Patents Assigned to Saint-Gobain Centre de Recherches et d'Etudes European
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Patent number: 11033863Abstract: A filter for the filtration of a fluid, such as a liquid, includes or composed of a support element made of a porous ceramic material, the element having a tubular or parallelepipedal shape delimited by an external surface and including, in its internal portion, a set of adjacent channels with axes parallel to one another and separated from one another by walls of the porous inorganic material, wherein at least a portion of the channels and/or at least a portion of the external surface are covered with a porous separating membrane layer, wherein the layer is made of a material essentially composed of sintered grains of silicon carbide (SiC), and the weight content of elemental oxygen of the layer is less than 0.5%.Type: GrantFiled: December 18, 2015Date of Patent: June 15, 2021Assignees: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEAN, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE DE MONTPELLIER, ECOLE NATIONALE SUPERIEURE DE CHIMIE DE MONTPELLIERInventors: Daniel Urffer, Christian Guizard
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Patent number: 10494308Abstract: A fused grain is essentially composed of a matrix of a magnesium aluminum oxide of MgAl2O4 spinel structure and/or of the MgO—MgAl2O4 eutectic structure, and of inclusions essentially composed of magnesium oxide. The grain has the following overall chemical composition, as percentages by weight, expressed in the form of oxides: more than 5.0% and less than 19.9% of Al2O3, Al2O3 and MgO together represent more than 95.0% of the weight of the grain. The cumulative content of CaO and of ZrO2 is less than 4000 ppm, by weight.Type: GrantFiled: September 14, 2016Date of Patent: December 3, 2019Assignee: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEANInventor: Stéphane Raffy
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Patent number: 10239793Abstract: A fused-cast refractory product including, as mass percentages on the basis of the oxides and for a total of 100% of the oxides: ZrO2+HfO2: remainder to 100%, with HfO2?5%; SiO2: 1.5% to 7.5%; Al2O3: 1.0% to 3.0%; CaO+SrO: 1.2% to 3.0%; Y2O3: 1.5% to 3.0%; Na2O+K2O: <0.15%; B2O3: <1.0%; P2O5: <0.15%; Fe2O3+TiO2: <0.55%; oxide species other than ZrO2, HfO2, SiO2, Al2O3, Na2O, K2O, B2O3, CaO, SrO, Y2O3, P2O5, Fe2O3 and TiO2: <1.5%.Type: GrantFiled: February 19, 2016Date of Patent: March 26, 2019Assignee: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEANInventors: Isabelle Cabodi, Michel Marc Gaubil, Christel Morand
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Patent number: 8980775Abstract: The invention relates to a powder comprising more than 70% of glass-ceramic and/or refractory particles, a particle of said powder being classed in the fraction called “matrix” or in the fraction called “aggregate” according to whether it is smaller than, or equal to 100 ?m, or bigger than 100 ?m, respectively, the aggregate, representing more than 60% of the powder, comprising: more than 40% of particles of a glass-ceramic material having a crystallization rate of higher than 50% and a thermal expansion value, measured at 700° C., of less than 0.3%, called “glass-ceramic grains”; less than 35% of particles of a refractory material different from a glass-ceramic material, called “refractory grains”, the quantity of refractory grains being higher than 10% if the aggregate comprises more than 40% of glass-ceramic grains having a thermal expansion value, measured at 700° C., of less than or equal to 0.Type: GrantFiled: December 21, 2010Date of Patent: March 17, 2015Assignee: Saint-Gobain Centre de Recherches et D'Etudes EuropeanInventors: Olivier Jean Francy, Eric Jorge
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Patent number: 8764514Abstract: Shot blasting particles are constituted by a ceramic material having an apparent relative density of more than 4.0 and less than 5.0 and comprising more than 5% of silica, as a percentage by weight based on the oxides.Type: GrantFiled: December 16, 2008Date of Patent: July 1, 2014Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventor: Anne-Laure Beaudonnet
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Patent number: 8551203Abstract: A molten alumina/zirconia grain mixture having the following chemical composition, in wt %: ZrO2+HfO2: 35 to 45.5%; Al2O3: 43.7 to 65%; other oxides: <10%; SiO2: <0.8%, which simultaneously adheres to a granulometric condition and to a densimetric condition.Type: GrantFiled: March 11, 2010Date of Patent: October 8, 2013Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventors: Samuel Marlin, David Langohr, Anthony Gaeta
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Publication number: 20130199244Abstract: The present invention relates to a molten, fluid refractory product comprising, in weight percentages on the basis of the oxides and for a total of 100% of the oxides: ZrO2+Hf2O: remainder to 100% 4.0%<SiO2<6.5% Al2O3?0.75% 0.2%<B2O3<1.5% 0.3%<Ta2O5 Nb2O5+Ta2O5<1.4% Na2O+K2O<0.2% BaO<0.2% P2O5<0.15% Fe2O3+TiO2<0.55% other oxide species: <1.5% the “A/B” ratio of Al2O3/B2O3 content by weight being no higher than 1.50. The invention can be used in glass melting furnaces.Type: ApplicationFiled: January 28, 2011Publication date: August 8, 2013Applicant: Saint Gobain Centre De Recherches Et D'Etudes EuropeanInventors: Isabelle Cabodi, Michel Gaubil
