Titanium Or Zirconium Containing Patents (Class 501/38)
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Patent number: 6458436Abstract: Mineral fiber products, in particular rigid bonded mineral fiber products, are provided which comprise composite mineral fibers having a coating-core configuration wherein the core provides at least 90% by weight of the fibers and is formed of mineral melt and the coating is coated onto the core. The mineral melt is chosen so that the fibers without coating have adequate biological solubility and the coating comprises a phosphate or hydrogen phosphate of alkali metal, quaternary ammonium or ammonium in an amount of at least 0.3% or by weight of the core. The coated fibers retain their biological solubility while improving resistance to ageing in use.Type: GrantFiled: August 11, 1998Date of Patent: October 1, 2002Assignee: Rockwool International A/SInventors: Erling Hansen, Povl Nissen, Soren Lund Jensen
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Publication number: 20020086790Abstract: Man-made vitreous fibers have a solubility of pH 4.5 of at least 20 nm per day and a melt viscosity of 10 to 70 poise at 1400° C. Novel fibers contain at least 18% Al2O3. Particular products include external wall insulation or cladding and pipe sections. A composition for making suitable fibers may be selected by determining solubility at pH 4.5 or in macrophage.Type: ApplicationFiled: December 24, 2001Publication date: July 4, 2002Applicant: Rockwool International A/SInventors: Soren Lund Jensen, Vermund Rust Christensen, Marianne Guldberg
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Patent number: 6346494Abstract: Man-made vitreous fibers have a solubility of pH 4.5 of at least 20 nm per day and a melt viscosity of 10 to 70 poise at 1400° C. Novel fibers contain at least 18% Al2O3. Particular products include external wall insulation or cladding and pipe sections. A composition for making suitable fibres may be selected by determining solubility at pH 4.5 or in macrophage.Type: GrantFiled: July 9, 1999Date of Patent: February 12, 2002Assignee: Rockwool International A/SInventors: Soren Lund Jensen, Vermund Rust Christensen, Marianne Guldberg
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Patent number: 6319866Abstract: Man-made vitreous fibers have a solubility of pH 4.5 of at least 20 nm per day and a melt viscosity of 10 to 70 poise at 1400° C. Novel fibers contain at least 18% Al2O3. Particular products include external wall insulation or cladding and pipe sections. A composition for making suitable fibres may be selected by determining solubility at pH 4.5 or in macrophage.Type: GrantFiled: July 9, 1999Date of Patent: November 20, 2001Assignee: Rockwool International A/SInventors: Soren Lund Jensen, Vermund Rust Christensen, Marianne Guldberg
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Patent number: 6313051Abstract: The present invention provides a method for the manufacture of ceramic composite fibers, and the present invention relates to a method for the manufacture of a composite fiber in which a second phase is dispersed within a matrix fiber, wherein the matrix consists of a substance selected from alumina, zirconia, mullite, YAG, silica, magnesia, nitrides, carbides, metals, alloys, and polymers; the second phase consists of a substance selected from zirconia, mullite, YAG, and other oxides, or from metals; and the composite fiber is produced by synthesizing a fiber from a precursor solution containing the substance of the matrix, and the starting solution which serves as the second phase, dispersed through the matrix solution, and then heating the fiber.Type: GrantFiled: February 10, 2000Date of Patent: November 6, 2001Assignees: Agencey of Industrial Science and Technology, Fine Ceramics Research AssociationInventors: Atsuya Towata, Mutsuo Sando, Koichi Niihara
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Patent number: 6309990Abstract: A low-dielectric-constant glass fiber having a glass composition comprising, by % by weight, 45 to 60% of SiO2, 8 to 20% of Al2O3, 15 to 30% of B2O3, 0 to 5% of MgO, 5%, exclusive of 5%, to 12% of CaO, 0 to 1.0% of Li2O+Na2O+K2O, 0.5 to 5% of TiO2 and 0 to 2% of F2 is suitable for use for reinforcing a high-density printed wiring board required to have a low dielectric tangent and its peripheral members.Type: GrantFiled: April 14, 1999Date of Patent: October 30, 2001Assignees: Nitto Boseki Co., Ltd., Nitto Glass Fiber Mfg. Co., LtdInventors: Shinichi Tamura, Masahiro Mori
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Patent number: 6277777Abstract: Novel boron-free glass compositions are described which are particularly suited for making fine diameter glass fibers for HEPA electronic clean-room filtration media using flame-attenuation or rotary glass processing.Type: GrantFiled: August 3, 1999Date of Patent: August 21, 2001Assignee: Johns Manville International, Inc.Inventors: Xiaojie Xu, Foster Laverne Harding, Jon Frederick Bauer
