Abstract: Partition walls are provided with small pores and large pores, a porosity of the partition walls is from 50 to 70%, a porosity of the large pores of the partition walls is 30% or larger, a ratio of a total volume of the small pores to a total volume of the large pores is 20% or larger, and in a graph showing a pore diameter distribution of the partition walls, the pore diameter at a maximum peak value of the large pores is from 20 to 200 ?m, and the pore diameter at a maximum peak value of the small pores is from 0.1 to 8 ?m. Furthermore, a value obtained by dividing a porosity value (%) of the large pores by a thickness value (?m) of the partition walls is 0.2 or larger in a honeycomb structure.

Abstract: There is provided a honeycomb catalyst carrier provided with porous partition walls containing cordierite or aluminum titanate as a main component and separating and forming a plurality of cells functioning as fluid passages. The partition walls have a porosity of 0.5% or more and 10% or less. The honeycomb catalyst carrier can be warmed up fast, and the temperature of the catalyst loaded on the honeycomb catalyst carrier can be raised faster.

Abstract: There are disclosed a honeycomb structure capable of providing a honeycomb catalytic body which is excellent in purification efficiency with a small pressure loss and which can be mounted even in a limited space, a honeycomb catalytic body which is excellent in purification efficiency with a small pressure loss and which can be mounted even in a limited space, and a manufacturing method of the same. A honeycomb catalytic body 50 of the present invention is a honeycomb catalytic body of a flow-through type through which cells as through channels extend from an inlet to an outlet, both the surfaces of partition walls 4 of a honeycomb structure 1 and the inner surfaces of pores 25 carry a catalyst to form catalyst layers 5, and the catalyst carrying partition walls have a permeability of 1×10?12 [m2] or more, preferably 1×10?9 [m2] or less.

Abstract: 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 100 comprising porous partition walls 1 by which a plurality of cells 2 that become through channels of a fluid are partitioned and in which a plurality of pores 6 are formed. In each of the partition walls 1, pores having pore diameters larger than a thickness of the partition wall 1 in a section thereof which is vertical to an extending direction of the cells 2 are formed so as to occupy 4 to 11% of the total volume of the pores 6 formed in the partition walls 1.

Abstract: A honeycomb structural body includes porous partition walls arranged to form a plurality of cells which become through channels of a fluid, porosities of the partition walls are from 45 to 70%, a pore diameter distribution of the partition walls is measured by mercury porosimetry, the pore diameter distribution indicates a bimodal distribution, in the bimodal distribution, a pore diameter at the maximum peak value of a small pore side distribution is from 1 to 10 ?m, and a pore diameter at the maximum peak value of a large pore side distribution exceeds 10 ?m, and a ratio between a pore volume of the small pores and a pore volume of the large pores is in a range of 1:7 to 1:1 in the honeycomb structural body.

Abstract: A zeolite structure which has partition walls composed of a zeolite ion-exchanged with a metal ion and forming a plurality of cells extending from one end face of the zeolite structure to its other end face and functioning as a passage of fluid and which has a honeycomb shape, wherein the content per unit zeolite amount of the metal ion in the surface portion of the partition wall is larger than the content per unit zeolite amount of the metal ion in the inner portion of the partition wall and is preferably 1.1 to 5.0 times the content per unit zeolite amount of the metal ion in the inner portion of the partition wall.

Abstract: There is disclosed a ceramic honeycomb structure which is not easily damaged and is excellent in durability even in a case where irregular canning conditions such as an overload and an offset load are generated. The ceramic honeycomb structure has a cell tilt angle of 0.5° or more and 35° or less and a substantially elliptic or oblong sectional shape vertical to a central axis direction.

Abstract: There is provided a honeycomb structure usable in a filter for trapping/collecting particulates included in exhaust gas and in which ashes deposited inside can be removed without requiring any special mechanism or apparatus or without detaching the filter from an exhaust system. The honeycomb structure includes: a plurality of through channels 9 separated by porous partition walls 7 and extending in the axial direction of the honeycomb structure; and plugging portions 11 for plugging one end of each of predetermined through channels 9a and an opposite end of each of the rest of through channels 9b in a checkered flag pattern, alternately. In the honeycomb structure, at least one slit 15 per through channel is formed in the vicinity of the plugging portions 11 of the partition walls 7 surrounding the respective through channels 9b.

Abstract: There are disclosed a honeycomb structure capable of providing a honeycomb catalytic body which is excellent in purification efficiency with a small pressure loss and which can be mounted even in a limited space, a honeycomb catalytic body which is excellent in purification efficiency with a small pressure loss and which can be mounted even in a limited space, and a manufacturing method of the same. A honeycomb catalytic body 50 of the present invention is a honeycomb catalytic body of a flow-through type through which cells as through channels extend from an inlet to an outlet, both the surfaces of partition walls 4 of a honeycomb structure 1 and the inner surfaces of pores 25 carry a catalyst to form catalyst layers 5, and the catalyst carrying partition walls have a permeability of 1×10?12 [m2] or more, preferably 1×10?9 [m2] or less.

Abstract: There is provided a honeycomb structure usable in a filter for trapping/collecting particulates included in exhaust gas and in which ashes deposited inside can be removed without requiring any special mechanism or apparatus or without detaching the filter from an exhaust system. The honeycomb structure includes: a plurality of through channels 9 separated by porous partition walls 7 and extending in the axial direction of the honeycomb structure; and plugging portions 11 for plugging one end of each of predetermined through channels 9a and an opposite end of each of the rest of through channels 9b in a checkered flag pattern, alternately. In the honeycomb structure, at least one slit 15 per through channel is formed in the vicinity of the plugging portions 11 of the partition walls 7 surrounding the respective through channels 9b.