyInventors: Cristan Ellison-Hayashi, George T. Emond, Shih Y. Kuo
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Patent number: 5424052Abstract: Amorphous boric oxide-containing product having about 85 to 92% B.sub.2 O.sub.3 is produced by heating boric acid at an elevated temperature of up to about 275.degree. C. to dehydrate the boric acid and form a molten glass which is cooled to a solid glassy product. This solid glass can be comminuted to produce a particulate product. Preferably the boric acid is heated at 220.degree. to 275.degree. C., with about 250.degree. to 270.degree. C. being most preferred. The process is readily adapted to a continuous process in which the boric acid is placed on a moving continuous steel belt and conveyed through a heating zone. The molten glassy product is cooled to form a solid glassy product which is removed from the belt and comminuted to a desirable particle size range.Type: GrantFiled: November 24, 1993Date of Patent: June 13, 1995Assignee: U.S. Borax Inc.Inventors: Paul F. Jacobs, Jacob J. Mu, Richard P. Fisher
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Patent number: 5343827Abstract: A method of growing optical quality beta barium borate; crystals from a pure NaCl fluxed melt. The method comprises maintaining particular thermal field conditions throughout the melt and slowly cooling the melt to cause beta barium borate to crystallize from the melt. The rate of cooling may be at a rate of not greater than 3.degree. C. per day. The method may utilize a seed crystal, suspended into the melt, so that the beta barium borate may crystallize on the seed crystal.Type: GrantFiled: February 19, 1992Date of Patent: September 6, 1994Assignee: Crystal Technology, Inc.Inventors: Peter F. Bordui, George D. Calvert
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Patent number: 5330937Abstract: A superhard form of boron suboxide comprises at least about 95% by weight B.sub.6 O and has a KNH.sub.100 value of at least about 3800 kg/mm.sup.2. In a preferred embodiment, the boron suboxide has an average grain size of about 0.1-40 microns. A method for forming the superhard boron suboxide comprises mixing boron oxide (B.sub.2 O.sub.3) and boron powder and subjecting the mixture to a temperature of 1500.degree. C. to about 2,200.degree. C. and a pressure sufficient to produce the superhard boron suboxide. The superhard boron suboxide may be made by this method with or without a sintering aid being present in the mixture of boron and boron oxide.Type: GrantFiled: July 28, 1992Date of Patent: July 19, 1994Assignee: Norton CompanyInventors: Cristan Ellison-Hayashi, Morteza Zandi, Dinesh K. Shetty, Peter Kuo, Russell Yeckley, Frank Csillag
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Patent number: 5235117Abstract: For preparing at least one boric oxide in an anhydrous or hydrated form and of general formula B.sub.2 O.sub.3, xH.sub.2 O, in which x is a number from 0 to 3, a methyl borate hydrolyzate comprising boric oxide and methanol is introduced into a distillation column is introduced the product from, at least one compound (preferably a hydrocarbon such as, e.g., 2,3-dimethyl butane or 2-methyl pentane) forming a heteroazeotrope with methanol, said heteroazaeotrope having a boiling point below that of the azeotrope formed by methyl borate with methanol and at least one compound having a boiling point higher than that of methyl borate, said compound not forming an azeotrope with a boiling point below that of said heteroazeotrope and then at the head of the column said heteroazeotrope is recovered and at the bottom of the column a suspension containing at least one boric oxide.Type: GrantFiled: September 25, 1991Date of Patent: August 10, 1993Assignee: Institut Francais du PetroleInventors: Jacques Alagy, Christian Busson, Lionel Asselineau
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Patent number: 5183785Abstract: The present invention provides an aluminum borate ceramic having a high porosity and a tightly controlled pore size distribution, while maintaining good mechanical strength. The ceramic body can be formed by decomposing boric acid-stabilized aluminum acetate to form an aluminum borate powder, and sintering the powder to form a ceramic body.Type: GrantFiled: June 29, 1990Date of Patent: February 2, 1993Assignee: Coors Porcelain CompanyInventor: Michael J. Readey
