公开(公告)号：US20230311112A1

公开(公告)日：2023-10-05

申请号：US18180950

申请日：2023-03-09

Applicant: NGK Insulators, Ltd.

Inventor： Shuji MURAMATSU ,  Yasuhiro SHIGA

IPC: B01J35/04 ,  B01J35/10 ,  B01J35/02 ,  B01J35/00

CPC classification number: B01J35/04 ,  B01J35/1076 ,  B01J35/023 ,  B01J35/0026

Abstract: A pillar-shaped honeycomb structure includes an outer peripheral side wall, and a plurality of partition walls partitioning a plurality of cells, wherein an average pore diameter of the partition walls measured by a mercury intrusion method specified in JIS R1655: 2003 is 3 to 10 μm, and when a cross-section of the plurality of partition walls is observed with an X-ray microscope and a porosity (%) is measured in a thickness direction from one surface to the other surface of each partition wall, assuming PAVE is an average porosity of each partition wall, P1 MIN is a minimum porosity from the one surface to a thickness of 5% of the partition wall, and P2MIN is a minimum porosity from the other surface to a thickness of 5% of the partition wall, 40% PAVE ≤70%, and {(P1 MIN+P2MIN)/2} /PAVE ≤0.9 are satisfied.

公开(公告)号：US20230311109A1

公开(公告)日：2023-10-05

申请号：US18162759

申请日：2023-02-01

Applicant: NGK Insulators, Ltd.

Inventor： Yasuhiro SHIGA ,  Shuji MURAMATSU ,  Koji MOTOKI

IPC: B01J35/04 ,  B01J21/12 ,  B01J35/10 ,  B01J35/00 ,  B01D53/94 ,  F01N3/28

CPC classification number: B01J35/04 ,  B01J21/12 ,  B01J35/1076 ,  B01J35/0026 ,  B01D53/94 ,  F01N3/2828 ,  B01D2255/9155 ,  F01N2330/32 ,  F01N2370/02

Abstract: A pillar-shaped honeycomb structure including an outer peripheral side wall, and a plurality of partition walls disposed on an inner peripheral side of the outer peripheral side wall, the plurality of partition walls partitioning a plurality of cells forming flow paths from a first end surface to a second end surface, wherein



an average pore diameter of the partition walls measured by a mercury porosimeter is 10 μm or less, and
when a cross section of the plurality of partition walls is observed with an X-ray microscope and porosities (%) of each partition wall is measured in a thickness direction from one surface to the other surface of each partition wall, an average porosity of each partition wall is 40 to 70%, and a difference between a maximum value and a minimum value of the porosity of each partition wall is 11% or less.