Patent application number | Description | Published |
20080202086 | HONEYCOMB FILTER - A honeycomb filter includes a plurality of honeycomb fired bodies each having a longitudinal direction and a plurality of cells which are divided by cell walls and which extend in the longitudinal direction in substantially parallel with each other, each of the cells having one end sealed; and an adhesive material binding the plurality of honeycomb fired bodies. The plurality of honeycomb fired bodies includes outer peripheral honeycomb fired bodies each having a first outer wall and positioned at an outermost periphery of the honeycomb filter; and inner honeycomb fired bodies surrounded by the outer peripheral honeycomb fired bodies. Each of the inner honeycomb fired bodies has a second outer wall thinner than the first outer wall. | 08-28-2008 |
20080202087 | HONEYCOMB STRUCTURE - A honeycomb structure is provided that includes a plurality of pillar-shaped honeycomb fired bodies, each having a number of cells longitudinally disposed in parallel with one another with a cell wall therebetween. An adhesive layer is interposed between adjacent honeycomb fired bodies of the plurality of honeycomb fired bodies to combine the plurality of honeycomb fired bodies together, and a sealing material layer is formed on an outer peripheral face of the combined plurality of honeycomb fired bodies. At least two honeycomb fired bodies of the plurality of honeycomb fired bodies have an outer wall that forms a portion of the outer peripheral face of the combined plurality of honeycomb fired bodies. At least one of the outer walls has a protruding portion extending from a surface thereof, and the protruding portion is made from a same material as a material of the at least one outer wall. | 08-28-2008 |
20080203626 | METHOD FOR MANUFACTURING HONEYCOMB STRUCTURE EXTRUSION-MOLDING METHOD FOR FORMING COUPLED HONEYCOMB MOLDED BODY AND DIE FOR EXTRUSION-MOLDING METHOD - A method is provided that includes extrusion-molding a raw material composition containing ceramic powder and a binder to manufacture a coupled honeycomb molded body having a shape in which a plurality of pillar-shaped honeycomb molded bodies, each having a number of cells disposed in parallel with one another in a longitudinal direction with a cell wall therebetween, are integrated with one another by interposing a coupling portion. The method includes firing the coupled honeycomb molded body to manufacture a coupled honeycomb fired body, cutting the coupling portion to manufacture coupling-portion-cut honeycomb fired bodies, and binding a plurality of honeycomb fired bodies by interposing an adhesive layer, where at least one of the bound honeycomb fired bodies is a coupling-portion-cut honeycomb fired body. | 08-28-2008 |
20080236394 | HONEYCOMB STRUCTURE AND METHOD FOR MANUFACTURING HONEYCOMB STRUCTURE - A honeycomb structure includes a ceramic block formed by a plurality of pillar-shaped honeycomb fired bodies each having a large number of cells longitudinally disposed in parallel with one another with a cell wall between the cells. The plurality of honeycomb fired bodies are combined with one another by interposing an adhesive layer with a sealing material layer formed on a peripheral face of the ceramic block and include a plurality of different shapes of the honeycomb fired bodies. A thickness of a peripheral wall forming the peripheral face of the ceramic block is virtually even. A shape of a cell located at an outermost periphery of the ceramic block is virtually identical with a shape of a cell located at a place other than the outermost periphery of the ceramic block. On the peripheral wall of the honeycomb fired body, a step is provided. | 10-02-2008 |
20080237941 | METHOD FOR MANUFACTURING HONEYCOMB STRUCTURE - A honeycomb structure is manufactured by molding a pillar-shaped honeycomb molded body having a large number of cells disposed in parallel with one another in a longitudinal direction with a cell wall therebetween by extrusion-molding a raw material composition including a ceramic powder and a binder, and carrying out a firing treatment on the honeycomb molded body to manufacture a honeycomb fired body. A plurality of the honeycomb fired bodies are provided, and both end faces of each of the plurality of the honeycomb fired bodies are hold with a holding member after positioning the plurality of the honeycomb fired bodies on a predetermined position. An adhesive paste is injected into a gap between the plurality of honeycomb fired bodies held on the predetermined position. The adhesive paste is dried and solidified to form an adhesive layer. | 10-02-2008 |
20080241015 | HONEYCOMB FILTER FOR PURIFYING EXHAUST GASES, ADHESIVE, COATING MATERIAL, AND MANUFACTURING METHOD OF HONEYCOMB FILTER FOR PURIFYING EXHAUST GASES - An object of the present invention is to provide a honeycomb filter for purifying exhaust gases which makes it possible to alleviate a thermal stress generated due to occurrence of a local temperature change and which is less likely to generate cracks and superior in strength and durability, an adhesive that has a low thermal capacity and is capable of alleviating the thermal stress, a coating material that has a low thermal capacity with a superior heat insulating property and is capable of alleviating the thermal stress, and a manufacturing method of the honeycomb filter for purifying exhaust gases that can improve precision in the outside dimension, and reduce damages in the manufacturing processes. | 10-02-2008 |