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Patent number: 6180546Abstract: Disclosed is use of a vitreous inorganic fiber in the knowledge that it has a composition meeting the criterion that the calculated sum of the free energies of hydration of the compounds that would or could be present at equilibrium (on the basis of knowledge, informed belief or reasonable assumption) is more negative than −10 kcal/100 grams of composition. Such compositions are saline soluble.Type: GrantFiled: March 4, 1999Date of Patent: January 30, 2001Assignee: The Morgan Crucible Company plcInventors: Gary Anthony Jubb, Jean-Louis Martin
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Patent number: 6110441Abstract: A method of producing a homogeneous metal oxide fiber having high denseness and free of voids that may adversely affect the electro-optic characteristic of the fiber, and a metal oxide fiber produced according to the method. The method comprises:a first step of forming a gel-form fiber from a sol obtained by concentrating a solution composed of a metallic compound, water and a solvent to the extent that the solution exhibits a spinnable behavior;a second step of decomposing and eliminating organic components out of the gel-form fiber obtained at the first step; anda third step of solidifying the gel-form fiber obtained at the second step;the second step and/or the third step being carried out while heating is made in a water vapor atmosphere.Type: GrantFiled: May 12, 1998Date of Patent: August 29, 2000Assignee: Minolta Co., Ltd.Inventor: Kenji Kitaoka
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Patent number: 6077798Abstract: A mineral fiber is disclosed having a composition including the following components in about the indicated weight percents:______________________________________ SiO.sub.2 48-64 Al.sub.2 O.sub.3 0-6 MgO 21-31 CaO 11-20 Iron Oxide 4.2-8 (as FeO) K.sub.2 O 0-5 Na.sub.2 O 0-5 TiO.sub.2 0-3 ______________________________________wherein the total weight of Na.sub.2 O and K.sub.2 O does not exceed 5% and the total weight of all components, including trace elements, if any, is 100%.Type: GrantFiled: August 2, 1996Date of Patent: June 20, 2000Assignee: Owens Corning Fiberglas Technology, Inc.Inventor: Charles F. Rapp
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Patent number: 6043170Abstract: Mineral fiber composition which is decomposable in the physiological medium, characterized by the following constituents in weight percent: SiO.sub.2 30 to less than 51; Al.sub.2 O.sub.3 higher than 11.5, in particular higher than 13,up to 25; CaO 2 to less than 23; MgO 0 to 15; Na.sub.2 O+K.sub.2 O higher than 10, up to 19; TiO.sub.2 +Fe.sub.2 O.sub.3 6 to 18; various 0 to 3.Type: GrantFiled: October 6, 1997Date of Patent: March 28, 2000Assignee: Isover Saint-GobainInventors: Bernd Steinkopf, Wolfgang Holstein, Axel Katzschmann, Peter Lohe
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Patent number: 6030910Abstract: A refractory glass fiber having a use temperature of greater than 1000.degree. C., up to at least 1260.degree. C., having an after service mechanical integrity comparable to conventional refractory ceramic fiber and which is non-durable in physiological fluids, consisting essentially of the product of silica, magnesia and optionally zirconia, is produced from a melt, optionally containing a viscosity modifier.Type: GrantFiled: August 13, 1998Date of Patent: February 29, 2000Assignee: Unifrax CorporationInventors: Bruce Zoitos, Richard E. A. Atkinson, James R. Olson
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Patent number: 6025288Abstract: A refractory glass fiber having a use temperature of greater than 1000.degree. C., up to at least 1260.degree. C., having an after service mechanical integrity comparable to conventional refractory ceramic fiber and which is non-durable in physiological fluids, consisting essentially of the product of silica, magnesia and optionally zirconia, is produced from a melt, optionally containing a viscosity modifier.Type: GrantFiled: January 13, 1999Date of Patent: February 15, 2000Assignee: Unifrax CorporationInventors: Bruce Zoitos, Richard E. A. Atkinson, James R. Olson
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Patent number: 6004671Abstract: A reinforcement for composite materials is disclosed, which comprises a number of filaments of inorganic long fiber and glass and/or glass ceramic present in the gaps among the filaments and having a wire or tape form. Also disclosed is a metallic or ceramic composite material composed of a plurality of the reinforcements and a metal or intermetallic compound or ceramic which is present in the gaps among the individual reinforcements.Type: GrantFiled: January 13, 1995Date of Patent: December 21, 1999Assignee: Research Institute of Advanced Material Gas-Generator, Ltd.Inventors: Takemi Yamamura, Mitsuhiko Sato, Makoto Tamura, Shinji Kajii, Yasuo Matsumori, Yoshikatu Harada