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Patent number: 5135892Abstract: A superhard form of boron suboxide (B.sub.x O) comprises at least about 95% by weight of polycrystalline B.sub.6 O and has a KHN.sub.100 value of at least about 3800 kg/mm.sup.2. A method for forming the superhard boron suboxide comprises mixing stoichiometric amounts of boron oxide (B.sub.2 O.sub.3) powder and boron powder and subjecting the mixture to a temperature of about 1800.degree. C. to about 2200.degree. C. and a pressure of about 2,000 to about 6,000 psi while encapsulated by boron nitride. The boron powder comprises about 90 to 95% by weight of elemental boron (B), and at least about 1% by weight of a sintering aid, such as Mg.Type: GrantFiled: July 12, 1991Date of Patent: August 4, 1992Assignee: Norton CompanyInventors: Cristan Ellison-Hayashi, Morteza Zandi, Frank J. Csillag, Shih-Yee Kuo
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Patent number: 5055280Abstract: A process for producing fibers of a transition metal boride, which comprises reacting a mixture of a vapor of an evaporable boron compound an a vapor of an evaporable transition metal compound in the presence of a catalyst composed of at least one metal selected from the group consisting of Pt, Pd, Cu, Au and Ni.Type: GrantFiled: September 16, 1988Date of Patent: October 8, 1991Assignee: National Research Institute For MetalsInventors: Isao Nakatani, Kiyoshi Ozawa
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Patent number: 5054683Abstract: A method is set forth of bonding together two bodies (1, 2), according to which a first body (1) is provided with a flat surface (5) and the second body (2) is provided with a silicon oxide layer (4) with a flat surface (6), after which a connecting layer (7) containing boron is provided on at least one of the two flat surfaces. Subsequently, the two bodies (1, 2) are pressed together at elevated temperature, so that a borosilicate glass layer is formed. According to the invention, a layer of practically pure boron is used by way of connecting layer (7). Among the advantages of this is that the composition of the borosilicate glass layer is exclusively determined by the previously chosen layer thicknesses.Type: GrantFiled: August 29, 1990Date of Patent: October 8, 1991Assignee: U.S. Philips CorporationInventors: Jan Haisma, Gijsbertus Spierings, Joseph G. Van Lierop, Hendrik F. Van Den Berg
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Patent number: 5049371Abstract: A novel process is described for the preparation of monodisperse ceramic ders wherein particulate oxides or hydroxides are obtained by reaction of hydrolysable compounds with water. The reaction is carried out in the presence of a complexing agent and, optionally, a stabilizer.Type: GrantFiled: October 28, 1988Date of Patent: September 17, 1991Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung e.V.Inventors: Gunter Rinn, Rudiger Nass
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Patent number: 5034206Abstract: Disclosed is a method of making aluminum borate fibers comprising the steps of preparing an aluminum borate gel by reacting aluminum salt in a solution with ammonium borate and heating the gel to form the aluminum borate fibers.Type: GrantFiled: July 1, 1988Date of Patent: July 23, 1991Assignee: Aluminum Company of AmericaInventor: Chanakya Misra
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Patent number: 4908196Abstract: High-purity boric oxide which does not adhere to the reactor walls is obtained by:(a) gradually heat in boric acid, with the absence or substantial absence of fusion phenomena, at increasing temperature to a value not exceeding about 150.degree. C.; operating at below atmospheric pressure, to eliminate water until the boric acid has been completely or substantially completely converted into metaboric acid;(b) gradually heating the metaboric acid obtained in stage (a), with the absence or substantial absence of fusion phenomena, at increasing temperature to a value not exceeding about 400.degree. C., operating at below atmospheric pressure, to eliminate water until the metaboric acid has been completely or substantially completely converted into boric oxide.Type: GrantFiled: June 29, 1987Date of Patent: March 13, 1990Assignee: Societa Chimica Larderello S.p.A.Inventors: Antonio Vasconi, Paolo Mazzinghi