20080241501 | HONEYCOMB STRUCTURE AND METHOD FOR MANUFACTURING HONEYCOMB STRUCTURE - A honeycomb structure includes a plurality of pillar-shaped honeycomb fired bodies bound with one another by interposing a adhesive layer. Each of the honeycomb fired bodies has a large number of cells longitudinally placed in parallel with one another with a cell wall therebetween. An adhesive strength A between central portion honeycomb fired bodies out of the honeycomb fired bodies measured by a three-point bending strength test is at least about 0.02 and at most about 0.2 MPa. The central portion honeycomb fired bodies are positioned at a central portion of a cross-section formed by cutting the honeycomb structure perpendicularly to the longitudinal direction. The adhesive strength A is lower than an adhesive strength B between peripheral portion honeycomb fired bodies out of the honeycomb fired bodies measured by the three-point bending strength test. The peripheral portion honeycomb fired bodies form a part of a periphery the honeycomb structure. | 10-02-2008 |
20080260599 | HONEYCOMB FILTER AND EXHAUST GAS PURIFYING APPARATUS - A honeycomb filter includes a honeycomb fired body having cells longitudinally disposed either end of each cell being sealed. The honeycomb filter includes an outlet-side catalyst supporting area, an inlet-side catalyst supporting area, and a catalyst unsupporting area formed between the catalyst supporting areas. A thermal conductivity of the catalyst unsupporting area is larger than those of the catalyst supporting areas. Y (%), Z (%), and X (%) satisfy the following inequalities, about 1≦Y≦about 19, (880−70Y)/9≦Z≦(825−15Y)/9 (about 1≦Y≦about 10), (330−15Y)/9≦Z≦(1375−70Y)/9 (about 10≦Y≦about 19), and X=100−Y−Z in which Y, Z, X indicate a ratio of a length of the outlet-side catalyst supporting area, the inlet-side catalyst supporting area, the catalyst unsupporting area, respectively, to an entire length of the honeycomb filter. | 10-23-2008 |
20080286523 | HONEYCOMB STRUCTURE AND METHOD OF MANUFACTURING THE HONEYCOMB STRUCTURE - A honeycomb structure includes a ceramic block formed by bonding a plurality of pillar-shaped honeycomb fired bodies by interposing an adhesive layer therebetween, and a sealing material layer provided on the periphery of the ceramic block. Each of the honeycomb fired bodies has a large number of cells disposed in parallel with one another in a longitudinal direction with a cell wall therebetween. The adhesive layer and the sealing material layer are integrally formed with substantially no interface to divide the two layers. | 11-20-2008 |
20090095416 | METHOD FOR MANUFACTURING HONEYCOMB STRUCTURE - A method for manufacturing a honeycomb structure includes molding a raw material composition to manufacture a plurality of honeycomb molded bodies. Each of the plurality of honeycomb molded bodies has a number of cells longitudinally placed substantially in parallel with one another with a cell wall interposed therebetween. The plurality of honeycomb molded bodies are fired to manufacture a plurality of honeycomb fired bodies. A water retention adhesive paste containing a water retention agent is prepared. The plurality of honeycomb fired bodies are bonded to one another by using the water retention adhesive paste and forming an adhesive layer to manufacture a honeycomb aggregated body. | 04-16-2009 |
20090098333 | HONEYCOMB STRUCTURE AND METHOD FOR MANUFACTURING THE HONEYCOMB STRUCTURE - A honeycomb structure includes honeycomb fired bodies having cell walls extending along the longitudinal direction to define a plurality of cells, and an outer wall at the outermost peripheral face. The fired bodies are connected at the outer wall by an adhesive layer. The cell wall has a thickness of at least about 0.15 mm and at most about 0.30 mm. A thickness of a border wall is at least about 5 times greater and at most about 20 times greater than the thickness of the cell wall. The border wall includes the adhesive layer, and first and second outer walls which are connected to each other. The catalyst permeation preventive region is provided in the outer wall or between the outer wall and the adhesive layer. The catalyst permeation preventive region includes at least one of a water repellent material, a cation exchanger and water absorbing material. | 04-16-2009 |
20090246099 | HONEYCOMB STRUCTURE AND EXHAUST GAS TREATING APPARATUS - A honeycomb structure includes a first end face, a second end face, a honeycomb unit, and an ammonia adsorbing material. The second end face is located opposite to the first end face along a longitudinal direction of the honeycomb structure. The honeycomb unit has plural cell walls extending along the longitudinal direction from the first end face to the second end face to define plural cells. The cell walls include a NOx adsorbing material and an inorganic binder. The ammonia adsorbing material is supported on the cell walls. An amount of the ammonia adsorbing material supported on the cell walls is varied between the first end face and the second end face. | 10-01-2009 |
