US 12,305,551 B2
Filter and method for manufacturing same
Yukio Miyairi, Nagoya (JP); Koji Fukuyo, Nagoya (JP); Tasuku Matsumoto, Kasugai (JP); Shuichi Ichikawa, Nagoya (JP); Suguru Kodama, Nagoya (JP); Ryuta Kono, Nagoya (JP); Narimasa Shinoda, Ichinomiya (JP); and Rui Horimoto, Ichinomiya (JP)
Assigned to NGK INSULATORS, LTD., Nagoya (JP)
Filed by NGK INSULATORS, LTD., Nagoya (JP)
Filed on Jun. 1, 2020, as Appl. No. 16/889,076.
Claims priority of application No. 2019-104854 (JP), filed on Jun. 4, 2019; and application No. 2020-066203 (JP), filed on Apr. 1, 2020.
Prior Publication US 2020/0386134 A1, Dec. 10, 2020
Int. Cl. B01D 46/24 (2006.01); C04B 35/565 (2006.01); F01N 3/022 (2006.01); F01N 3/20 (2006.01); C04B 111/00 (2006.01)
CPC F01N 3/0222 (2013.01) [B01D 46/2429 (2013.01); B01D 46/24491 (2021.08); B01D 46/24492 (2021.08); B01D 46/2474 (2013.01); B01D 46/2476 (2021.08); B01D 46/2478 (2021.08); B01D 46/2482 (2021.08); C04B 35/565 (2013.01); F01N 3/2066 (2013.01); C04B 2111/00793 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A filter comprising a plurality of pillar-shaped honeycomb structure segments made of porous ceramics, side faces of the segments being bonded together via a bonding material, wherein
each of the pillar-shaped honeycomb structure segments comprises an outer peripheral side wall, and partition walls partitioning a plurality of cells extending from a first end face to a second end face, and
in each of the pillar-shaped honeycomb structure segments, an average porosity of the outer peripheral side wall is lower than that of the partition walls, and the outer peripheral side wall is such that an average porosity of a region having a thickness of 20% or more of the outer peripheral side wall inward from an outermost peripheral portion of the outer peripheral side wall is 25% or less of that of the partition walls.