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公开(公告)号：US20200306680A1
公开(公告)日：2020-10-01
申请号：US16815619
申请日：2020-03-11
Applicant: NGK Insulators, Ltd.
Inventor： Kimiko KISHINE , Fumihiko YOSHIOKA
IPC: B01D46/24
Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls placed, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face; and porous plugging portions provided either at the ends on the inflow end face side of the cells or at the ends on the outflow end face side of the cells, wherein the plugging portions include plugging portions that have voids therein, and in the plugging portions having the voids, porosity including the voids as pores ranges from 68% to 83%.
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公开(公告)号：US20190301327A1
公开(公告)日：2019-10-03
申请号：US16356268
申请日：2019-03-18
Applicant: NGK Insulators, Ltd. , Honda Motor Co., Ltd.
Inventor： Fumihiko YOSHIOKA , Yoshiaki HATEKAYAMA , Noritaka MASUMITSU
Abstract: A honeycomb filter, including: a honeycomb structure, wherein the honeycomb structure further includes a platinum group element-containing catalyst layer, the platinum group element-containing catalyst layer is disposed only on a side of an inner surface of the partition walls surrounding the inflow cells, and the platinum group element-containing catalyst layer is disposed in a range of at least up to 35% with respect to an overall length of the cells starting from the inflow end face and is not disposed in a range of at least up to 30% with respect to the overall length of the cells starting from the outflow end face, in an extending direction of the cells of the honeycomb structure.
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公开(公告)号：US20170274312A1
公开(公告)日：2017-09-28
申请号：US15455428
申请日：2017-03-10
Applicant: NGK INSULATORS, LTD.
Inventor： Fumihiko YOSHIOKA , Kazuto MIURA
Abstract: A honeycomb filter includes a pillar-shaped honeycomb substrate including a porous partition wall that defines a plurality of cells extending from an inflow end face to an outflow end face, an inflow side plugging portion disposed at the inflow end face of the honeycomb substrate to plug open ends of outflow cells and an outflow side plugging portion disposed at the outflow end face of the honeycomb substrate to plug open ends of inflow cells other than the outflow cells. The honeycomb substrate includes the partition wall that defines two of the inflow cells by division. An average of the plugging length LIN of the inflow side plugging portions disposed in the outflow cells of the honeycomb substrate is larger than an average of the plugging length LOUT of the outflow side plugging portions disposed in the inflow cells of the honeycomb substrate.
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公开(公告)号：US20230356131A1
公开(公告)日：2023-11-09
申请号：US18068741
申请日：2022-12-20
Applicant: NGK Insulators, Ltd.
Inventor： Yudai KURIMOTO , Fumihiko YOSHIOKA
CPC classification number: B01D46/2429 , B01D46/24491 , B01D46/24492 , B01D46/2474 , B01D46/2482 , B01D46/2484 , B01D46/249 , B01D46/2498 , C04B38/0009 , C04B38/0012 , B01D2279/30
Abstract: A honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall and a plugging portion, wherein a thickness of the partition wall is 0.257 mm or less, a porosity of the partition wall is 52 to 57%, an average pore diameter of the partition wall is 6 to 13 µm, a number per unit area of pores which exist at a surface of the partition wall and which have equivalent circle opening diameters exceeding 3 µm is 800 to 1500 /mm2, an average equivalent circle opening diameter of pores which exist at a surface of the partition wall and which have equivalent circle opening diameters exceeding 3 µm is 8.0 to 12.0 µm, and in a pore diameter distribution of the partition wall,
D10 is 2.0 to 5.5 µm,
D90 is 13.0 to 25.5 µm, and
(Log(D90)-Log(D10))/Log(D50) is 0.84 or less.-
公开(公告)号：US20230347274A1
公开(公告)日：2023-11-02
申请号：US18173938
申请日：2023-02-24
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA , Yudai KURIMOTO
IPC: B01D46/24
CPC classification number: B01D46/2429 , B01D46/2444 , B01D46/24491 , B01D46/24494 , B01D46/2482 , B01D46/2484 , B01D2257/404
Abstract: A honeycomb filter includes: a honeycomb substrate having porous partition walls disposed so as to surround cells extending from an inflow end face to an outflow end face, an outer peripheral coating layer disposed so as to surround an outer periphery of the honeycomb substrate, and plugging portions that are disposed at any one of ends on the inflow end face and ends on the outflow end face, of the cells, wherein, the outer peripheral coating layer has an inflection point at which thermal expansion in thermal expansion behavior of the outer peripheral coating layer turns to contraction and a temperature T1 of which is 1000 to 1500° C., and the outer peripheral coating layer has a porosity P1 of 36 to 48%, and a thermal expansion coefficient C1 between 40 to 800° C. of 2.5 to 3.5×10-6 /°C.