20090246103 | HONEYCOMB STRUCTURE AND METHOD FOR MANUFACTURING THE SAME - A honeycomb structure includes at least one honeycomb unit having one end face and another end face opposite to the one end face along a longitudinal direction of the at least one honeycomb unit. The at least one honeycomb unit includes an inorganic binder, inorganic particles, cell walls extending along the longitudinal direction from one end face to the another end face to define plural cells, and third material provided on the cell walls. The inorganic particles include first and second materials. The first material includes NOx adsorption material. The second material includes ammonia adsorption material. | 10-01-2009 |
20090246450 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit having a first end face and a second end face. The at least one honeycomb unit includes an inorganic binder, inorganic particles, and cell walls extending from the first end face to the second end face to define a plurality of cells. The inorganic particles include ceria particles doped with zirconia. A percentage by weight of zirconia doped in ceria in the ceria particles is in a range of about 20% to about 50%. | 10-01-2009 |
20090247394 | HONEYCOMB STRUCTURE - A honeycomb structure includes adhesive layers and plural honeycomb units bonded to each other by interposing the adhesive layers between the plural honeycomb units. Each of the honeycomb units has partition walls extending along a longitudinal direction of the honeycomb units to define plural through holes. The plural honeycomb units include a SOx absorbent, inorganic particles, and an inorganic binder. An expression Y≦−0.3X+1.55 (about 1.0≦X≦about 2.5) is satisfied, in which X represents a content (mol/L) of the SOx absorbent in the partition walls and Y represents a ratio B/A in which A represents a Young's modulus of the honeycomb units and B represents a Young's modulus of the adhesive layers. | 10-01-2009 |
20090247395 | HONEYCOMB STRUCTURAL BODY - A honeycomb structural body includes at least one honeycomb unit which has a longitudinal direction. The at least one honeycomb unit includes plural cell walls, an inorganic binder, and inorganic particles. The plural cell walls extends along the longitudinal direction from one end face to another end face of the at least one honeycomb unit to define plural cells. The inorganic particles include ceria particles, and a ceramic material which has a degree of self-sintering lower than a degree of self-sintering of the ceria particles. | 10-01-2009 |
20090291032 | HONEYCOMB STRUCTURE, EXHAUST GAS CLEANING UNIT, AND MANUFACTURING METHOD OF HONEYCOMB STRUCTURE - A honeycomb structure includes an inorganic particle, inorganic binder, a honeycomb unit, a first end face, and a second end face. The honeycomb unit includes plural partition walls extending along a longitudinal direction of the honeycomb unit to define through-holes. The first end face is substantially perpendicular to the longitudinal direction and provided at a first end of the honeycomb structure. The second end face is substantially perpendicular to the longitudinal direction and provided at a second end opposite to the first end in the longitudinal direction of the honeycomb structure. First circularity of the first end face and second circularity of the second end face are about 1.5 mm to about 4.0 mm. The circularity of the first end face is different from the circularity of the second end face. | 11-26-2009 |
20090291034 | HONEYCOMB STRUCTURE, EXHAUST GAS CONVERSION APPARATUS, AND MANUFACTURING METHOD OF THE HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit including zeolite, an inorganic binder, and cell walls. The cell walls extend from a first end face to a second end face to define cells along a longitudinal direction of the at least one honeycomb unit. Each of the cell walls includes a center part in the longitudinal direction and a first end part adjacent to the first end face. The first end part has a thickness larger than a thickness of the center part, and/or the first end part has a porosity smaller than a porosity of the center part. | 11-26-2009 |
20090291252 | HONEYCOMB STRUCTURE AND MANUFACTURING METHOD OF THE HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit having opening ratio (P) of at least approximately 50% and at most approximately 65% and a cell density ρ of at least approximately 31/cm | 11-26-2009 |
20090291253 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit. The at least one honeycomb unit has a longitudinal direction and includes zeolite and an inorganic binder. A content of the zeolite per apparent unit volume of the at least one honeycomb unit is about 230 g/L or greater. The at least one honeycomb includes plural cell walls extending from one end face to another end face along the longitudinal direction to define plural cell walls. A porosity of substantially all pores in the cell walls is about 40% or less. A porosity of pores having diameters in a range of about 0.005 μm through about 0.02 μm in the cell walls is about 5% or greater. A porosity of pores having diameters in a range of about 0.05 μm through about 0.2 μm in the cell walls is about 17.5% or greater. | 11-26-2009 |
