公开(公告)号：US11492264B2

公开(公告)日：2022-11-08

申请号：US16298240

申请日：2019-03-11

Applicant: NGK INSULATORS, LTD.

Inventor： Ryotaro Yoshimura ,  Aya Miura ,  Kenichi Noda

IPC: C01B37/04 ,  B01D53/22 ,  B01D71/02 ,  B01D67/00

Abstract: Seed crystals are crystals of zeolite to be attached onto a support in production of a zeolite membrane complex including the support and a zeolite membrane formed on the support. The specific surface area of the seed crystals is not smaller than 10 m2/g and not larger than 150 m2/g. The strength obtained from a crystal component at a diffraction angle 2θ indicating a maximum peak in a range of diffraction angle 2θ from 12° to 25° in an X-ray diffraction pattern obtained by emitting X-ray to the seed crystals is not less than once and not more than 30 times that obtained from an amorphous component. It is thereby possible to improve adherence of the seed crystals to the support.

公开(公告)号：US11473980B2

公开(公告)日：2022-10-18

申请号：US16797320

申请日：2020-02-21

Applicant: NGK INSULATORS, LTD.

Inventor： Naoya Takase

IPC: G01K7/16 ,  F01N11/00 ,  G01R19/00

Abstract: A method for measuring a heat generation distribution in a honeycomb structure includes: applying a voltage to a pair of electrode layers of the honeycomb structure to bring the honeycomb structure to an electrically conductive state; measuring resistance values Rn between two different points on the surface of an outer peripheral wall of the honeycomb structure; estimating a current value In flowing between the two points using Kirchhoff's law based on each of the resistance values Rn between the two different points, and calculating a heat value generated for each of the resistance values Rn based on each of the resistance values Rn and the current value In; and estimating a heat generation distribution in the honeycomb structure based on both the positions at which each of the resistance values Rn is measured, and the heat value calculated from each of the resistance values Rn, in the honeycomb structure.

公开(公告)号：US20220328723A1

公开(公告)日：2022-10-13

申请号：US17807395

申请日：2022-06-17

Applicant: NGK Insulators, Ltd.

Inventor： Hirohisa OGAWA ,  Yoshimasa KOBAYASHI ,  Kazuki IIDA ,  Hiroyuki SHIBATA

IPC: H01L33/32 ,  H01L21/205 ,  H01L21/02 ,  C30B29/38 ,  C30B29/40

Abstract: An AlN monocrystal plate disclosed herein may include: a first surface in a thickness direction; and a second surface opposing the first surface. A metal component containing region may be disposed substantially parallel to the first surface in an intermediate portion between the first surface and the second surface. In the metal component containing region, a plurality of metal components may be introduced and distributed. A type of the metal components may be Ga.

公开(公告)号：US20220317086A1

公开(公告)日：2022-10-06

申请号：US17838546

申请日：2022-06-13

Applicant: NGK INSULATORS, LTD.

Inventor： Yuki NAKAYAMA ,  Shota KAGEYAMA ,  Yusuke FUJII ,  Kei KOSAKA

IPC: G01N27/407 ,  G01N27/409

Abstract: A gas sensor includes a sensor element and one or more hollow columnar dense bodies. The sensor element includes an element main body having a side surface, a porous layer and a water-penetration reduction portion that cover at least a front end-side part of the side surface. The water-penetration reduction portion disposed on the side surface so as to divide the porous layer or to be located closer to the rear end than the porous layer, an overlap length W that is the length of a continuous overlap between a range in which the water-penetration reduction portion is present in a longitudinal direction and a range in which inner peripheral surfaces of the one or more dense bodies are present in the longitudinal direction being 0.5 mm or more, and having a dense layer covers the side surface, the water-penetration reduction portion reduces the capillarity of water.

公开(公告)号：US20220317084A1

公开(公告)日：2022-10-06

申请号：US17694996

申请日：2022-03-15

Applicant: NGK INSULATORS, LTD.

Inventor： Kana IBATA ,  Yusuke WATANABE ,  Shiho IWAI ,  Takayuki SEKIYA ,  Yosuke NORITAKE ,  Daichi KONDO

IPC: G01N27/407 ,  G01N27/406 ,  G01N27/419 ,  H05B3/14 ,  H05B1/02

Abstract: A ceramic heater is provided in an electronic component, and by supplying electrical current thereto, a heat generating portion thereof is heated to a temperature of greater than or equal to 700[° C.] and less than 950[° C.]. An energizing current waveform of the electrical current to the heat generating portion is a pulse waveform, and a product of a pulse voltage Vp [V] and a period T [ms] of the pulse waveform is less than or equal to 600 [V·ms].

公开(公告)号：US20220317083A1

公开(公告)日：2022-10-06

申请号：US17699896

申请日：2022-03-21

Applicant: NGK Insulators, Ltd.