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Patent number: 5994247Abstract: Disclosed is use of a vitreous inorganic fiber in the knowledge that it has a composition meeting the criterion that the calculated sum of the free energies of hydration of the compounds that would or could be present at equilibrium (on the basis of knowledge, informed belief or reasonable assumption) is more negative than -10 kcal/100 grams of composition. Such compositions are saline soluble.Type: GrantFiled: July 23, 1997Date of Patent: November 30, 1999Assignee: The Morgan Crucible Company plcInventors: Gary Anthony Jubb, Jean-Louis Martin
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Patent number: 5981414Abstract: Described is an inorganic fiber comprising silica dioxide, calcium oxide, and alkali oxide having a free energy of hydration greater than (more positive than) -5.00 kcal/mol, an enthalpy of formation less than (more than negative than) -210.0 kcal/mol, a dissolution rate in simulated extra cellular fluid greater than 750 (calculated as nanograms of fiber/per square centimeter of fiber surface area/per hour) having an average fiber diameter not greater than 4.5 micrometers. Also described is a method of manufacturing the fibers.Type: GrantFiled: May 13, 1994Date of Patent: November 9, 1999Assignee: Johns Manville International, Inc.Inventors: Jon Frederick Bauer, Kevin Dean Schaal
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Patent number: 5970751Abstract: A method of producing, by flame hydrolysis, a fused silica glass containing titania which comprises delivering a mixture of a silica precursor and a titania precursor in vapor form to a flame, passing the vapor mixture through the flame to form SiO.sub.2 --TiO.sub.2 particles, and depositing the particles within a furnace where they melt to form a solid glass body.Type: GrantFiled: September 22, 1998Date of Patent: October 26, 1999Assignee: Corning IncorporatedInventors: John E. Maxon, Robert S. Pavlik, Jr., Daniel R. Sempolinski, Michael H. Wasilewski
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Patent number: 5962354Abstract: A composition which can be fiberized to form high quality insulation wool, and which has been formulated from naturally-occuring rock minerals such as basalts, granites, limestone, dolomite and sandstone, optionally including by-products of industrial processes such as molybdenum or steel slag and grate ash, and/or high alumina materials such as China Clay and/or boron containing minerals such as Ulexite, said composition comprising the following components, given in wt %, based on the total weight of the composition:______________________________________ SiO.sub.2 51-68 wt % Al.sub.2 O.sub.3 5-18 wt % ______________________________________with the total amount of SiO.sub.2 +Al.sub.2 O.sub.3 being from 62 to 75 wt %, ______________________________________ Na.sub.2 O 0-6 wt % K.sub.2 O 0-5 wt % ______________________________________with the total amount of Na.sub.2 O+K.sub.2 O being from 0 to 7.Type: GrantFiled: January 16, 1996Date of Patent: October 5, 1999Inventors: Kenneth M. Fyles, Peter Shorrock, Michael R. Davidson
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Patent number: 5958808Abstract: The low-dielectric-constant glass fiber of the present invention contains by weight, as a glass composition, 50 to 60% of SiO.sub.2, 10 to 20% of Al.sub.2 O.sub.3, 20 to 30% of B.sub.2 O.sub.3, 0 to 5% of CaO, 0 to 4% of MgO, 0 to 0.5% of Li.sub.2 O+Na.sub.2 O+K.sub.2 O and 0.5 to 5% of TiO.sub.2, and is preferably used as glass for printed wiring boards.Type: GrantFiled: March 18, 1998Date of Patent: September 28, 1999Assignees: Nitto Boseki Co., Ltd, Nitto Glass Fiber Mfg. Co., Ltd.Inventors: Masahiro Mori, Shinichi Tamura, Syoichi Saito, Kenzo Watabe, Tatsuo Inada, Masahiro Yamamoto
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Patent number: 5955389Abstract: A saline soluble fiber is disclosed that is highly refractory. A vacuum cast perform of the fiber has a shrinkage of 3.5% or less when exposed to 1260.degree. C. for 24 hours. The fiber may comprise CaO, SiO.sub.2, MgO, optionally ZrO.sub.2, optionally less than 0.75 mol % Al.sub.2 O.sub.3, any incidental impurities amounting to less than 2 mol % in total, and in which the SiO.sub.2 excess (defined as the amount of SiO.sub.2 calculated as remaining after the above named constituents are crystallized as silicates) exceeds 21.8 mol %, with the proviso that, if the amount of CaO is greater than the sum of the amount of MgO and twice the amount of ZrO.sub.2 the calculated ratio of diopside to wollastonite does not lie in the range 0.1 to 5.22. Such fibers are usable at elevated temperatures where refractoriness is of importance and their solubility in saline solution may make the fibers safer than non-soluble fibers.Type: GrantFiled: September 21, 1995Date of Patent: September 21, 1999Assignee: The Morgan Crucible Company, p/cInventor: Gary A. Jubb
