Patents Assigned to NGK Insulators
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Patent number: 10442736Abstract: There is provided a platy Mg-containing zinc oxide sintered compact containing 1 to 10 wt % Mg as a first dopant element and 0.005 wt % or more at least one second dopant element selected from the group consisting of Al, Ga and In, the balance consisting essentially of ZnO and optionally at least one third dopant element selected from the group consisting of Br, Cl, F, Sn, Y, Pr, Ge, B, Sc, Si, Ti, Zr, Hf, Mn, Ta, W, Cu, Ni, Cr, La, Gd, Bi, Ce, Sr and Ba, wherein the (002)-plane or (100)-plane orientation in the plate surface is 60% or more. The Mg-containing zinc oxide sintered compact of the present invention has excellent properties such as high orientation despite solid dissolution of Mg.Type: GrantFiled: January 30, 2017Date of Patent: October 15, 2019Assignee: NGK Insulators, Ltd.Inventors: Sota Okochi, Jun Yoshikawa, Koichi Kondo
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Patent number: 10442739Abstract: Provided is a porous plate-shaped filler that can be used as a material for a heat-insulation film having excellent heat insulation performance. In a porous plate-shaped filler 1 having a plate shape, an aspect ratio is 3 or higher, a minimum length is 0.5 to 50 ?m, and an overall porosity is 20 to 90%, and the porosity is lower in the circumferential part than in the center part. When this porous plate-shaped filler 1 of the present invention is contained in a heat-insulation film, the infiltration of a matrix into the filler is reduced, and thus the thermal conductivity can be lowered. Therefore, even a thin heat-insulation film can have a greater heat-insulation effect than before.Type: GrantFiled: July 28, 2016Date of Patent: October 15, 2019Assignee: NGK Insulators, Ltd.Inventor: Hiroharu Kobayashi
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Patent number: 10435815Abstract: An oriented alumina substrate for epitaxial growth according to an embodiment of the present invention includes crystalline grains constituting a surface thereof, the crystalline grains having a tilt angle of 0.1° or more and less than 1.0° and an average sintered grain size of 10 ?m or more.Type: GrantFiled: February 22, 2018Date of Patent: October 8, 2019Assignee: NGK Insulators, Ltd.Inventors: Morimichi Watanabe, Kei Sato, Kiyoshi Matsushima, Tsutomu Nanataki
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Patent number: 10435331Abstract: A honeycomb structure includes a honeycomb substrate including latticed partition walls which define a plurality of cells extending from one end face to the other end face and forming through channels for fluid and a honeycomb outer wall, and a flange portion attached to a part of the honeycomb outer wall of the honeycomb substrate, and including latticed flange partition walls which define a plurality of flange cells extending from one flange end face to the other flange end face and a flange outer wall, and in the honeycomb substrate, a ratio of a non-outer wall region in which the honeycomb outer wall is not disposed is in a range of 10 to 90% to a total area of a substrate circumferential surface.Type: GrantFiled: September 18, 2017Date of Patent: October 8, 2019Assignee: NGK Insulators, Ltd.Inventor: Toshio Yamada
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Patent number: 10435816Abstract: An oriented alumina substrate for epitaxial growth according to an embodiment of the present invention includes crystalline grains constituting a surface thereof, the crystalline grains having a tilt angle of 1° or more and 3° or less and an average sintered grain size of 20 ?m or more.Type: GrantFiled: February 22, 2018Date of Patent: October 8, 2019Assignee: NGK Insulators, Ltd.Inventors: Morimichi Watanabe, Kei Sato, Kiyoshi Matsushima, Tsutomu Nanataki
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Patent number: 10435570Abstract: The circumference coating material fills a recessed groove that is formed on a circumferential surface of a honeycomb fired body and extends an axial direction at which a part of cells are opened to the outside and to cover the circumferential surface, thereby forming a circumferential wall on the circumferential surface of a honeycomb structure, and the circumference coating material includes colloidal silica in a part of raw materials to be used and has a chlorine concentration of 150 ppm or less. In addition, the colloidal silica to be used has a chlorine concentration of 500 ppm or less, and the colloidal silica is produced using at least any one acid of sulfuric acid, phosphoric acid, and organic acid.Type: GrantFiled: February 26, 2016Date of Patent: October 8, 2019Assignee: NGK Insulators, Ltd.Inventors: Yohei Ono, Yasushi Uchida
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Publication number: 20190301328Abstract: A honeycomb filter, including: a honeycomb structure, wherein the honeycomb structure further includes a platinum group element-containing catalyst layer and a trapping layer, the platinum group element-containing catalyst layer is disposed at least on an entire surface of a side of an inner surface of the partition walls surrounding either one of the inflow cells or the outflow cells, the trapping layer does not contain a platinum group element, and the trapping layer is disposed in a range of at least up to 50% with respect to an overall length of the honeycomb structure starting from the outflow end face and is not disposed in a range of at least up to 40% with respect to the overall length starting from the inflow end face, in an extending direction of the cells of the honeycomb structure.Type: ApplicationFiled: March 18, 2019Publication date: October 3, 2019Applicants: NGK Insulators, Ltd., Honda Motor Co., Ltd.Inventors: Fumihiko Yoshioka, Norihiro Wakida, Yoshiaki Hatakeyama, Noritaka Masumitsu