20090291254 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit. The at least one honeycomb unit has a longitudinal direction and includes plural cell walls extending from one end face to another end face along the longitudinal direction to define plural cells. The at least one honeycomb unit includes inorganic particles, an inorganic binder, and inorganic fibers. A degree of orientation of the inorganic fibers in an a-axis direction parallel to the longitudinal direction is about 0.5 or less. | 11-26-2009 |
20090291255 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit. The at least one honeycomb unit has cell walls extending from one end face to another end face of the at least one honeycomb unit along a longitudinal direction of the at least one honeycomb unit to define cells. The at least one honeycomb unit includes zeolite, inorganic particles, and inorganic binder. The zeolite includes a hydroxyl group. The inorganic particles includes a hydroxyl group. A hydroxyl group content in the inorganic particles is greater than a hydroxyl group content in the zeolite. | 11-26-2009 |
20090291256 | HONEYCOMB STRUCTURE - A honeycomb structure includes a honeycomb unit which has zeolite, inorganic binder, and cell walls extending from one end to another end along a longitudinal direction of the honeycomb unit to define cells. An amount of zeolite contained per apparent unit volume of the honeycomb unit is approximately 230 g/L or more. Mathematical formulae [1] and [2] are satisfied when a thickness of the cell walls is defined as X mm and an average pore diameter of a surface of the cell walls observed by a microscope is defined as Y μm: | 11-26-2009 |
20090291824 | HONEYCOMB STRUCTURE - A honeycomb structure includes a honeycomb structure includes a honeycomb unit. The honeycomb unit has thermal conductivity equal to or greater than about 0.15 W/m/K but less than or equal to about 0.60 W/m/K and has Young's modulus equal to or greater than about 1.5 MPa but less than or equal to about 7.0 Mpa. The honeycomb unit includes zeolite, an inorganic binder, and partition walls. The partition walls extend along a longitudinal direction of the honeycomb unit to define plural through holes. | 11-26-2009 |
20090291825 | HONEYCOMB STRUCTURE - A honeycomb structure includes a honeycomb unit containing zeolite and an inorganic binder and having cell walls extending from one end to another end along a longitudinal direction of the honeycomb unit to define cells. An amount of zeolite contained per apparent unit volume of the honeycomb unit is approximately 230 g/L or more. A thickness X mm of the cell walls is in a range from approximately 0.15 mm to approximately 0.35 mm. A mathematical formula 40X+20≦Y≦40X+30 is satisfied when a porosity of the cell walls is defined as Y %. | 11-26-2009 |
20090291826 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit. The at least one honeycomb unit includes zeolite, inorganic binder, and cell walls extending from a first end face to a second end face along a longitudinal direction of the at least one honeycomb unit to define cells. The at least one honeycomb unit includes a cross-sectional surface orthogonal to the longitudinal direction having a substantially square shape. An aperture ratio of the at least one honeycomb unit is in a range from about 50% to about 65%. A formula 12.5V+5011-26-2009 | |
20090291827 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit and a coat layer provided at a peripheral surface of the honeycomb structure. The honeycomb unit includes zeolite, an inorganic binder, and cell walls extending from a first end face to a second end face of the honeycomb unit along a longitudinal direction of the honeycomb unit to define cells. A ratio κc/κh is equal to or larger than about 0.75 and equal to or smaller than about 1.25. Ec/Eh is equal to or larger than about 0.75 and equal to or smaller than about 1.25. The κc and κh are coefficients of thermal expansion of the coat layer and the honeycomb unit, respectively, in a radial direction of the honeycomb structure. The Ec and Eh are Young's moduli of the coat layer and the honeycomb unit, respectively, in the radial direction of the honeycomb structure. | 11-26-2009 |
20090291828 | HONEYCOMB STRUCTURE - A honeycomb structure includes a plurality of honeycomb units and an adhesive layer. Each of the plurality of honeycomb units has a longitudinal direction and includes zeolite, an inorganic binder, a first end face, a second end face, and a cell wall. The second end face is located opposite to the first end face in the longitudinal direction. The cell wall extends from the first end face to the second end face along the longitudinal direction to define cells. The adhesive layer includes zeolite and is provided between the plurality of honeycomb units to connect the plurality of honeycomb units. A ratio of a coefficient of thermal expansion of the adhesive layer to a coefficient of thermal expansion of each of the plurality of honeycomb units is in a range from approximately 0.8 to approximately 1.2. | 11-26-2009 |