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Patent number: 5952254Abstract: The invention relates to "two-component" inorganic fibers obtained by conjoint fiber formation from two different inorganic compositions, especially two glass compositions based on SiO.sub.2, alkali metal oxides and alkaline-earth metal oxides;the two inorganic compositions have thermal expansion coefficients .alpha. exhibiting a difference .DELTA..alpha. of at least 20.times.10.sup.7 K.sup.-1,they have a minimum viscosity temperature of fiber formation T.sub.log3 of between 830 and 1010.degree. C.,they exhibit a work range of at least 30.degree. C.,each includes, as weight percentages, in all less than 3% of the following compounds: TiO.sub.2, ZnO, BaO and Li.sub.2 O and preferably less than 1% of each of these,they exhibit, as weight percentages, differences in respective contents of boron oxides B.sub.2 O.sub.3 and of sodium oxide Na.sub.2 O such that:(i) .DELTA.B.sub.2 O.sub.3 >2%(ii) .DELTA.Na.sub.2 O>2%.Type: GrantFiled: June 12, 1998Date of Patent: September 14, 1999Assignee: Isover Saint-GobainInventors: Alain De Meringo, Fabrice Lafon, Jean-Luc Bernard, Veronique Renous Chan
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Patent number: 5935886Abstract: Man-made vitreous fibres has a solubility at pH 4.5 of at least 20 nm per day and a melt viscosity of 10-70 poise at 1,400.degree. C. and are formed from a composition which includes 18 to 30% by weight Al.sub.2 O.sub.3.Type: GrantFiled: May 8, 1997Date of Patent: August 10, 1999Assignee: Rockwool International A/SInventors: Soren Lund Jensen, Vermund Rust Christensen, Marianne Guldberg
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Patent number: 5932500Abstract: Man-made vitreous fibres have a solubility at pH 4.5 of at least 20 nm per day and a melt viscosity of 10-70 poise at 1,400.degree. C. A composition which will provide these properties is selected for their manufacture and contains at least 10% by weight Al.sub.2 O.sub.3. Novel fibres contain at least 6% by weight Na.sub.2 O +K.sub.2 O.Type: GrantFiled: May 8, 1997Date of Patent: August 3, 1999Assignee: Rockwool International A/SInventors: Soren Lund Jensen, Vermund Rust Christensen, Marianne Guldberg
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Patent number: 5928975Abstract: A saline soluble fiber is disclosed that is highly refractory. A vacuum cast preform of the fiber has a shrinkage of 3.5% or less when exposed to 1260.degree. C. for 24 hours. The fiber may comprise CaO, SiO.sub.2, MgO, optionally ZrO.sub.2, optionally less than 0.75 mol % Al.sub.2 O.sub.3, any incidental impurities amounting to less than 2 mol % in total, and in which the SiO.sub.2 excess (defined as the amount of SiO.sub.2 calculated as remaining after the above named constituents are crystallized as silicates) exceeds 21.8 mol %, with the proviso that, if the amount of CaO is greater than the sum of the amount of MgO and twice the amount of ZrO.sub.2 the calculated ratio of diopside to wollastonite does not lie in the range 0.1 to 5.22. Such fibers are usable at elevated temperatures where refractoriness is of importance and their solubility in saline solution may make the fibers safer than non-soluble fibers.Type: GrantFiled: September 24, 1997Date of Patent: July 27, 1999Assignee: The Morgan Crucible Company,plcInventor: Gary A. Jubb
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Patent number: 5874375Abstract: A refractory glass fiber having a use temperature of greater than 1000.degree. C., up to at least 1260.degree. C., having an after service mechanical integrity comparable to conventional refractory ceramic fiber and which is non-durable in physiological fluids, consisting essentially of the product of silica, magnesia and optionally zirconia, is produced from a melt, optionally containing a viscosity modifier.Type: GrantFiled: October 29, 1996Date of Patent: February 23, 1999Assignee: Unifrax CorporationInventors: Bruce Zoitos, Richard E. A. Atkinson, James R. Olson
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Patent number: 5821183Abstract: Refractory fibres are disclosed for which a vacuum cast preform of the fibre has a shrinkage of 3.5% or less when exposed to 1260.degree. C. for 24 hours. The fibres comprise CaO, SiO.sub.2, SrO, and optionally ZrO.sub.2 any incidental impurities amounting to less than 2 mol % in total. To achieve the shrinkage performance stated the SiO.sub.2 excess (defined as the amount of SiO.sub.2 calculated as remaining after the above named constituents are crystallised as silicates) exceeds 26 mol %. Preferred fibres comprise:--CaO less than 33.8 mol %, SiO.sub.2 more than 62.1 mol %, and more preferably comprise:--CaO 12.9 to 31.9 mol %, SrO 2.6 to 15.5 mol %, SiO.sub.2 63.2 to 71.3 mol %, ZrO.sub.2 0 to 5.4 mol %.Type: GrantFiled: January 7, 1997Date of Patent: October 13, 1998Assignee: The Morgan Crucible Company, plcInventor: Gary Anthony Jubb