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Patent number: 4808397Abstract: A process for preparing spheroid particles of oxide compounds, having an average diameter of smaller than 3 microns. An emulsion is prepared of a hydrolyzable liquid oxide compound in a perfluoropolyether, the emulsion is reacted with water, water vapor or with a mixture, in any ratio, of water with a liquid miscible or immiscible with water so as to form an oxide hydrate which is recovered dried and calcined. Oxide compounds include oxides of Ti, Al, Zr, Si or B.Type: GrantFiled: July 27, 1987Date of Patent: February 28, 1989Assignee: Montedison S.p.A.Inventors: Enrico Albizzati, Emiliano M. Ceresa, Luciano Zaninetta
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Patent number: 4795677Abstract: Carbon-carbon composites consisting of graphite fibers reinforcing a carbon matrix are protected from oxidation by a B.sub.2 O.sub.3 glass coating which includes a refractory oxide to stabilize the viscosity of the glass. Precursors of B.sub.2 O.sub.3 and the refractory oxide are dispersed into a resin, the resin is used to impregnate fibrous graphite or fibrous graphitizable material, the sheets are laid up as plies and the laid-up plies are carbonized and graphitized using heat structure. The composite structure is then coated with an additional mix of resin and precursors and the coated structure is heated to carbonize the resin and leave a seal coat on the structure. Then an outer shell of a refractory material is deposited on the structure.Type: GrantFiled: August 3, 1987Date of Patent: January 3, 1989Assignee: GA Technologies Inc.Inventor: Paul B. Gray
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Patent number: 4789422Abstract: Disclosed is a method of making aluminum borate fibers comprising the steps of preparing an aluminum borate gel by reacting aluminum salt in a solution with ammonium borate and heating the gel to form the aluminum borate fibers.Type: GrantFiled: September 26, 1986Date of Patent: December 6, 1988Assignee: Aluminum Company of AmericaInventor: Chanakya Misra
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Patent number: 4756745Abstract: An improved process to benefit colemanite and/or howlite minerals comprising the stages of: treating mineral with sulfuric acid in order to dissolve boron compounds; separating the solution formed from the solids in suspension; reacting said solution with hydrogen sulfide in order to precipitate the arsenic and iron impurities contained in the solution, and separating the impurities precipitated from the remaining solution as a beneficiated colemanite with boron. Said solution of the beneficiated colemanite with boron can be dried by spray fluidizing in order to obtain solid beneficiated colemanite with boron or said solution can be reacted with calcium hydroxide to precipitate a beneficiated colemanite with calcium borate which is separated from the remaining solution. This can be recycled for treatment with sulfuric acid to concentrate the mineral.Type: GrantFiled: January 29, 1987Date of Patent: July 12, 1988Assignee: Materias Primas Magdalena, S.A.DE C. V.Inventor: Jose Polendo-Loredo
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Patent number: 4612174Abstract: Waste gases and other noxious substances which are formed in connection with chemical processes and the manufacture of devices such as semiconductors and covalent hydrides and element organic compounds, etc. are treated so as to remove the noxious components.Type: GrantFiled: November 13, 1984Date of Patent: September 16, 1986Assignee: Heinrich-Hertz-Institute fur Nachrichtentechnik Berlin GmbHInventors: Werner Fabian, Helmut Roehle, Peter Wolfram
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Patent number: 4563341Abstract: A host liquid, such as a liquid metal, which is "seeded" with small bubbles of an inert gas, is maintained in a sealed chamber at an ambient temperature of about 100.degree. K. above the melting point of the host liquid, and at a static pressure ranging from 1 to 100 bars. A substance (for example carbon) which is capable of being allotropically transformed from a first form thereof (for example graphite) to a second form (for example diamond), is placed in the host liquid, which is then subjected to a time-varying acoustical pressure applied, for example, by a plurality of solid acoustical horns, which cause at least certain of the bubbles of inert gas to expand and then suddenly to collapse in a cavitation zone located substantially centrally of the chamber.Type: GrantFiled: June 7, 1982Date of Patent: January 7, 1986Inventor: Hugh G. Flynn