20090291830 | HONEYCOMB STRUCTURE - A honeycomb structure includes a center area, an outer peripheral area, and at least one honeycomb unit having a longitudinal direction. The center area has a smaller similarity shape in relation to a peripheral shape of the honeycomb structure in a cross section perpendicular to the longitudinal direction. The smaller similarity shape is defined by including a center of the honeycomb structure and substantially a half of a length from the center to the peripheral shape of the honeycomb structure. The outer peripheral area is located outside the smaller similarity shape. An aperture ratio of the honeycomb structure is from approximately 50% to approximately 65% in the cross section of the honeycomb structure. The aperture ratio includes a first aperture ratio in the outer peripheral area and a second aperture ratio in the center area. The first aperture ratio is larger than the second aperture ratio. | 11-26-2009 |
20090291831 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit. The honeycomb unit includes plural cell walls to define plural cells, about 61 to about 70 mass % of zeolite, about 15 to about 25 mass % of an inorganic fiber, and about 10 to about 20 mass % of alumina other than alumina included in the zeolite and the inorganic fiber. The honeycomb unit has an opening ratio (%) of about 57% or more. The opening ratio is equal to or less than y shown in a formula of y=0.55x+30 when a content x (mass %) of the zeolite included in the honeycomb unit is less than about 66 mass %. The opening ratio is equal to or less than y shown in a formula of y 32 −0.25x+82.8 when the content x (mass %) is about 66 mass % or more. | 11-26-2009 |
20090291832 | HONEYCOMB STRUCTURE - A honeycomb structure includes a first end face, a second end face, and at least one honeycomb unit. The second end face is disposed opposite the first end face along a longitudinal direction of the honeycomb structure. The at least one honeycomb unit has plural cell walls extending along the longitudinal direction from the first end face toward the second end face to define plural cells. The at least one honeycomb unit includes about 50 mass % to about 60 mass % of zeolite, about 15 mass % to about 25 mass % of inorganic fibers, about 20 mass % to about 32 mass % of alumina that is not contained in the zeolite or the inorganic fibers, and an opening ratio Y(%). The opening ratio Y(%) satisfies an expression about 57≦Y≦0.7X+25, where X (mass %) is a zeolite content of the at least one honeycomb unit. | 11-26-2009 |
20090291833 | HONEYCOMB STRUCTURE - A honeycomb structure includes center and peripheral regions. The center region has a smaller similarity shape in relation to a peripheral shape of the honeycomb structure in a cross section perpendicular to the longitudinal direction. The peripheral region is located outside the smaller similarity shape. Zeolite ion-exchanged with at least one of Cu, Mn, Ag, and V is present at a first weight ratio and a second weight ratio in the center region and the peripheral region, respectively, relative to a total weight of the zeolite. The second weight ratio is larger than the first weight ratio. Zeolite ion-exchanged with at least one of Fe, Ti, and Co is present at a third weight ratio and a fourth weight ratio in the center region and the peripheral region, respectively, relative to a total weight of the zeolite. The third weight ratio is larger than the fourth weight ratio. | 11-26-2009 |
20090291834 | HONEYCOMB STRUCTURE - A honeycomb structure includes a honeycomb unit and a coating layer. The honeycomb unit includes inorganic particles, an inorganic binder, and partition walls. The partition walls extend along a longitudinal direction of the honeycomb unit to define plural through holes. The coating layer defines a periphery of the honeycomb structure. A ratio of a specific heat capacity of the coating layer to a specific heat capacity of the honeycomb unit is about 1.0 or less. | 11-26-2009 |
20090291835 | HONEYCOMB STRUCTURE AND PROCESS FOR MANUFACTURING HONEYCOMB STRUCTURE - A honeycomb structure includes a honeycomb unit having inorganic particles, an inorganic binder and inorganic fibers. A value of (D90-D10)/D50, which indicates a length distribution of the inorganic fibers, is about two or less, where, when the fiber length is taken in a horizontal axis and a volume frequency is taken in a vertical axis, D10 is a fiber length at 10% by volume, D50 is a fiber length at 50% by volume, and D90 is a fiber length at 90% by volume, where D1011-26-2009 | |