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Patent number: 5811360Abstract: A saline soluble fibre is disclosed that is highly refractory. A vacuum cast preform of the fibre has a shrinkage of 3.5% or less when exposed to 1260.degree. C. for 24 hours. The fibre may comprise CaO, SiO.sub.2, MgO optionally ZrO.sub.2, optionally less than 0.75 mol % Al.sub.2 O.sub.3, any incidental impurities amounting to less than 2 mol % in total, and in which the SiO.sub.2, excess (defined as the amount of SiO.sub.2 calculated as remaining after the above named constituents are crystallised as silicates) exceeds 21.8 mol %, with the proviso that, if the amount of CaO is greater than the sum of the amount of MgO and twice the amount of ZrO.sub.2 the calculated ratio of diopside to wollastonite does not lie in the range 1.8 to 5.25. Such fibres are usable at elevated temperatures where refractoriness is of importance and their solubility in saline solution may make the fibres safer than non-soluble fibres.Type: GrantFiled: March 15, 1994Date of Patent: September 22, 1998Assignee: The Morgan Crucible Company plcInventor: Gary A. Jubb
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Patent number: 5789329Abstract: Boron-free glass fibers suitable for textile and reinforcements are described. The glass fibers have compositions consisting essentially of SiO.sub.2, CaO, Al.sub.2 O.sub.3, and MgO. In a preferred embodiment, the glass contains essentially no fluorine, sulfate, or titania These glass fiber compositions advantageously have broad or large values for delta T (i.e., the difference between the log 3 or forming temperature--the temperature at which the glass has a viscosity of approximately 1000 poise--and the liquidus temperature), e.g., a delta T of at least about 125.degree. F. (52.degree. C.), more preferably of at least about 150.degree. F. (66.degree. C.).Type: GrantFiled: February 18, 1997Date of Patent: August 4, 1998Assignee: Owens Corning Fiberglas Technology, Inc.Inventors: Walter L. Eastes, Douglas A. Hofmann, John W. Wingert
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Patent number: 5714421Abstract: Inorganic fibers which have a silicon extraction of greater than about 0.02 wt % Si/day in physiological saline solutions. The fiber contains SiO.sub.2, MgO, CaO, and at least one of Al.sub.2 O.sub.3, ZrO.sub.2, TiO.sub.2, B.sub.2 O.sub.3, iron oxides, or mixtures thereof. Also disclosed are inorganic fibers which have diameters of less than 3.5 microns and which pass the ASTM E-119 two hour fire test when processed into a fiber blanket having a bulk density in the range of about 1.5 to 3 pcf.Type: GrantFiled: July 25, 1994Date of Patent: February 3, 1998Assignee: Manville CorporationInventors: Leonard Elmo Olds, William Henry Kielmeyer
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Patent number: 5691255Abstract: The production and physiological dissolution rate of mineral wool formed of MMV fibers containing 35-66% SiO.sub.2, up to 10% A1.sub.2 O.sub.3, 10-45% CaO, 2-30% MgO, up to 10% FeO, 0-7% Na.sub.2 O+K.sub.2 O and 0-10% TiO.sub.2 is improved by including both P.sub.2 O.sub.5 and B.sub.2 O.sub.3 in the composition.Type: GrantFiled: April 8, 1996Date of Patent: November 25, 1997Assignee: Rockwool InternationalInventors: Soren Lund Jensen, Vermund Rust Christensen
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Patent number: 5631084Abstract: The invention relates to a refractory thermally-insulating component consisting essentially of refractory ceramic fibers which are mechanically combined with one another, the composition of which comprises at least 97.5% by weight of alumina, silica and zirconia in total, wherein:a) no organic or inorganic binder binds the fibers to one another;b) the fibers have the following chemical composition, as % by weight:Al.sub.2 O.sub.3 : 33-45%SiO.sub.2 : 41-53%ZrO.sub.2 : 5.5-17%MgO: 0.02-2%other oxides:<0.50% with Fe.sub.2 O.sub.3 +TiO.sub.2 .ltoreq.0.20% and Na.sub.2 O+CaO+K.sub.2 O.ltoreq.0.30%;c) the said fibers homogeneously have, throughout the entire body of the component, a degree of crystallinity of not less than 30% and not more than 64%, the crystals present being essentially formed of mullite crystals and of quadratic zirconia; andd) the said component has a linear shrinkage of no more than 3% after being held for 24 hours at 1450.degree. C.Type: GrantFiled: December 21, 1994Date of Patent: May 20, 1997Assignee: Societe Europeenne des Produits RefractairesInventors: Daniel Urffer, Joseph Recasens
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Patent number: 5614449Abstract: A product comprising man made vitreous fibers formed of a composition which comprises, by weight of oxides:______________________________________ SiO.sub.2 45-60% Al.sub.2 O.sub.3 0.5-4.0% TiO.sub.2 0.1-4% FeO 6-12% CaO 10-25% MgO 8-18% Na.sub.2 O 0-2.5% K.sub.2 O 0-2% Na.sub.2 O + K.sub.2 O 0-6% P.sub.2 O.sub.5 3-10% ______________________________________wherein the product has a sintering temperature of at least 950.degree. C. and wherein above 50% by weight of the iron is present as ferrous.Type: GrantFiled: September 28, 1995Date of Patent: March 25, 1997Assignee: Rockwool International A/SInventor: Soren L. Jensen