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Publication number: 20190299142Abstract: A honeycomb filter includes a honeycomb structure including a porous partition wall surrounding cells, porous inflow side plugging portions and porous outflow side plugging portions. Each inflow side plugging portion includes, on an inflow side, a low porosity part having a porosity P1(%) of 70% or less and includes, on an outflow side, a high porosity part having a higher porosity than the low porosity part. The high porosity part has a porosity P2(%) satisfying P2?(0.8904×P3)+(0.7716×N1)?37.585, where P3(%) represents a porosity (%) of the partition wall; and N1(%) represents an open frontal area (%) of the cells, and the high porosity part has a length of 1 mm or more.Type: ApplicationFiled: March 14, 2019Publication date: October 3, 2019Applicant: NGK Insulators, Ltd.Inventor: Takashi AOKI
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Publication number: 20190299147Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall surrounding cells each of which has one end plugged by a plugging portion. An open frontal area O (%) of the cells in the honeycomb structure body is 75 to 80%, a porosity P (%) of the partition wall measured by a mercury press-in method is 52 to 58%, an average pore diameter D (?m) of the partition wall measured by the mercury press-in method is 6 to 12 ?m, and a pore volume rate A (%) of pores whose pore diameters are not less than 20 ?m with respect to an overall pore volume of the partition wall is not more than 13.5%.Type: ApplicationFiled: March 11, 2019Publication date: October 3, 2019Applicant: NGK Insulators, Ltd.Inventor: Fumihiko Yoshioka
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Publication number: 20190301325Abstract: 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 inflow cells, and the platinum group element-containing catalyst layer is disposed in a range of at least up to 40% 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.Type: ApplicationFiled: March 18, 2019Publication date: October 3, 2019Applicants: NGK Insulators, Ltd, Honda Motor Co., ltd.Inventors: Fumihiko YOSHIOKA, Yoshiaki HATEKAYAMA, Noritaka MASUMITSU
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Publication number: 20190301326Abstract: 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.Type: ApplicationFiled: March 18, 2019Publication date: October 3, 2019Applicants: NGK Insulators, Ltd., Honda Motor Co., Ltd.Inventors: Fumihiko YOSHIOKA, Yoshiaki HATEKAYAMA, Noritaka MASUMITSU
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Publication number: 20190300448Abstract: A honeycomb structure includes honeycomb segments, bonding layers and a circumferential wall. The bonding layers include bottomed-hollow voids which extend toward an internal side in an axial direction from an end face of the honeycomb structure and which are formed at at least one of intersections, and a ratio of a depth of each void in the axial direction to a length of each honeycomb segment in the axial direction is 5% or more.Type: ApplicationFiled: March 1, 2019Publication date: October 3, 2019Applicant: NGK Insulators, Ltd.Inventor: Tomohiro ISHIOKA
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Publication number: 20190301331Abstract: A heat generation system including: a liquid storage tank; a heating element including: a reaction container having a storage space, and a porous body stored in the storage space, and loaded with an exothermic reaction solid that causes an exothermic reaction when being in contact with the liquid; a liquid injection mechanism member including: a liquid flow pipe that communicates between the liquid storage tank and the storage space of the reaction container, through which the liquid flows, and an injection unit that injects the liquid into the storage space; and discharge mechanism member including: a discharge pipe that communicates with the storage space of the reaction container, and a discharge unit that discharges a liquid product generated by the exothermic reaction caused by contact between the liquid and the exothermic reaction solid, and a vaporized material of the liquid, from the storage space through the discharge pipe.Type: ApplicationFiled: June 19, 2019Publication date: October 3, 2019Applicant: NGK Insulators, Ltd.Inventors: Yukio MIYAIRI, Shinichi MIWA
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Publication number: 20190299203Abstract: A honeycomb structure includes a pillar-shaped honeycomb structure body which has porous partition walls disposed to surround a plurality of cells Among the partition walls surrounding one of the cells, each of the partition walls constituting two opposite sides of the cell sandwiched therebetween is provided with a projection which project to extend into the cell and which is continuously provided in a direction in which the cell extends, and the area S1 of one region of the cell divided by a virtual line that virtually connects distal ends of the two projections in a section of the honeycomb structure body, and the area S2 of the other region (S1?S2) of the cell satisfy 70%?S1/S2×100%.Type: ApplicationFiled: March 20, 2019Publication date: October 3, 2019Applicant: NGK Insulators, Ltd.Inventor: Takashi Kinoshita