20090291836 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit which includes walls. The walls have a thickness of from about 0.10 mm to about 0.50 mm and extend along a longitudinal direction of the honeycomb structure to define through-holes. The honeycomb structure has a center area inside a boundary line passing through positions located at substantially a half of a length from a center of the honeycomb structure to a periphery of the honeycomb structure in a cross section perpendicular to the longitudinal direction. The honeycomb structure has a peripheral area outside the boundary line. A thickness of the walls located in the peripheral area is larger than a thickness of the walls located in the center area. A first opening ratio in the center area in the cross section is larger than a second opening ratio in the peripheral area in the cross section. | 11-26-2009 |
20090291839 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit. In a pore distribution curve, the at least one honeycomb unit has one or more peak values of the log differential pore volume in a pore diameter range from about 0.006 μm to 0.06 μm and greater than 0.06 μm and less than or equal to about 1 μm. A volume of pores having diameters in a range from a peak pore diameter minus 0.03 μm to plus 0.03 μm is from about 60% to about 95% of a volume of pores having diameters greater than 0.06 μm and less than or equal to about 1 μm. The peak pore diameter corresponds to a highest one of the peak values of the log differential pore volume in the pore diameter range greater than 0.06 μm and less than or equal to about 1 μm. | 11-26-2009 |
20090291840 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit having a longitudinal direction and including cell walls extending along the longitudinal direction from one end face to another end face to define cells. The at least one honeycomb unit includes inorganic particles, inorganic binder, and inorganic fibers. The inorganic fibers include a bio-soluble inorganic compound. | 11-26-2009 |
20090291841 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit and a peripheral wall at a peripheral surface connecting one end face and another end face of the honeycomb structure. The honeycomb unit includes inorganic particles, an inorganic binder, and cell walls extending along a longitudinal direction of the at least one honeycomb unit to define cells. The at least one honeycomb unit has a b-axis compression strength of about 1.0 MPa or less. A thickness T of the peripheral wall of the honeycomb structure is larger than 0.42V-0.25 (mm), where V is a volume of the honeycomb structure and in a range from about 1.0 liters to about 10 liters. | 11-26-2009 |
20090305873 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit having a longitudinal direction and including zeolite, an inorganic binder, and walls. The zeolite includes a first zeolite ion-exchanged with at least one of Cu, Mn, Ag, and V and a second zeolite ion-exchanged with at least one of Fe, Ti, and Co. Each wall has first and second surfaces which extend along the longitudinal direction and define a thickness of each wall. A ratio of the first zeolite by weight to a total weight of the first and second zeolites at a center of the thickness of each wall is larger than the ratio of the first zeolite at the first or second surface. A ratio of the second zeolite by weight to the total weight at the first or second surface is larger than the ratio of the second zeolite at the center of the thickness of each wall. | 12-10-2009 |
20090311146 | EXHAUST GAS TREATING APPARATUS - An exhaust gas treating apparatus includes an upstream honeycomb structure and a downstream honeycomb structure each provided along an exhaust gas flowing direction of the exhaust gas treating apparatus. Each of the plurality of honeycomb structures includes at least one honeycomb unit includes zeolite, an inorganic binder, and walls. A first ratio of weight of zeolite ion-exchanged with at least one of Cu, Mn, Ag, and V in the downstream honeycomb structure is greater than a first ratio of weight of zeolite ion-exchanged with at least one of Cu, Mn, Ag, and V in the upstream honeycomb structure. A second ratio of weight of zeolite ion-exchanged with at least one of Fe, Ti, and Co in the upstream honeycomb structure is greater than a second ratio of weight of the zeolite ion-exchanged with at least one of Fe, Ti, and Co in the downstream honeycomb structure. | 12-17-2009 |
20100055386 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit. The at least one honeycomb unit has a longitudinal direction and includes an inorganic binder, a cell wall, and xeolite. The cell wall extends from a first end face to a second end face of the at least one honeycomb unit along the longitudinal direction to define cells. The at least one honeycomb unit includes the zeolite in an amount exceeding approximately 250 g/L per apparent volume. The xeolite is present at a first concentration at a center part of a thickness of the cell wall and at a second concentration at a surface of the cell wall. The second concentration is larger than the first concentration. | 03-04-2010 |