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Patent number: 5597769Abstract: A dielectric ceramic composition having an empirical formula represented by (Sr.sub.l-2x Bi.sub.x Ti.sub.l-y W.sub.y)O.sub.3 wherein x is in a range of 0.0005 to 0.003 and y is in a range of 0.0015 to 0.009 for boundary layer condensers and a method for preparing the same which are comprising the steps of: mixing Bi.sub.2 O.sub.3 -WO.sub.3 frit powder with main component having an empirical formula represented by Sr.sub.l-2x Ti.sub.l-y O.sub.3 wherein x is in a range of 0.0005 to 0.003 and y is in a range of 0.0015 to 0.009, in a wet manner, the Bi.sub.2 O.sub.3 frit serving as a reducing agent; drying the resulting mixture; sintering the dried mixture at a temperature of 1,400 to 1,470.degree. C under a reducing atmosphere; and applying secondary thermal treatment to the sintered body at 1,250.degree. C are disclosed.Type: GrantFiled: April 19, 1995Date of Patent: January 28, 1997Assignee: Korea Institute of Science and TechnologyInventors: Yoon H. Kim, In-Kyu Yoo, Jae-Dong Byun
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Patent number: 5585312Abstract: Composition and process for the preparation of high temperature stable continuous glass ceramic fibers with an upper temperature use limit of 2300.degree. F. are provided. The compositional formulation, in mole percent, is 62-85% SiO.sub.2, 9.5-20% Al.sub.2 O.sub.3, 5-15.5% MgO, 0.5-5% TiO.sub.x, and 0-5% ZrO.sub.2. The continuous fibers are prepared by an economical direct melt method, and demonstrate high tensile strength, high Young's modulus, and low linear thermal shrinkage characteristics.Type: GrantFiled: December 21, 1995Date of Patent: December 17, 1996Assignee: Unifrax CorporationInventors: John D. TenEyck, Thomas M. Clere, James Olson, Steven Waisala
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Patent number: 5569629Abstract: Composition and process for the preparation of high temperature stable continuous glass ceramic fibers with an upper temperature use limit of 2300.degree. F. are provided. The compositional formulation, in mole percent, is 62-85% SiO.sub.2, 9.5-20% Al.sub.2 O.sub.3, 5-15.5% MgO, 0.5-5% TiO.sub.x, and 0-5% ZrO.sub.2. The continuous fibers are prepared by an economical direct melt method, and demonstrate high tensile strength, high Young's modulus, and low linear thermal shrinkage characteristics.Type: GrantFiled: June 6, 1995Date of Patent: October 29, 1996Assignee: Unifrax CorporationInventors: John D. TenEyck, Thomas M. Clere, James Olson, Steven Waisala
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Patent number: 5508235Abstract: A Cu-doped/Fe-doped low expansion glass ceramic composition comprising:______________________________________ Wt. % ______________________________________ SiO.sub.2 50-65 Al.sub.2 O.sub.3 18-27 P.sub.2 O.sub.5 0-10 Li.sub.2 O 2-6 Na.sub.2 O 0-2 K.sub.2 O 0-2 B.sub.2 O.sub.3 0-1 MgO 0-4 ZnO 0-5 CaO 0-4 BaO 0-5 TiO.sub.2 1-3 ZrO.sub.2 1-3 As.sub.2 O.sub.3 0-1.5 Sb.sub.2 O.sub.3 0-1.5 CuO 0-3 Fe.sub.2 O.sub.3 0-1 ______________________________________wherein the total amount of SiO.sub.2, Al.sub.2 O.sub.3 and P.sub.2 O.sub.5 is 80-89 wt. %, and said glass ceramic contains as a dopant 0.1-3 wt. % CuO, 0.1-1 wt. % Fe.sub.2 O.sub.3 or a combined CuO+Fe.sub.2 O.sub.3 amount of 0.1-4 wt. %. The glass ceramic composition is suitable for use as a cladding material for solid laser energy storage mediums as well as for use in beam attenuators for measuring laser energy level and beam blocks or beam dumps used for absorbing excess or unused laser energy.Type: GrantFiled: July 6, 1994Date of Patent: April 16, 1996Assignee: Schott Glass Technologies, Inc.Inventor: Alexander J. Marker
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Patent number: 5407872Abstract: A glass fiber forming composition exhibits a remarkably high dielectric constant .epsilon..sub..GAMMA. as well as superior chemical resistance, yet it is readily spun into glass fibers. The composition is characterized to show a devitrification temperature which is lower than a spinning temperature at which the glass composition exhibits a viscosity of 10.sup.2.5 poise, so as to be readily spun into corresponding glass fibers. The composition consists essentially of 40 to 65 mol % of SiO.sub.2 ; 20 to 45 mol % of at least one component selected from the group consisting of MgO, CaO, SrO and BaO; 5 to 25 mol % of at least one component selected from the group consisting of TiO.sub.2 and ZrO.sub.2 ; and 0.5 to 15 mol % of NbO.sub.5/2 as calculated from an incorporated amount of Nb.sub.2 O.sub.5. Alternately, the composition consist essentially of 40 to 65 mol % of SiO.sub.Type: GrantFiled: November 8, 1993Date of Patent: April 18, 1995Assignees: Matsushita Electric Works Ltd., Nippon Electric Glass Co. Ltd.Inventors: Kiyotaka Komori, Seishiro Yamakawa, Shigeru Yamamoto, Jun Naka, Tadashi Kokubo
