Ibiden Company Limited

Toyota Jidosha Kabushiki Kaisha

Misako Makino

Takafumi Kasuga

Saiduzzaman Md

Hiromasa Suzuki

Takeru Yoshida

Masaru Kakinohana

Takumi Tojo

Naoyuki Jinbo

Yuichi Nagatsu

Takeshi Ushida

Daisuke Mori

Kazuki Nakamura

The present invention provides a honeycomb structured body capable of achieving more effective use of a catalyst in partition walls and having excellent exhaust gas conversion performance. The present invention relates to a honeycomb structured body including: a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body contains ceria-zirconia composite oxide particles and alumina particles, the partition wall of the honeycomb fired body contains macropores having a pore size of 2 to 50 &#x3bc;m, and in an electron microscope image of a cross section of the partition wall, the percentage of the area occupied by pores having a pore size of 5 to 15 &#x3bc;m is at least 85% of the total area of the macropores.

Honeycomb structured body

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.

Honeycomb filter

An object of the present invention is to provide a honeycomb filter capable of achieving a combination of high collection efficiency and low pressure loss. The honeycomb filter comprises a ceramic honeycomb substrate in which a multitude of cells through which a fluid flows are disposed in parallel in a longitudinal direction and are separated by cell walls, each cell being sealed at an end section at either the fluid inlet side or the fluid outlet side, and a filter layer which, among the surfaces of the cell walls, is formed on the surface of the cell walls of those cells in which the end section at the fluid inlet side is open and the end section at the fluid outlet side is sealed by a sealing material, wherein the thickness of the filter layer increases gradually from the fluid inlet side toward the fluid outlet side.

Honeycomb filter and method for producing honeycomb filter

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&#x3c;b. 'a' (&#x3bc;m) represents an average pore diameter of pores of the auxiliary filter layer, and 'b' (&#x3bc;m) represents an average particle diameter of particles constituting the SCR catalyst.

Honeycomb filter and production method for honeycomb filter

Growing community of inventors

Ibi-gun, Japan

Misako Makino