20110115136 | MANUFACTURING METHOD OF HONEYCOMB STRUCTURAL BODY - A method of manufacturing a honeycomb structural body includes performing a heat treatment on zeolite particles that have undergone an iron ion-exchange. The heat treatment is performed in a non-oxygenated atmosphere having a temperature within a range of approximately 500° C. through approximately 800° C. to obtain heat-treated zeolite particles. A honeycomb molded body is formed from a raw material including the heat-treated zeolite particles. The honeycomb molded body is fired to manufacture a honeycomb unit. The honeycomb structural body includes the honeycomb unit including plural cells extending from a first end face to a second end face in a longitudinal direction. The plural cells are partitioned by cell walls. | 05-19-2011 |
20110116982 | HONEYCOMB STRUCTURE AND EXHAUST GAS CONVERTER - A honeycomb structure includes at least one honeycomb unit. The at least one honeycomb unit has a plurality of through holes defined by partition walls along a longitudinal direction of the honeycomb unit. The honeycomb unit includes zeolite, an inorganic binder, and a noble metal catalyst. The noble metal catalyst is supported in a region of the honeycomb unit. The region extends from one end portion of the honeycomb unit in the longitudinal direction over approximately 1.5% or more to approximately 20% or less of an overall length of the honeycomb unit in the longitudinal direction. | 05-19-2011 |
20110116983 | HONEYCOMB STRUCTURE AND EXHAUST GAS CONVERTER - A honeycomb structure includes at least one honeycomb unit. The honeycomb unit includes a first region, a second region different from the first region, an inorganic binder, and zeolite. The first region extends from one end of the honeycomb unit over approximately 30% or more and approximately 70% or less of an overall length of the honeycomb unit in the longitudinal direction. The zeolite includes a first zeolite and a second zeolite. The first zeolite is ion-exchanged with a first metal and has a mass content. The second zeolite is ion-exchanged with a second metal and has a mass content that is smaller than the mass content of the first metal in the first region and larger than the mass content of the first metal in the second region. | 05-19-2011 |
20110116988 | HONEYCOMB STRUCTURAL BODY AND EXHAUST GAS CONVERTING APPARATUS - A honeycomb structural body includes a honeycomb unit having a plurality of through holes defined by cell walls and arranged in a longitudinal direction of the honeycomb unit. The honeycomb unit includes an inorganic binder, a first zeolite, and second zeolite. The first zeolite includes at least one of a β type zeolite and a ZSM-5 type zeolite, and primary particles having an average particle diameter of approximately 0.01 μm or more and approximately 0.1 μm or less. The second zeolite includes a phosphate group zeolite and primary particles having an average particle diameter of approximately 0.5 μm or more and approximately 5 μm or less. A ratio between a mass of the first zeolite and a total mass of the first and second zeolites is approximately 0.1 or more and approximately 0.5 or less. | 05-19-2011 |
20110118106 | HONEYCOMB STRUCTURE - A honeycomb structure includes a honeycomb unit. The honeycomb unit includes plural cells, inorganic particles, and at least one of a flake substance, a tetrapod-shaped substance, and a three-dimensional needle-shaped substance. The plural cells extend from a first end face to a second end face of the honeycomb structure along a longitudinal direction of the honeycomb structure. The plural cells are defined by cell walls. | 05-19-2011 |
20120058018 | SILICO-ALUMINO PHOSPHATE, HONEYCOMB STRUCTURAL BODY AND EXHAUST GAS CONVERSION APPARATUS - A silico-alumino phosphate includes Si, Al, and P. A ratio of an amount of substance of Si to a sum of an amount of substance of Al and an amount of substance of P is approximately 0.22 or more and approximately 0.33 or less. An acid point is approximately 1.2 mmol/g or more. A honeycomb structural body includes a honeycomb unit. The honeycomb unit includes the silico-alumino phosphate and an inorganic binder. The honeycomb unit has a plurality of through-holes divided by a plurality of partition walls and arranged in a longitudinal direction of the honeycomb unit. An exhaust gas conversion apparatus includes the honeycomb structural body, a holding sealing member and a metal pipe. The holding sealing member is provided at an outer peripheral portion of the honeycomb structural body. The honeycomb structural body and the holding sealing member are installed in the metal pipe. | 03-08-2012 |
20120186211 | HONEYCOMB FILTER FOR PURIFYING EXHAUST GASES, ADHESIVE, COATING MATERIAL, AND MANUFACTURING METHOD OF HONEYCOMB FILTER FOR PURIFYING EXHAUST GASES - A honeycomb filter includes a ceramic laminated body including columnar porous ceramic members and an adhesive layer combining the columnar porous ceramic members with one another. The columnar porous ceramic members each have a partition wall and through holes, the through holes extend in parallel with one another in a length direction of the columnar porous ceramic members, the partition wall separates the through holes and filters particulates in an exhaust gas, and the adhesive layer includes an inorganic binder, an inorganic fiber, inorganic particles and an inorganic balloon. | 07-26-2012 |