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Patent number: 8273674Abstract: A refractory self-flow filler mortar, includes in mass % with relation to the basic refractory material, at least 1% and at most 10% of non-granulated spherical particles with median size greater than 0.1 ?m and less than or equal to 2 mm and further includes in mass % with relation to the total dry mass of the mortar, less than 4.5% of silica (SiO2) and between 1% and 8% water, the standard deviation of the non-granulated spherical particle size being less than 100%.Type: GrantFiled: December 15, 2006Date of Patent: September 25, 2012Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventors: Thibault Champion, Christian Claude His, Franceline Marguerite Louise Villermaux
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Patent number: 8236719Abstract: Sintered product produced from a starting charge containing 75 to 99% zircon, and having the following average chemical composition by weight, the percentages by weight being based on the oxides: 60%<ZrO2+HfO2<75%; 27%<SiO2<34%; O<TiO2; O<Y2O3<3.5%; 0.1%<Nb2O5+Ta2O5<=5%; and other oxides: <1.5%; for a total of 100%, The sintered product may be used in a glass furnace.Type: GrantFiled: October 15, 2007Date of Patent: August 7, 2012Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventors: Olivier Citti, Julien Fourcade
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Publication number: 20120132045Abstract: The invention relates to a suspension including a set of abrasive grains and a binder, said suspension being characterized in that: the particle size fraction D40-D60 of said set of abrasive grains comprises more than 15 vol % and less than 80 vol % of grains having a circularity of less than 0.85, the percentiles D40 and D60 being the percentiles of the cumulative particle size distribution curve of grain sizes corresponding to the grain sizes enabling the separation of the fractions consisting of 40 and 60 vol % of the grains having the largest size, respectively; and the abrasive grains are more than 25 wt % and less than 49.5 wt % of said suspension.Type: ApplicationFiled: July 9, 2010Publication date: May 31, 2012Applicant: Saint-Gobain Centre de Recherches et D'etudes EuropeanInventors: Ana-Maria Popa, Jan Olaf Roszinski, Siv M. Emanuelsen, Fabio Neuman
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Patent number: 8066798Abstract: A method for selecting a filtering structure for a gas laden with particulates, said structure comprising a filtering part formed from a porous ceramic material and comprising at least one, and preferably a plurality, of porous walls, said method being characterized in that, starting from a first image of the surface of the wall, a processing operation is carried out on said first image comprising a morphological erosion by a structuring element in such a manner as to obtain a second characteristic image of the regularity and of the uniformity of the microstructure of said wall. Silicon carbide filtering structure obtained by application of said method.Type: GrantFiled: November 29, 2006Date of Patent: November 29, 2011Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventors: Celine Wiss, Patrick Jacques Dominique Girot
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Patent number: 8043392Abstract: The mixture of molten alumina-zircon grains has the following chemical composition in percentage by weight to give 100%: 40-45.5% ZrO+HfO2; 46-58% Al2O3; 0-10% additive; <0.8% SIO2 and <1,2% impurities. The mixture is characterised in that the degree of impurity-containing grains is less than 2% and the nodule concentration measured on the section of any grain of the mixture is greater than 500 nodules per mm2 in at least 50% of cases.Type: GrantFiled: June 23, 2005Date of Patent: October 25, 2011Assignee: Saint Gobain Centre de Recherches et d'Etudes EuropeanInventor: Samuel Marlin
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Patent number: 8002861Abstract: Abrasive grain powder, in particular intended for machining silicon ingots, such that the granulometric fraction D40-D60 comprises more than 15% and less than 80%, as percentages by volume, of grains having circularity of less than 0.85.Type: GrantFiled: February 6, 2009Date of Patent: August 23, 2011Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventors: Yves Boussant-Roux, Jostein Mosby, Ana-Maria Popa, Arne Menne, Abhaya Kumar Bakshi
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Patent number: 7910508Abstract: The inventive sintered product is produced from an initial feedstock having a zirconium content ranging from 75 to 99% and the following average chemical weight composition, in percentage by weight, based on oxides: 60%=ZrO2+HfO2=75%, 27%=SiO2=34%, 0.2=TiO2=1.5 %, 0.3<Y2O3=3.5 %, other oxides: =1%, to give a total of 100%. Said product can be used for glassworks.Type: GrantFiled: March 31, 2006Date of Patent: March 22, 2011Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventors: Michel Gaubil, Yves Boussant-Roux, Charles McGarry, Isabelle Cabodi, Olivier Citti