Inventor： Yusuke WATANABE ,  Shotaro NIIZUMA ,  Hayami AOTA ,  Toshihiro HIRAKAWA

IPC: G01N27/407 ,  G01N27/406

Abstract: Provided is a gas sensor intended to achieve improved measurement accuracy. A gas sensor according to one aspect of the present invention includes: a gas sensor element including a gas introduction opening and a gas exhaust unit; and a protective member including a plurality of porous layers and configured to cover the gas sensor element. The plurality of porous layers include a first porous layer arranged on the innermost side and a second porous layer arranged on an outer side of the first porous layer. The first porous layer has a higher porosity than the second porous layer. The gas introduction opening and the gas exhaust unit are covered by the first porous layer. The protective member includes, between the gas introduction opening and the gas exhaust unit, a restricting portion configured to restrict the flow of gas.

公开(公告)号：US20220316985A1

公开(公告)日：2022-10-06

申请号：US17699836

申请日：2022-03-21

Applicant: NGK Insulators, Ltd.

Inventor： Yusuke WATANABE ,  Shotaro NIIZUMA ,  Hayami AOTA ,  Toshihiro HIRAKAWA ,  Kirari TAKAHASHI

IPC: G01M15/10 ,  F01N13/00

Abstract: The probability of a heater portion of a sensor element being exposed to water is lowered. The sensor element includes a built-in heater that extends in a longitudinal direction and a surrounding housing extending in the longitudinal direction. The heater includes a heat generation portion and a lead portion. The heat generation portion has a front end and a rear end, and is positioned on the same side as a front end portion side of the sensor element. The housing includes an enlarged diameter portion having a diameter of an inner wall that increases in a direction toward the front end of the sensor. The enlarged diameter portion includes a front end portion and a rear end portion. The rear end of the heat generation portion is located closer to the front end of the sensor than the rear end portion of the enlarged diameter portion is.

公开(公告)号：US20220308011A1

公开(公告)日：2022-09-29

申请号：US17702018

申请日：2022-03-23

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke WATANABE ,  Takayuki SEKIYA ,  Shotaro NIIZUMA ,  Hayami AOTA ,  Toshihiro HIRAKAWA

IPC: G01N27/41 ,  G01N33/00

Abstract: A sensor element includes a base part including a plurality of oxygen-ion-conductive solid electrolyte layers stacked; a measurement-object gas flow part for introduction and flow of a measurement-object gas through a gas inlet; an inner oxygen pump electrode disposed on an inner surface of the measurement-object gas flow part; and a measurement electrode disposed on the inner surface of the measurement-object gas flow part. The inner oxygen pump electrode includes: a region (A) including an electrode end close to the gas inlet, and a region (B) including an electrode end far from the gas inlet. A content rate of an activity reducing metal in a metal material in the region (A) is higher than that in the region (B). A ratio of the length of the region (A) of the inner oxygen pump electrode to the length of the inner oxygen pump electrode is 15% to 90%.

公开(公告)号：US20220305478A1

公开(公告)日：2022-09-29

申请号：US17644373

申请日：2021-12-15

Applicant: NGK Insulators, Ltd.

Inventor： Sachiko ISHIDA ,  Fumihiko YOSHIOKA

IPC: B01J35/04 ,  B01J35/10 ,  B01J23/44 ,  B01J21/04 ,  B01D46/24 ,  B01D53/94

Abstract: A honeycomb filter includes a honeycomb structure having a porous partition wall disposed to surround a plurality of cells; and a plugging portion provided at one end of the cell, wherein the honeycomb structure has an inflow side region including a range of up to at least 30% with respect to the total length of the honeycomb structure with the inflow end face as the starting point and an outflow side region including a range of up to at least 20% with respect to the total length of the honeycomb structure with the outflow end face as the starting point, in the extending direction of the cell of the honeycomb structure, an average pore diameter of the partition wall in the inflow side region is 9 to 14 μm and an average pore diameter of the partition wall in the outflow side region is 15 to 20 μm.

公开(公告)号：US20220305477A1

公开(公告)日：2022-09-29

申请号：US17644367

申请日：2021-12-15

Applicant: NGK INSULATORS, LTD.

Inventor： Masaki HOURA ,  Takayuki INOUE ,  Takashi NORO

IPC: B01J35/04 ,  F01N3/20 ,  B01D53/94

Abstract: A honeycomb structure according to at least one embodiment of the present invention includes: a honeycomb structure portion having: an outer peripheral wall; and a partition wall arranged inside the outer peripheral wall to define a plurality of cells each extending from a first end surface of the honeycomb structure portion to a second end surface thereof to form a flow path; and a pair of electrode portions arranged on an outer peripheral surface of the outer peripheral wall of the honeycomb structure portion. The electrode portions are each a porous body in which particles of silicon carbide are bound by a binding material, the silicon carbide contains α-type silicon carbide and β-type silicon carbide, and the silicon carbide has a D50 in a volume-based cumulative particle size distribution of 25 μm or less.