20120251400 | HONEYCOMB STRUCTURAL BODY AND EXHAUST GAS CONVERSION APPARATUS - A honeycomb structural body includes at least one honeycomb unit including a β type zeolite, a phosphate group zeolite, and an inorganic binder and having a plurality of through holes divided by partition walls and arranged in a longitudinal direction of the honeycomb unit. The β type zeolite includes secondary particles having an average particle diameter of approximately 0.5 μm or more and approximately 5 μm or less. The phosphate group zeolite includes primary particles having an average particle diameter of approximately 0.5 μm or more and approximately 5 μm or less. A ratio of a mass of the phosphate group zeolite with respect to a total mass of the β type zeolite and the phosphate group zeolite is approximately 5% or more and approximately 35% or less. | 10-04-2012 |
20120251401 | HONEYCOMB STRUCTURE, METHOD OF MANUFACTURING HONEYCOMB STRUCTURE, AND EXHAUST GAS CONVERTER - A honeycomb structure includes a honeycomb unit having a plurality of through holes defined by partition walls along a longitudinal direction of the honeycomb unit. The honeycomb unit is manufactured by molding raw material paste by extrusion molding and thereafter by firing the molded raw material paste. The raw material paste contains zeolite obtained by ion-exchange with iron ions and an inorganic binder. A specific surface area of the zeolite is more than or equal to approximately 500 m | 10-04-2012 |
20120251419 | EXHAUST GAS CONVERSION SYSTEM AND EXHAUST GAS CONVERSION METHOD - An exhaust gas conversion system includes an oxide catalyst, a filter, a selective catalytic reduction catalyst and an ammonia supplying device. The filter has a honeycomb structural body including a honeycomb unit. The selective catalytic reduction catalyst has a honeycomb structural body including a honeycomb unit. The oxide catalyst, the filter and the selective catalytic reduction catalyst are sequentially arranged in a direction in which an exhaust gas flows. A ratio of an area of a cross section of the selective catalytic reduction catalyst perpendicular to a longitudinal direction of the selective catalytic reduction catalyst with respect to an area of a cross section of the filter perpendicular to a longitudinal direction of the filter is approximately 0.55 or more and approximately 0.90 or less. The area of the cross section of the filter is approximately 300 cm | 10-04-2012 |
20120252658 | HONEYCOMB STRUCTURE AND METHOD OF MANUFACTURING HONEYCOMB STRUCTURE - A honeycomb structure includes a honeycomb unit containing zeolite and an inorganic binder and having a plurality of cell walls to define a plurality of cells extending from a first end face to a second end face of the honeycomb unit along a longitudinal direction of the honeycomb unit. The honeycomb unit is manufactured by molding and firing raw material paste containing zeolite particles and the inorganic binder. The zeolite particles have a D50 of approximately 3.6 μm or more. An average pore size of the cell walls is more than or equal to approximately 0.10 μm and less than or equal to approximately 0.50 μm. An average particle size of the cell walls is more than or equal to approximately 3.6 μm and less than or equal to approximately 7.0 μm. | 10-04-2012 |
20140147673 | HONEYCOMB STRUCTURE, METHOD FOR MANUFACTURING THE SAME EXHAUST GAS PURIFYING APPARATUS AND SILICOALUMINOPHOSPHATE PARTICLES - An object of the invention is to provide a honeycomb structure that has excellent NOx purification performance and can suppress the breakage of a honeycomb unit due to the adsorption or desorption of water, a method for manufacturing the honeycomb structure, and an exhaust gas purifying apparatus including the honeycomb structure. In addition, the honeycomb structure of the invention includes a honeycomb unit provided with a plurality of through holes arrayed in a longitudinal direction with a partition wall therebetween, in which the honeycomb unit is produced by extruding and firing raw material paste containing silicoaluminophosphate particles and an inorganic binder, and the silicoaluminophosphate particles have a ratio of an amount of Si to a sum of amounts of Al and P in a range of 0.16 to 0.33, a specific surface area in a range of 200 m | 05-29-2014 |
20140171292 | HONEYCOMB STRUCTURE - A honeycomb structure includes at least one honeycomb unit having a plurality of through holes defined by partition walls extending along a longitudinal direction of the honeycomb unit. The honeycomb unit includes zeolite, an inorganic binder, and a noble metal catalyst. The zeolite is ion-exchanged with Cu and/or Fe to reduce NO | 06-19-2014 |
20150087499 | HONEYCOMB STRUCTURE - A honeycomb structure includes a honeycomb unit. The honeycomb unit has a plurality of through holes defined by partition walls along a longitudinal direction of the honeycomb unit. The partition walls have a thickness of approximately 0.1 mm to approximately 0.4 mm. The honeycomb unit is manufactured by molding raw material paste by extrusion molding and thereafter by firing the molded raw material paste. The raw material paste contains zeolite and an inorganic binder. A specific surface area of the zeolite is more than or equal to approximately 500 m | 03-26-2015 |