Abstract: A honeycomb filter includes a honeycomb fired body made of silicon carbide particles. The honeycomb fired body includes cell walls, a peripheral wall, and a silicon-containing oxide layer. The cell walls are to define cells placed in a longitudinal direction of the honeycomb fired body. The cell walls have a thickness of about 0.2 mm or less. Each of the cells has a first end portion and a second end portion opposite to the first end portion in the longitudinal direction. Either the first end portion or the second end portion of the each of the cells is sealed. The peripheral wall constitutes a periphery of the honeycomb fired body. The peripheral wall has a thickness larger than the thickness of the cell walls. The silicon-containing oxide layer is provided on surfaces of the silicon carbide particles.

Abstract: A honeycomb structured body of the present invention comprises a plurality of cells placed in parallel with one another in a longitudinal direction with a cell wall therebetween, wherein an oxide catalyst is supported on at least one portion of the cell wall, and the honeycomb structured body has an apparent density of about 0.7 g/cm3 or less.

Abstract: 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 ?m and at most about 1.00 ?m.

Abstract: A catalyst supporting honeycomb includes a pillar-shaped honeycomb structure and catalyst particles supported on the honeycomb structure. The honeycomb structure includes cell walls extending in a longitudinal direction of the honeycomb structure to define a plurality of cells extending in the longitudinal direction. The plurality of cells include large-volume cells having first opening ends and second closing ends opposite to the first opening ends along the longitudinal direction, and small-volume cells having first closed ends and second opening ends opposite to the first closed ends along the longitudinal direction. Total cross sectional areas of the large-volume cells on a plane perpendicular to the longitudinal direction are larger than total cross sectional areas of the small-volume cells on the plane. The catalyst particles include an oxide catalyst having an average particle diameter of at least about 0.05 ?m and at most about 1.00 ?m.

Abstract: A pillar-shaped honeycomb structure has a plurality of cells longitudinally placed in parallel with one another with a wall portion therebetween, wherein the honeycomb structure mainly includes inorganic fibers which form the honeycomb structure without lamination interfaces.

Abstract: A honeycomb filter includes a honeycomb structure in which a plurality of cells are placed in parallel with one another in the longitudinal direction with a cell wall therebetween; and a cylindrical metal casing that covers the outer peripheral side face of the honeycomb structure. A shortest distance between the outermost cells among the plurality of cells and the inner face of the metal casing is at least about 1 mm and at most about 3 mm.

Abstract: A honeycomb structure is a pillar-shaped honeycomb structure in which a plurality of cells, separated from each other by a cell wall, are formed in a longitudinal direction. When the honeycomb structure is divided into two portions by a plane in parallel with either one of end faces in the longitudinal direction of the honeycomb structure so that apparent volumes of the respective two portions become equal to each other, the respective two portions have apparent densities different from each other.

Abstract: A honeycomb filter includes a honeycomb body including first and second cells extending along its longitudinal direction. The first cells have upstream opening ends and downstream closing ends opposite to the upstream opening ends along the longitudinal direction. The second cells have upstream closed ends and downstream opening ends opposite to the upstream closed ends along the longitudinal direction. The honeycomb body further includes cell walls intervening between the first cells and the second cells to define the first cells and second cells and extending between the upstream opening ends and the downstream closing ends and between the upstream closed ends and the downstream opening ends. A porosity of the cell walls is about 75% to about 95%. Ceramic particles are provided in the cell wall. A concentration of the ceramic particles in the wall decreases from the first cells to the second cells.

Abstract: 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 ?m and at most about 1.00 ?m.

Abstract: A catalyst supporting honeycomb includes a pillar-shaped honeycomb structure and catalyst particles supported on the honeycomb structure. The honeycomb structure includes cell walls extending in a longitudinal direction of the honeycomb structure to define a plurality of cells extending in the longitudinal direction. The plurality of cells include large-volume cells having first opening ends and second closing ends opposite to the first opening ends along the longitudinal direction, and small-volume cells having first closed ends and second opening ends opposite to the first closed ends along the longitudinal direction. Total cross sectional areas of the large-volume cells on a plane perpendicular to the longitudinal direction are larger than total cross sectional areas of the small-volume cells on the plane. The catalyst particles include an oxide catalyst having an average particle diameter of at least about 0.05 ?m and at most about 1.00 ?m.

Abstract: A pillar-shaped honeycomb structure has a plurality of cells longitudinally placed in parallel with one another with a wall portion therebetween, wherein the honeycomb structure mainly includes inorganic fibers which form the honeycomb structure without lamination interfaces.

Abstract: A pillar-shaped honeycomb structure having a plurality of cells formed by laminating a plurality of lamination members with a plurality of through holes. The plurality of through holes form the plurality of cells. The lamination members are a substantially disc shaped. A plane portion, a protruding portion, or a cut-out portion is formed on a peripheral side face of the lamination member, or a rod member is inserted in at least one cell of the plurality of cells, where the rod member penetrates from one end to the other end of the cell.

Abstract: A honeycomb filter includes a honeycomb structure in which a plurality of cells are placed in parallel with one another in the longitudinal direction with a cell wall therebetween; and a cylindrical metal casing that covers the outer peripheral side face of the honeycomb structure. A shortest distance between the outermost cells among the plurality of cells and the inner face of the metal casing is at least about 1 mm and at most about 3 mm.

Abstract: An additive for engine oil of the present invention comprises: a compound containing a metallic element, wherein a metal oxide obtained by oxidizing the metallic element has a catalytic action which promotes burning of a particulate matter contained in exhaust gases discharged from an internal combustion engine.

Abstract: A honeycomb structured body of the present invention comprises a plurality of cells placed in parallel with one another in a longitudinal direction with a cell wall therebetween, wherein an oxide catalyst is supported on at least one portion of the cell wall, and the honeycomb structured body has an apparent density of about 0.7 g/cm3 or less.