摘要:
Provided is a technique to manufacture a honeycomb structure reducing a width of dimensional difference generated during firing between an end part and a central part and having excellent thermal shock resistance, and the method includes: a honeycomb formed body preparing step of extruding a kneaded material including a cordierite forming raw material A, to prepare a formed body; a plugged honeycomb formed body preparing step of filling cell openings thereof with a plugging material which includes a forming raw material containing a cordierite forming raw material B and resin balloon of 1.0 to 15 mass % and has a difference in firing shrinkage rate of −1.0 to +2.0% from the formed body, to prepare a plugged formed body; and a honeycomb structure preparing step of firing the prepared plugged formed body, to prepare a honeycomb structure provided with porous plugged portions.
摘要:
A manufacturing method of a honeycomb structure includes a forming step of preparing a forming raw material containing a cordierite forming material and an inorganic binder, and kneading and forming the prepared forming raw material to have a honeycomb shape; and a firing step of firing the prepared formed body. In the forming step, as the inorganic binder, smectite is used in which at least parts of interlayer metal cations are ion-exchanged with non-metal cations. In the smectite, a total amount of sodium to be contained in the smectite is 1.6 mass % or less in terms of oxides to 100 mass % of the smectite. A content ratio of the smectite in the forming raw material is 0.5 parts by mass or more and 4.0 parts by mass or less to 100 parts by mass of the cordierite forming material.
摘要:
A heat/acoustic wave conversion component includes a partition wall that defines a plurality of cells, inside of the cells being filled with fluid that oscillates to transmit acoustic waves, the heat/acoustic wave conversion component mutually converting heat exchanged between the partition wall and the fluid and energy of acoustic waves resulting from oscillations of the fluid. The plurality of cells have an average of hydraulic diameters HDs that is 0.4 mm or less in a plane perpendicular to the cell extending direction, the heat/acoustic wave conversion component has an open frontal area at each end face of 60% or more and 93% or less, and distribution of hydraulic diameters HDs of the plurality of cells has relative standard deviation that is 2% or more and 30% or less.
摘要:
There is disclosed a honeycomb structure. A honeycomb structure includes a pillar-shaped honeycomb structure body having partition walls defining a plurality of cells which become through channels for a fluid and extend from a first end face to a second end face, the partition walls are constituted of a porous body having aggregates and a bonding material to bond the aggregates to one another in a state where pores are formed among the aggregates, the aggregates include molten silica particles, the bonding material includes glass, a content ratio of SiO2 in the porous body is 70 mass % or more, and a thermal expansion coefficient of the porous body at 40 to 800° C. is from 1.5 to 6.0×10−6/° C.
摘要:
The honeycomb catalyst body is equipped with a honeycomb structure body having partition walls that define a plurality of cells extending from a first end face as one of the end faces to a second end face as the other end face and serving as through channels of a fluid. The partition walls each have a base layer containing from 50 to 90 mass % of zeolite and a coat layer with which the surface of the base layer 11 is coated with a thickness of from 1 to 50 μm. The coat layer is either a coat layer (A) containing from 1 to 5 mass % vanadia and titania or a coat layer (B) containing from 1 to 5 mass % vanadia and a composite oxide of titania and tungsten oxide.
摘要:
A heat/acoustic wave conversion component includes a plurality of monolithic honeycomb segments each including a partition wall that defines a plurality of cells extending between both end faces, and the plurality of monolithic honeycomb segments each mutually converts heat exchanged between the partition wall and the working fluid in the cells and energy of acoustic waves resulting from oscillations of the working fluid. In the heat/acoustic wave conversion component including the plurality of honeycomb segments each being monolithic configured, hydraulic diameter HD of the cells is 0.4 mm or less, open frontal area of the honeycomb segments is 60% or more and 93% or less, heat conductivity of the honeycomb segments is 5 W/mK or less, and a ratio HD/L of the hydraulic diameter HD to the length L of the honeycomb segment is 0.005 or more and less than 0.02.
摘要:
The honeycomb structure includes a honeycomb structure part having porous partition walls, and porous plugged portions, and when there is drawn a straight line as an inner boundary line which is positioned at a distance of 30% of a distance between an outer end surface and an inner end surface, from the inner end surface, and there is drawn a straight line as an outer boundary line which is positioned at a distance of 70% of the distance between the outer end surface and the inner end surface, from the inner end surface, each of the plugged portions has an outer region, and an inner region which is the region between the inner end surface and the inner boundary line and whose porosity is larger than a porosity of the outer region.
摘要:
There is disclosed a honeycomb structure onto which a large amount of catalyst can be carried while suppressing an increase in pressure drop. In a honeycomb structure comprising porous partition walls by which a plurality of cells that become through channels of a fluid are partitioned and in which a plurality of pores are formed. In each of the partition walls, pores having pore diameters larger than a thickness of the partition wall in a section thereof which is perpendicular to an extending direction of the cells are formed so as to occupy 4 to 11% of the total volume of the pores formed in the partition walls.
摘要:
A honeycomb filter includes a tubular honeycomb structure having porous partition walls with which there are formed a plurality of cells extending from one end surface to the other end surface to become through channels of a fluid; and plugged portions arranged in one open end portion of each of predetermined cells and the other open end portion of each of the remaining cells, porosities of the partition walls are 46% or less, a pore volume ratio of pores having pore diameters of 40 μm or more is 7.5% or less, and a pore volume ratio of pores having pore diameters of 10 μm or less is 25% or less, a permeability of the honeycomb structure is 0.8 μm2 or more, and a coefficient of thermal expansion of the honeycomb structure in a range of 40 to 800° C. is 1.0×10−6/° C. or less.
摘要:
A plugged honeycomb structure has a plurality of cells defined by partition walls to become through channels for fluid, one end of each of the predetermined cells is plugged by a plugging member, the other end of each of the residual cells is plugged by the plugging member, the partition wall is made of a cordierite component as a main component, and a value obtained by dividing Young's modulus of a plugging structure portion formed by the partition walls and the plugging member by Young's modulus of a cell structure portion formed by the partition walls is in a range of 1.05 to 2.00.