Title:
ハニカムフィルタ及びその製造方法
Document Type and Number:
Japanese Patent JP5597153
Kind Code:
B2
Abstract:
There is disclosed a honeycomb filter which can suppress the increases of an initial pressure loss and a pressure loss when a particulate matter is deposited. There is provided a honeycomb filter including: a honeycomb base material including a porous partition wall parent material to partition and form a plurality of cells which become through channels of a fluid; plugged portions arranged in open frontal areas of predetermined cells in an end surface on an inflow side of the fluid and open frontal areas of the remaining cells in an end surface on an outflow side of the fluid; and a porous collecting layer disposed on the surface of the partition wall parent material in at least the remaining cells. The collecting layer has a constitution in which a plurality of particles combine or intertwine with one another, and the collecting layer includes flat plate-like particles as the plurality of particles. The plurality of particles are particles in which an average long diameter is 0.2 µm or larger and smaller than 10 µm, an average value of ratios (long diameters/short diameters) of the long diameters to the short diameters of the respective particles is smaller than 3, and an average value of ratios (the long diameters/thicknesses) of the long diameters to thicknesses of the respective particles is 3 or larger. An open area ratio of the surface of the collecting layer is 10% or larger.
Inventors:
Yoshinori Isoda
Yoshiro Kikuchi
Yoshiro Kikuchi
Application Number:
JP2011065774A
Publication Date:
October 01, 2014
Filing Date:
March 24, 2011
Export Citation:
Assignee:
NGK Insulators, Ltd.
International Classes:
B01D39/20; B01D46/00; B01D69/04; B01D69/10; B01D71/02; C04B38/00; F01N3/022
Attorney, Agent or Firm:
Ippei Watanabe
Koji Kikawa
Hiroyuki Sato
Shigeru Koike
Koji Kikawa
Hiroyuki Sato
Shigeru Koike