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Patent number: 5401693Abstract: Described is an inorganic fiber comprising silica dioxide, calcium oxide, and alkali oxide having a free energy of hydration greater than (more positive than) -5.00 kcal/mol, an enthalpy of formation less than (more than negative than) -210.0 kcal/mol, a dissolution rate in simulated extra cellular fluid greater than 750 (calculated as nanograms of fiber/per square centimeter of fiber surface area/per hour) having an average fiber diameter not greater than 4.5 micrometers. Also described is a method of manufacturing the fibers.Type: GrantFiled: September 18, 1992Date of Patent: March 28, 1995Assignee: Schuller International, Inc.Inventors: Jon F. Bauer, Kevin D. Schaal
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Patent number: 5350716Abstract: There is disclosed a fiber-reinforced composite having a high degree of fracture toughness and being composed of a glass-ceramic matrix reinforced with silicon carbide or graphite type fibers, the predominant crystal phase of the matrix glass-ceramic being canasite, and/or agrellite, and/or fedorite.Type: GrantFiled: August 9, 1984Date of Patent: September 27, 1994Assignee: Corning IncorporatedInventors: George H. Beall, Kenneth Chyung, Mark P. Taylor
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Patent number: 5334645Abstract: A glass fiber forming composition exhibits a remarkably high dielectric constant .epsilon..sub.r as well as superior chemical resistance, yet it is readily spun into glass fibers. The composition is characterized to show a devitrification temperature which is lower than a spinning temperature at which the glass composition exhibits a viscosity of 10.sup.2.5 poise, so as to be readily spun into corresponding glass fibers. The composition consists essentially of 40 to 65 mol % of SiO.sub.2 ; 20 to 45 mol % of at least one component selected from the group consisting of MgO, CaO, SrO and BaO; 5 to 25 mol % of at least one component selected from the group consisting of TiO.sub.2 and ZrO.sub.2 ; and 0.5 to 15 mol % of NbO.sub.5/2 as calculated from an incorporated amount of Nb.sub.2 O.sub.5. Alternately, the composition consist essentially of 40 to 65 mol % of SiO.sub.Type: GrantFiled: November 8, 1993Date of Patent: August 2, 1994Assignees: Matsushita Electric Works, Ltd., Nippon Electric Glass Co., Ltd.Inventors: Kiyotaka Komori, Seishiro Yamakawa, Shigeru Yamamoto, Jun Naka, Tadashi Kokubo
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Patent number: 5332698Abstract: Glass fibres which are distinguished by their greatly reduced carcinogenicity have an average fibre diameter of <8 .mu.m, preferably <3 .mu.m, with more than 10% of the fibres having a diameter of <3 .mu.m. The types of glass used for producing these fibres are characterized by containing the following compounds in the proportions shown in mol %:______________________________________ SiO.sub.2 55-70 B.sub.2 O.sub.3 0-4 Al.sub.2 O.sub.3 0-1 TiO.sub.2 0-6 Iron oxides 0-2 MgO 0-5 CaO 12-20 Na.sub.2 O 10-20 K.sub.2 O 0-5 fluoride 0-2.Type: GrantFiled: July 30, 1993Date of Patent: July 26, 1994Assignee: Bayer AktiengesellschaftInventors: Peter R. Nyssen, Wolfram Wagner, Geert Christoph
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Patent number: 5332699Abstract: Inorganic fibers which have a silicon extraction of greater than about 0.02 wt % Si/day in physiological saline solutions. The fiber contains SiO.sub.2, MgO, CaO, and at least one of Al.sub.2 O.sub.3, ZrO.sub.2, TiO.sub.2, B.sub.2 O.sub.3, iron oxides, or mixtures thereof. Also disclosed are inorganic fibers which have diameters of less than 3.5 microns and which pass the ASTM E-119 two hour fire test when processed into a fiber blanket having a bulk density in the range of about 1.5 to 3 pcf.Type: GrantFiled: April 23, 1993Date of Patent: July 26, 1994Inventors: Leonard E. Olds, William H. Kielmeyer
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Patent number: 5330940Abstract: This invention relates to a fiberizable glass compositions consisting essentially, expressed in terms of mole percent on the oxide basis, of at least 65% total of 5-55% ZnO, 28-40% P.sub.2 O.sub.5, 0.3-5% MoO.sub.3 and 10-35% R.sub.2 O, wherein R.sub.2 O consists of at least two alkali metal oxides in the indicated proportions selected from the group consisting of 0-25% Li.sub.2 O, 0-25% Na.sub.2 O, and 0-25% K.sub.2 O, and up to 35% total of optional ingredients in the indicated proportions selected from the group consisting of 0-10% Al.sub.2 O.sub.3, 0-15% B.sub.2 O.sub.3, 0-15% Al.sub.2 O.sub.3 +B.sub.2 O.sub.3, 0-15% Cu.sub.2 O, 0-25% Sb.sub.2 O.sub.3 0-5% F, 0-35% PbO, 0-35% SnO, 0-35% PbO+SnO, 0-5% ZrO.sub.2, 0-4% SiO.sub.2, 0-20% MgO+CaO+SrO+BaO+MnO, 0-20% MgO, 0-20% CaO, 0-20% SrO, 0-20% BaO and 0-10% MnO, and 0-5% rare earth metal oxide.Type: GrantFiled: July 6, 1992Date of Patent: July 19, 1994Assignee: Corning IncorporatedInventors: Bruce G. Aitken, George H. Beall, Candace J. Quinn
