摘要:
A honeycomb structure includes a plurality of honeycomb fired bodies combined with one another. The honeycomb fired bodies include a center-portion honeycomb fired body located in a center portion in a cross section perpendicular to a longitudinal direction and a peripheral-portion honeycomb fired body located in a peripheral portion in the cross section. The center-portion honeycomb fired body has a substantially rectangular cross-sectional shape and has an area from about 2500 mm2 to about 5000 mm2 in the cross-section. A cross-sectional shape of the peripheral-portion honeycomb fired body is different from the cross-sectional shape of the center-portion honeycomb fired body. A cross-sectional area of the peripheral-portion honeycomb fired body perpendicular to the longitudinal direction is from about 0.9 times to about 1.3 times as large as the cross-sectional area of the center-portion honeycomb fired body.
摘要:
A method of manufacturing a porous sintered body includes mixing first silicon carbide particles, second silicon carbide particles, and a pore forming material having an average particle diameter Y μm to obtain a molding material. The first silicon carbide particles have an average particle diameter X μm larger than an average particle diameter of the second silicon carbide particles. Relationships 15≦X, 0.5·X≦Z≦0.9·X, and 0.8·Z≦Y≦1.8·Z are satisfied, wherein Z μm is an average pore diameter of the porous sintered body no less than 10 μm and no greater than 20 μm. The molding material is molded into a molded body. The molded body is degreased to eliminate the pore forming material from the molded body.
摘要:
A honeycomb structured body of the present invention is a honeycomb structured body in which plural pillar-shaped honeycomb units are bonded to one another through sealing material layers, each unit having in the longitudinal direction a large number of cells placed in parallel with a cell wall therebetween. Herein, a cross-sectional area of the honeycomb unit on a cross-section perpendicular to the length direction is at least about 5 cm2 and at most about 50 cm2, the honeycomb unit includes inorganic fibers and/or whiskers in addition to inorganic particles, and a Young's modulus of the honeycomb unit is at least about 50% and at most about 150% of a Young's modulus of the sealing material layer.
摘要:
Mixed particles including noble metal particles of a noble metal, first particles of one or more metal oxides, and second particles of a metal oxide. The first particles of one or more metal oxides are selected from Al2O3, SiO2, ZrO2 and TiO2. The second particles of a metal oxide have a larger adsorptive interaction with the noble metal of the noble metal particles as compared with the metal oxide of the first particles. The noble metal particles are carried by the second particles in a larger proportion than by the first particles.
摘要:
A honeycomb filter includes an outer wall having a substantially cylindrical shape and a central axis of the substantially cylindrical shape, first walls provided at an inner side of the outer wall and extending along the central axis, and second walls provided at the inner side of the outer wall and extending along the central axis. The first walls and the second walls substantially perpendicularly cross to define cells having a substantially square shape in a cross-section perpendicular to the central axis. A thickness of the outer wall in the cross-section at a first intersection between the outer wall and a first diameter substantially parallel to the first walls in the cross-section and a thickness of the outer wall in the cross-section at a second intersection between the outer wall and a second diameter substantially parallel to the second walls in the cross-section are largest.
摘要:
A catalyst supporting honeycomb including a pillar-shaped honeycomb structure having a plurality of cells formed in parallel with one another in a longitudinal direction with a cell wall interposed therebetween, and catalyst particles supported on the honeycomb structure. The catalyst particles include an oxide catalyst, an average particle diameter of which is at least about 0.05 μm and at most about 1.00 μm.
摘要:
A catalyst carrier including a ceramic block having two open faces, an outer peripheral surface, and multiple cells divided by a cell wall and extending between the open faces. The ceramic block has multiple honeycomb units combined by interposing an adhesive layer, where the honeycomb units include an outer-peripheral-side honeycomb unit and a center-side honeycomb unit combined to form the outer peripheral part and the center part, respectively, of the block. The outer-peripheral-side honeycomb unit has an outer peripheral cell wall forming the outer peripheral surface of the outer-peripheral-side honeycomb unit. The outer peripheral cell wall includes an outermost peripheral cell wall forming part of the outer peripheral surface of the block. A cell of the outer-peripheral-side honeycomb unit in contact with the outermost peripheral cell wall thereof has a corner part having a curved surface, where the corner part is on the side contacting the outermost peripheral cell wall.
摘要:
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.
摘要:
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.