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Patent Agency Ranking
公开(公告)号：US20230338885A1
公开(公告)日：2023-10-26
申请号：US18177248
申请日：2023-03-02
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA , Yudai KURIMOTO , Yasuyuki FURUTA , Ritsuko TERANISHI , Ayaka SAKAI , Tatsuya OHASHI
IPC: B01D46/24
CPC classification number: B01D46/2498 , B01D46/2429 , B01D46/24491 , B01D46/247 , B01D46/2474 , B01D46/2482 , B01D46/2484 , B01D46/249 , B01D46/2494 , B01D2279/30
Abstract: A honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall and a plugging portion, wherein, in a pore diameter distribution of the partition wall, in the case where the pore diameter (µm) whose cumulative pore volume is 10% of the total pore volume is denoted by D10, the pore diameter (µm) whose cumulative pore volume is 50% of the total pore volume is denoted by D50, and the pore diameter (µm) whose cumulative pore volume is 90% of the total pore volume is denoted by D90, all of the following equations (1) to (6) are satisfied.
3.9
μ
m-
公开(公告)号：US20200306738A1
公开(公告)日：2020-10-01
申请号：US16815488
申请日：2020-03-11
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA
Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and a porous plugging portion provided either at an end on the inflow end face or the outflow end face of the cells, wherein the plugging portion is composed of a porous material, the honeycomb structure has a central region and a circumferential region, and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, porosity of a central plugging portion in the central region is lower than that of a circumferential plugging portion in the circumferential region, and the porosity of the central plugging portions ranges from 60% to 68%, and that of the circumferential plugging portions ranges from 70% to 85%.
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公开(公告)号：US20190301326A1
公开(公告)日：2019-10-03
申请号：US16356239
申请日：2019-03-18
Applicant: NGK Insulators, Ltd. , Honda Motor Co., Ltd.
Inventor： Fumihiko YOSHIOKA , Yoshiaki HATEKAYAMA , Noritaka MASUMITSU
Abstract: A honeycomb filter, including: a honeycomb structure, wherein the honeycomb structure includes a platinum group element-containing catalyst layer, the platinum group element-containing catalyst layer is disposed only on a side of an inner surface of the partition walls surrounding the outflow cells, and the platinum group element-containing catalyst layer is disposed in a range of at least up to 35% with respect to an overall length of the cells starting from the outflow end face and is not disposed in a range of at least up to 30% with respect to the overall length of the cells starting from the inflow end face, in an extending direction of the cells of the honeycomb structure.
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公开(公告)号：US20230311049A1
公开(公告)日：2023-10-05
申请号：US18165494
申请日：2023-02-07
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA , Yudai KURIMOTO
IPC: B01D46/24
CPC classification number: B01D46/2484 , B01D46/2494 , B01D46/2459 , B01D46/2482 , B01D46/2474 , B01D46/249 , B01D46/24491 , B01D2279/30
Abstract: A honeycomb filter includes a honeycomb structure body that has porous partition walls disposed so as to surround cells, and plugging portions that are disposed at any one of the ends on the inflow end face and the ends on the outflow end face. A cross-sectional shape of each of the inflow cells is octagonal and a cross-sectional shape of each of the outflow cells is quadrangular. An area ratio (S1/S2) of a cross-sectional area S2 of each of the outflow cells to a cross-sectional area S1 of each of the inflow cells is 1.40 to 2.20. The plugging portions have convex portions that protrude from the end faces on which the plugging portions are disposed, toward the outer sides, and have a protruding height H of 0.3 to 3.0 mm, and the plugging portions have a plugging depth L of 4.0 to 9.0 mm.
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公开(公告)号：US20220305420A1
公开(公告)日：2022-09-29
申请号：US17457332
申请日：2021-12-02
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA , Yudai KURIMOTO
IPC: B01D46/24
Abstract: A honeycomb filter includes a honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion disposed at one end of the cells, wherein the plurality of cells are arranged in a square grid pattern along a first direction and a second direction in a section orthogonal to an extending direction of the cells, the shape in the section is a deformed square having a specific corner, the specific corner includes a first curved portion, a second curved portion, and a connecting portion, a radius of curvature R1 of the first curved portion and a radius of curvature R2 of the second curved portion are 40 to 80 μm, respectively, and a center distance between a center of curvature O1 of the first curved portion and a center of curvature O2 of the second curved portion is 80 to 200 μm.
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