公开(公告)号：US20210299604A1

公开(公告)日：2021-09-30

申请号：US17168515

申请日：2021-02-05

Applicant: NGK INSULATORS, LTD.

Inventor： Takayuki KANETAKE ,  Shingo TOKUDA ,  Shuji UEDA

IPC: B01D46/24 ,  B01D39/20 ,  F01N3/022

Abstract: A ceramic filter having a pillar-shaped honeycomb structure, wherein when observing a plurality of pores from a surface of partition walls with a laser microscope and plotting an equivalent circle diameter (μm) of each pore on an X-axis and a pore depth (μm) of each pore on a Y-axis on a two-dimensional coordinate system, a slope of a regression line (y/x) obtained by a least squares method in a range of 20≤x≤40 is 0 to 0.20, an average value of the pore depth of the plurality of pores is 2.5 μm to 5.0 μm, and a number density of the plurality of pores is 600/mm2 to 2450/mm2.

公开(公告)号：US20210268422A1

公开(公告)日：2021-09-02

申请号：US17148896

申请日：2021-01-14

Applicant: NGK Insulators, Ltd.

Inventor： Koichi SENDO ,  Yu TORII ,  Shuji UEDA ,  Shungo NAGAI

IPC: B01D46/24

Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed, surrounding a plurality of cells which serve as fluid through channels extending from a first end face to a second end face; and a plugging portion provided at an open end on the first end face side or the second end face side of each of the cells, wherein the partition wall is composed of a material containing cordierite as a main component thereof, an average pore diameter of the partition wall is 20 to 30 μm, an average equivalent circle diameter of pores existing at a surface of the partition wall and having equivalent circle diameters exceeding 3.0 μm is 18 to 30 μm, and a number per unit area of pores existing at a surface of the partition wall and having equivalent circle diameters exceeding 3.0 μm is 400 per mm2 or more.

公开(公告)号：US20160288113A1

公开(公告)日：2016-10-06

申请号：US15080907

申请日：2016-03-25

Applicant: NGK INSULATORS, LTD.

Inventor： Shogo HIROSE ,  Hirotaka YAMAMOTO ,  Shiori NAKAO ,  Shuji UEDA ,  Mitsuharu ONO ,  Satoshi SAKASHITA ,  Hiroyuki NAGAOKA

IPC: B01J35/04 ,  B01J37/00 ,  B01J37/08 ,  B01J37/04

CPC classification number: B01J35/04 ,  B01D53/9418 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/20 ,  B01D2255/2065 ,  B01D2255/20715 ,  B01D2255/20723 ,  B01D2255/30 ,  B01D2255/50 ,  B01D2255/9205 ,  B01J35/10 ,  B01J37/0018 ,  B01J37/0246 ,  B32B3/12 ,  B32B37/146 ,  B32B2305/024 ,  C04B35/195 ,  C04B35/6263 ,  C04B35/63424 ,  C04B38/0009 ,  C04B2111/0081 ,  C04B2235/3217 ,  C04B2235/3218 ,  C04B2235/3244 ,  C04B2235/3418 ,  C04B2235/349 ,  C04B2235/5436 ,  C04B2235/606 ,  C04B2235/6567 ,  C04B35/185 ,  C04B35/447 ,  C04B35/46 ,  C04B35/478 ,  C04B35/48 ,  C04B35/565 ,  C04B35/584 ,  C04B35/597 ,  C04B38/0054 ,  C04B38/0074

Abstract: A honeycomb structural body 20 comprises a porous partition portion 22 which forms a plurality of cells each functioning as a flow path of a fluid, and in the partition portion 22, the average pore diameter is 10 to 20 μm, and a wet area rate R (=S/V) which is the rate of a wet area S of pores to a volume V of the partition portion 22 is 0.000239 μm−1 or more.