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Publication number: 20190300443Abstract: The honeycomb structure is equipped with a pillar-shaped honeycomb structure body having a porous partition wall that defines a plurality of cells extending from an inflow end face to an outflow end face and serving as a through channel of a fluid and a circumferential wall placed to surround the circumference of the partition wall. The honeycomb structure body has, in a face orthogonal to an extending direction of the cells of the honeycomb structure body, a circumferential cell structure, a center cell structure, and a boundary wall placed at a boundary between the circumferential cell structure and the center cell structure and incomplete cells of 5% or more to 50% or less of the total number of the incomplete cells of the center cell structure is communicated with incomplete cells of the circumferential cell structure with each other.Type: ApplicationFiled: March 19, 2019Publication date: October 3, 2019Applicant: NGK Insulators, Ltd.Inventor: Takashi KINOSHITA
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Publication number: 20190299146Abstract: A honeycomb filter including: a pillar-shaped honeycomb structure including porous partition walls; and porous plugging portions disposed on either one of end portions of each of the cells, wherein a porosity (%) of the partition walls is defined as P1, a porosity (%) of the plugging portions is defined as P2, an occupancy (%) of the partition walls relative to an area of a cross section orthogonal to an extending direction of the cells of the honeycomb structure is defined as N1, the P1 is 50 to 65%, the P2 is 60 to 70%, the N1 is 22 to 39%, and X represented by Formula (1) satisfies a relation of Formula (2): X=P1/P2×N1,??Formula (1): 18.80??0.19X2+11.33X?121.63?50.50.Type: ApplicationFiled: March 11, 2019Publication date: October 3, 2019Applicant: NGK Insulators, Ltd.Inventor: Yoshiki KONNO
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Publication number: 20190301335Abstract: A honeycomb structure includes a porous partition wall disposed so as to surround cells extending from a first end face to a second end face. The cells include partially clogged cells which account for 10 to 80% of the total number of the cells, and each of which includes a protrusion that protrudes inward from the surface of the partition wall. The protrusion is partially formed in a direction in which each partially clogged cell extends. In a projected view from the first end face to the second end face, a ratio of area of the protrusion in each partially clogged cell to whole area of the through channel of each partially clogged cell is 5 to 80%, the whole area including the protrusion, and the partition wall surrounding each partially clogged cell has a thickness at a thinnest part of 0.038 mm or more.Type: ApplicationFiled: March 4, 2019Publication date: October 3, 2019Applicant: NGK Insulators, Ltd.Inventors: Yudai Kurimoto, Shogo Hirose
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Publication number: 20190301327Abstract: 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.Type: ApplicationFiled: March 18, 2019Publication date: October 3, 2019Applicants: NGK Insulators, Ltd., Honda Motor Co., Ltd.Inventors: Fumihiko YOSHIOKA, Yoshiaki HATEKAYAMA, Noritaka MASUMITSU
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Patent number: 10427108Abstract: A zeolite film structure comprising a support, a zeolite film and a protective film. The zeolite film is formed on a surface of the support. The protective film is formed on a surface of the zeolite film. The protective film is configured from organic-nonorganic hybrid silica or carbon. An average thickness of the protective film is less than or equal to 172 nanometers and greater than or equal to 44 nanometers.Type: GrantFiled: August 29, 2017Date of Patent: October 1, 2019Assignee: NGK Insulators, Ltd.Inventors: Naoto Kinoshita, Hiroyuki Shibata
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Patent number: 10428717Abstract: Provided is a method for diagnosing whether an oxidation catalyst has degraded, based on an output value from one diagnostic sensor with higher accuracy. When a ratio of nitrogen monoxide that is oxidized by a catalyst and discharged downstream of the catalyst as nitrogen dioxide, with respect to nitrogen monoxide contained in an exhaust gas supplied upstream of the catalyst in an exhaust path is defined as a NO conversion rate, a diagnostic sensor configured to output an electromotive force corresponding to the NO conversion rate as a diagnostic output is provided downstream of the catalyst in the exhaust path, and whether the catalyst has degraded beyond an acceptable limit is diagnosed by comparing the diagnostic output with a threshold value predetermined depending on a temperature of the catalyst.Type: GrantFiled: July 3, 2017Date of Patent: October 1, 2019Assignee: NGK Insulators, Ltd.Inventors: Kosuke Monna, Taku Okamoto, Noriko Hirata