Abstract: The honeycomb filter of the present invention comprises a ceramic honeycomb substrate formed from a porous body of sintered ceramic particles, and a filter layer formed on the surface of the cell walls, wherein a portion of the filter layer penetrates from the surface of the cell walls into pores formed by the ceramic particles to form inter-particle filtration bodies, these inter-particle filtration bodies are formed from a plurality of spherical ceramic particles and crosslinking bodies which bind the spherical ceramic particles to each other, and the spherical ceramic particles and the crosslinking bodies form a three-dimensional network structure.

Abstract: A honeycomb filter includes a ceramic honeycomb substrate, an auxiliary filter layer, an SCR catalyst, and a portion. The ceramic honeycomb substrate has cell walls provided along a longitudinal direction of the ceramic honeycomb substrate to define cells through which fluid is to pass and which have a fluid inlet end and a fluid outlet end opposite to the fluid inlet end along the longitudinal direction. The cells include first cells and second cells. The auxiliary filter layer is provided on first surfaces of first cell walls of the first cells. The SCR catalyst is supported on second surfaces of second cell walls of the second cells. The second surfaces substantially correspond to the first surfaces. The portion satisfies a<b. “a” (?m) represents an average pore diameter of pores of the auxiliary filter layer, and “b” (?m) represents an average particle diameter of particles constituting the SCR catalyst.

Abstract: The honeycomb filter of the present invention comprises a ceramic honeycomb substrate formed from a porous body of sintered ceramic particles, and a filter layer formed on the surface of the cell walls, wherein a portion of the filter layer penetrates from the surface of the cell walls into pores formed by the ceramic particles to form inter-particle filtration bodies, these inter-particle filtration bodies are formed from a plurality of spherical ceramic particles and crosslinking bodies which bind the spherical ceramic particles to each other, and the spherical ceramic particles and the crosslinking bodies form a three-dimensional network structure.

Abstract: A honeycomb filter includes a ceramic honeycomb substrate, an auxiliary filter layer, an SCR catalyst, and a portion. The ceramic honeycomb substrate has cell walls provided along a longitudinal direction of the ceramic honeycomb substrate to define cells through which fluid is to pass and which have a fluid inlet end and a fluid outlet end opposite to the fluid inlet end along the longitudinal direction. The cells include first cells and second cells. The auxiliary filter layer is provided on first surfaces of first cell walls of the first cells. The SCR catalyst is supported on second surfaces of second cell walls of the second cells. The second surfaces substantially correspond to the first surfaces. The portion satisfies a<b. “a” (?m) represents an average pore diameter of pores of the auxiliary filter layer, and “b” (?m) represents an average particle diameter of particles constituting the SCR catalyst.

Abstract: A honeycomb filter includes a ceramic honeycomb substrate and an auxiliary filter layer. The ceramic honeycomb substrate includes a porous honeycomb fired body having cell walls provided along a longitudinal direction of the porous honeycomb fired body to define cells through which fluid is to pass and which have a fluid inlet end and a fluid outlet end opposite to the fluid inlet end along the longitudinal direction. The cells include first cells including an inlet opening end at the fluid inlet end and an outlet closed end at the fluid outlet end. The auxiliary filter layer is provided on a surface of first cell walls of the first cells and on a pore portion in the first cell walls, and includes a first layer and a second layer. In the first layer, particles having a first average particle diameter are deposited on the surface of the first cell walls.