Abstract translation: 蜂窝结构体20包括形成多个细胞的多孔分隔部22，每个细胞均充当流体的流动路径，在分隔部22中，平均孔径为10〜20μm，湿面积率R 作为分隔部22的体积V的孔的湿润面积S的比率（= S / V）为0.000239μm-1以上。

公开(公告)号：US20160280605A1

公开(公告)日：2016-09-29

申请号：US15072764

申请日：2016-03-17

Applicant: NGK INSULATORS, LTD.

Inventor： Mitsuharu ONO ,  Shuji UEDA

IPC: C04B35/195 ,  B01J35/04 ,  B01D46/24 ,  B01J37/08 ,  F01N3/022 ,  C04B35/64 ,  B01J37/00

CPC classification number: C04B35/195 ,  B01D46/2425 ,  B01D46/2429 ,  B01J35/04 ,  B01J37/0009 ,  B01J37/08 ,  C04B35/64 ,  C04B38/0006 ,  C04B2111/00793 ,  C04B2111/0081 ,  C04B2111/325 ,  C04B2235/3217 ,  C04B2235/3418 ,  C04B2235/349 ,  C04B2235/96 ,  C04B2235/9607 ,  F01N3/0222 ,  C04B38/0054 ,  C04B38/0074

Abstract: A honeycomb structure includes a cordierite component, and has partition walls defining a plurality of cells which extend from one end face to the other end face and form through channels for a fluid, a thermal expansion coefficient in a central axis direction is 12 ppm/K or more and 3.5 ppm/K or less in a temperature change of 40° C. to 800° C., and a thermal expansion coefficient in a cross-sectional direction orthogonal to the central axis direction is 0.8 ppm/K or more and 2.5 ppm/K or less in the temperature range of 40° C. to 800° C.

Abstract translation: 蜂窝结构体包括堇青石部件，并且具有限定从一个端面延伸到另一端面的多个单元的分隔壁，并形成用于流体的通道，中心轴方向的热膨胀系数为12ppm / K 在40℃〜800℃的温度变化下为3.5ppm / K以下，与中心轴方向正交的截面方向的热膨胀系数为0.8ppm / K以上且2.5以下 在40℃〜800℃的温度范围内，ppm / K以下

公开(公告)号：US20150273436A1

公开(公告)日：2015-10-01

申请号：US14660066

申请日：2015-03-17

Applicant: NGK Insulators, Ltd.

Inventor： Mitsuharu ONO ,  Fumiharu SATO ,  Shuji UEDA ,  Hiroyuki SUENOBU

IPC: B01J21/16 ,  B01J23/30 ,  F01N3/022 ,  B01J35/00 ,  B01D53/94 ,  B01D46/24 ,  B01J35/04 ,  B01J21/12

CPC classification number: B01J21/16 ,  B01D46/2418 ,  B01D53/945 ,  B01D2255/20707 ,  B01D2255/20723 ,  B01D2255/20776 ,  B01D2255/2092 ,  B01D2255/30 ,  B01J21/12 ,  B01J23/30 ,  B01J35/0006 ,  B01J35/04 ,  C03C3/087 ,  C03C3/091 ,  C03C14/004 ,  C04B35/14 ,  C04B35/62665 ,  C04B35/6316 ,  C04B38/0006 ,  C04B38/0074 ,  C04B38/0096 ,  C04B38/067 ,  C04B2111/00793 ,  C04B2111/0081 ,  C04B2235/3201 ,  C04B2235/3418 ,  C04B2235/349 ,  C04B2235/36 ,  C04B2235/5436 ,  C04B2235/9607 ,  F01N3/0222 ,  Y10T428/24149 ,  C04B38/068

Abstract: There is disclosed a honeycomb structure. A honeycomb structure includes a pillar-shaped honeycomb structure body having partition walls defining a plurality of cells which become through channels for a fluid and extend from a first end face to a second end face, the partition walls are constituted of a porous body having aggregates and a bonding material to bond the aggregates to one another in a state where pores are formed among the aggregates, the aggregates include molten silica particles, the bonding material includes glass, a content ratio of SiO2 in the porous body is 70 mass % or more, and a thermal expansion coefficient of the porous body at 40 to 800° C. is from 1.5 to 6.0×10−6/° C.