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Patent number: 7905939Abstract: A filter block, particularly for filtering particulates present in the exhaust gases of an internal combustion engine, including peripheral inlet (50,14p2) and outlet (52,14p1) channels arranged alternately at the periphery of the block and each including an external wall (44;54;401,402;403) exposed to the exterior of the block and an internal wall (46;56;404,405;406,407,408) arranged inside the block. The block according to the invention is remarkable in that it includes at least one group (G) of two adjacent peripheral channels (50,52) such that, in a transverse plane of section (P), the ratio R of the average thickness “E” of all the external walls (44,54) of the group (G) to the average thickness “e” of all the internal walls (46,56) of the (G) is greater than 1.2.Type: GrantFiled: December 22, 2004Date of Patent: March 15, 2011Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventors: Sébastien Bardon, Anthony Briot, Vincent Gleize
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Patent number: 7687422Abstract: A novel fused and cast refractory product with a high zirconia content having improved electrical resistivity includes, as a percentage by weight relative to the oxides and for a total of more than 98.5%: ZrO2 + Hf2O: >85% SiO2: 2% to 10% Al2O3: 0.1% to 2.4%, with Al2O3/SiO2 <0.5 Y2O3: ?1%, B2O3: <1.5%; and a dopant selected from the group formed by V2O5, CrO3, Nb2O5, MoO3, Ta2O5, WO3, and mixtures thereof, in a weighted quantity such that: 0.2%?2.43V2O5+8.84CrO3+1.66Nb2O5+6.14MoO3+Ta2O5+3.81WO3.Type: GrantFiled: February 23, 2007Date of Patent: March 30, 2010Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventors: Yves Boussant-Roux, Isabelle Cabodi, Michel Gaubil
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Patent number: 7658779Abstract: The invention relates to a honeycomb monolithic element for the filtration of particles, characterized in that the peripheral channels forming part of the outer wall of said element are configured to help in the formation of an outer wall whose inner face is substantially flat over the whole length of the element and in that said flat wall also has an increased thickness at the corners, so that, on a cross section, the ratio R of the thickness Ec of the wall, measured along the bisecting line of the angle at a corner of the element, over the minimal thickness Emin of said wall is greater than 1.5.Type: GrantFiled: December 6, 2006Date of Patent: February 9, 2010Assignee: SAINT-GOBAIN Centre de Recherches et d'Etudes EuropeanInventors: Francisco Jose Carranza, David E. Woolley, Andrew K. Leighton
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Patent number: 7642211Abstract: An AZS type fused cast refractory product presenting the following chemical composition, as a percentage by weight: ZrO2: 15.5% to 22%; SiO2: 10.5% to 15%; Na2O+K2O+Li2O: 1.0% to 2.5%; impurities: <1%. Application to glass furnaces, in particular to the superstructures and crowns thereof.Type: GrantFiled: September 14, 2005Date of Patent: January 5, 2010Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventors: Yves Boussant-Roux, Isabelle Cabodi, Michel Gaubil
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Patent number: 7563517Abstract: The invention relates to a metal coating for a utensil for cooking food products. The coating consists of an aluminum-based alloy containing more than 80% by weight of one or more quasicrystalline or approximant phases, having the composition Ala(Fe1-xXx)b(Cr1-yYy)cZzJj in which: X represents one or more elements isoelectronic with Fe, chosen from Ru and Os; Y represents one or more elements isoelectronic with Cr, chosen from Mo and W; Z is an element or a mixture of elements chosen from Ti, Zr, Hf, V, Nb, Ta, Mn, Re, Rh, Ni and Pd; J represents the inevitable impurities other than copper; a+b+c+z=100; 5?b?15; 10?c?29; 0?z?10; xb?2; yc?2; and j<1.Type: GrantFiled: February 9, 2005Date of Patent: July 21, 2009Assignees: Saint Gobain Centre de Recherches et d-Etudes European “Les Miroirs”, Centre National de la Recherche ScientifiqueInventors: Stéphane Raffy, Jean-Marie Dubois, Valérie Demange, Marie-Cécile De Weerd
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Patent number: 7503955Abstract: A filter body (3) which is intended, in particular, for the filtration of particles contained in the exhaust gases from an internal combustion engine. The filter body (3) is formed by bonding filter blocks (11) using a joint (17). An outer surface (16) of the first of the blocks (11), which is disposed opposite the second of the blocks (11) and which is in contact with the joint (17), includes at least one projection- and/or cavity-type irregularity (30a, 30b).Type: GrantFiled: July 12, 2004Date of Patent: March 17, 2009Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventor: Sébastien Bardon