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Patent number: 5318860Abstract: An inorganic fiber sinter consists essentially of (a) an inorganic substance (I) selected from the group consisting of (i) an amorphous substance consisting essentially of Si, M, C and O, (ii) an agglomerate consisting essentially of crystalline ultrafine particles of .beta.-SiC, MC, a solid solution of .beta.-SiC with MC and/or MC.sub.1-x, and amorphous SiO.sub.2 and MO.sub.2, and (iii) a mixture of the above amorphous substance (i) and the agglomerate (ii), and (b) an inorganic substance (II) selected from the group consisting of (iv) an amorphous substance consisting essentially of Si, M and O, (v) a crystal agglomerate consisting essentially of crystalline SiO.sub.2 and MO.sub.2, and (iv) a mixture of the amorphous substance (iv) and the crystal agglomerate (v), wherein M is Ti or Zr and x is a number of more than 0 to less than 1.Type: GrantFiled: July 31, 1992Date of Patent: June 7, 1994Assignee: UBE Industries, Ltd.Inventors: Takemi Yamamura, Masaki Shibuya, Hideki Ohtsubo, Tooru Hiratuka
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Patent number: 5312806Abstract: Mineral fibers that include, by weight, 34-42% SiO.sub.2, 31-38% Al.sub.2 O.sub.3, 0-1% TiO.sub.2, 2.5-7.5% FeO, 17-21% CaO, 0.5-43% MgO, 0.3-1.5% Na.sub.2 O and 0.1-2.3% K.sub.2 O display very high temperature resistance.Type: GrantFiled: July 31, 1992Date of Patent: May 17, 1994Assignee: Rockwool International A/SInventor: Gurli Mogensen
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Patent number: 5284807Abstract: A glass fiber forming composition exhibits a remarkably high dielectric constant .epsilon..sub.r as well as superior chemical resistance, yet it is readily spun into glass fibers. The composition is characterized to show a devitrification temperature which is lower than a spinning temperature at which the glass composition exhibits a viscosity of 10.sup.2.5 poise, so as to be readily spun into corresponding glass fibers. The composition consists essentially of 40 to 65 mol % of SiO.sub.2 ; 20 to 45 mol % of at least one component selected from the group consisting of MgO, CaO, SrO and BaO; 5 to 25 mol % of at least one component selected from the group consisting of TiO.sub.2 and ZrO.sub.2 ; and 0.5 to 15 mol % of NbO.sub.5/2 as calculated from an incorporated amount of Nb.sub.2 O.sub.5. Alternately, the composition consist essentially of 40 to 65 mol % of SiO.sub.Type: GrantFiled: February 7, 1992Date of Patent: February 8, 1994Assignees: Matsushita Electric Works, Ltd., Nippon Electric Glass Co., Ltd.Inventors: Kiyotaka Komori, Seishiro Yamakawa, Shigeru Yamamoto, Jun Naka, Tadashi Kukubo
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Patent number: 5248637Abstract: Highly heat resistant glass fiber which comprises from 0.1 to 2.0 wt % of Al.sub.2 O.sub.3, from 0.1 to 2.0 wt % of TiO.sub.2, from 96 to 99.8 wt % of SiO.sub.2 and not more than 0.03 wt % of the sum of alkali metal oxides and alkaline earth metal oxides.Type: GrantFiled: April 24, 1992Date of Patent: September 28, 1993Assignee: Asahi Glass Company Ltd.Inventors: Naoki Taneda, Kouichi Numata, Takashi Mukaiyama
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Patent number: 5067975Abstract: A method of making an optical waveguide fiber with a fatigue resistant TiO.sub.2 -SiO.sub.2 outer cladding, and a substantially glass blank for drawing into optical fiber, wherein a glass soot TiO.sub.2 -SiO.sub.2 outermost layer, with an initial TiO.sub.2 concentration greater than 10.5 wt. %, is deposited on a preform, and the preform is exposed to an atmosphere of chlorine at a high temperature, and the resulting TiO.sub.2 concentration in the outermost layer of the TiO.sub.2 -SiO.sub.2 outer cladding of the substantially glass blank is less than the initial TiO.sub.2 concentration. In the glass blank form, the outermost layer includes a substantial volume percentage of crystalline phases and in the fiber form, the outermost layer includes inhomogeneities.Type: GrantFiled: December 22, 1989Date of Patent: November 26, 1991Assignee: Corning IncorporatedInventors: Marcella R. Backer, Ralston Cavender, Melanie L. Elder, Peter C. Jones, James A. Murphy
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Patent number: 5064785Abstract: An alkali-resistant glass for forming glass fibers having the composition: 54 to 65 wt. % SiO.sub.2, 18 to 25 wt. % ZrO.sub.2, 0 to 5 wt. % Li.sub.2 O, 10 to 7 wt. % Na.sub.2 O, 0.5 to 8 wt. % K.sub.2 O, 0 to 10 wt. % RO where R represents Mg, Ca, Sr, Ba, or Zn, 0.5 to 7 wt. % TiO.sub.2, and 0 to 2 wt. % Al.sub.2 O.sub.3, which glass composition is free or substantially free from F.sub.2.Type: GrantFiled: August 16, 1990Date of Patent: November 12, 1991Assignee: Nippon Electric Glass Co., Ltd.Inventors: Toru Kawamoto, Shigeru Yamamoto
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Patent number: 5063180Abstract: Low silica ceramic fiber compositions comprising from 46-49% alumina, 23-25% silica and 27-29% zirconia.Type: GrantFiled: July 16, 1990Date of Patent: November 5, 1991Assignee: A. P. Green Industries, Inc.Inventors: Robert B. Stevens, Orville Hunter, Jr.