Patents Assigned to NGK Insulators, Ltd.
  • Publication number: 20220199990
    Abstract: Provided is a lithium titanate sintered plate having a structure in which a plurality of primary grains are bound together. The lithium titanate sintered plate has a composition represented by the general formula Li4(Ti5-?M?)O12-?, wherein M is at least one selected from the group consisting of Nb, Ta, and W; ? satisfies 0???2.5; and ? denotes oxygen-deficient amount, and may be 0, provided that ? and ? are not 0 at the same time.
    Type: Application
    Filed: March 9, 2022
    Publication date: June 23, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Yukinobu YURA, Shigeki OKADA
  • Patent number: 11365665
    Abstract: A porous material includes an aggregate, and a binding material that binds the aggregate together in a state where pores are formed. The porous material contains 0.1 to 10.0 mass % of an MgO component, 0.5 to 25.0 mass % of an Al2O3 component, and 5.0 to 45.0 mass % of an SiO2 component with respect to the mass of the whole porous material, and further contains 0.01 to 5.5 mass % of an Sr component in terms of SrO.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: June 21, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Yunie Izumi, Takahiro Tomita
  • Patent number: 11367631
    Abstract: A ceramic heater includes a ceramic plate having a wafer placement surface on which a wafer is to be placed, and incorporating a resistance heating element therein, and a ceramic tubular shaft having one end joined to a rear surface of the plate. The tubular shaft has a vertical sectional shape including an S-like portion or a curved portion having an inflection point in at least one position, and includes a through-hole penetrating the tubular shaft from the one end to the other end with an axis extending along the vertical sectional shape of the tubular shaft.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: June 21, 2022
    Assignee: NGK Insulators, Ltd.
    Inventor: Yutaka Unno
  • Patent number: 11365158
    Abstract: A honeycomb structure has a plurality of cells formed by a plurality of partition walls. The partition walls are formed of a porous material composed predominantly of cordierite. Each partition wall includes surface layer portions having a porosity of 50% or more and an inside portion having a porosity of 50% or more, the surface layer portions being portions ranging respectively from opposite surfaces to a depth corresponding to 25% of the thickness of the partition wall, and the inside portion being the other portion. The surface layer portions and the inside portion both include pores having axial pore widths of less than 30 ?m and pores having axial pore widths of 30 ?m or more. A mean axial pore width in the surface layer portions is smaller than a mean axial pore width in the inside portion.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: June 21, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Toru Hayase, Shinji Suzuki, Shinpei Oshima, Takahiro Tomita
  • Publication number: 20220189812
    Abstract: A semiconductor-manufacturing apparatus member includes an upper plate that has a wafer placement surface having a concave shape or a convex shape, that contains an electrostatic electrode, and that is composed of ceramics; an intermediate plate that is joined to a surface of the upper plate opposite the wafer placement surface with a first metal joining layer interposed therebetween; and a lower plate that is joined to a surface of the intermediate plate opposite the surface that is joined to the upper plate with a second metal joining layer interposed therebetween, wherein a thermal expansion coefficient of the intermediate plate is larger than thermal expansion coefficients of the upper plate and the lower plate.
    Type: Application
    Filed: September 3, 2021
    Publication date: June 16, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Hiroshi TAKEBAYASHI, Joyo Ito
  • Patent number: 11362344
    Abstract: A cell stack device includes a manifold and a fuel cell. The manifold includes a gas supply chamber and a gas collection chamber. The fuel cell includes a support substrate and a power generation element portion. The support substrate includes first and second gas channels. The first gas channel is connected to the gas supply chamber, and the second gas channel is connected to the gas collection chamber. The first gas channel is open in the gas supply chamber at a proximal end portion. The second gas channel is open in the gas collection chamber at a proximal end portion. The first and second gas channels are connected to each other on the distal end portion side. The first and second gas channels are configured such that a pressure loss of gas in the first gas channel is smaller than a pressure loss of gas in the second gas channel.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: June 14, 2022
    Assignee: NGK INSULATORS, LTD.
    Inventors: Risako Ito, Makoto Ohmori, Hirofumi Kan, Yuki Tanaka, Masayuki Shinkai
  • Patent number: 11359528
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion provided at an open end on a first end face side or a 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, a number per unit area of pores which exist at a surface of the partition wall and which have equivalent circle diameters exceeding 3.0 ?m is 1400 per mm2 or more, and, in a pore diameter distribution which indicates a cumulative pore volume of the partition wall, with a log pore diameter on a horizontal axis and a log differential pore volume (cm3/g) on a vertical axis, a half-value width of a first peak that includes a maximum value of the log differential pore volume is 0.30 or less.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: June 14, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Koichi Sendo, Yu Torii, Shuji Ueda, Shungo Nagai
  • Patent number: 11360043
    Abstract: A sensor element includes: an element base including: a ceramic body made of an oxygen-ion conductive solid electrolyte, and having an inlet at one end portion thereof; at least one internal chamber located inside the ceramic body, and communicating with the inlet under predetermined diffusion resistance; an electrochemical pump cell including an electrode located on an outer surface of the ceramic body, an electrode facing the internal chamber, and a solid electrolyte located therebetween; and a heater buried in the ceramic body; and a porous leading-end protective layer surrounding a first range at least including a leading end surface and a region to be coped with water-induced cracking specified in advance. A single heat insulating space is interposed between the leading-end protective layer and a whole side surface of the element base at least in the above region.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: June 14, 2022
    Assignee: NGK INSULATORS, LTD.
    Inventors: Yusuke Watanabe, Mika Kai, Ryo Onishi, Saki Suzuki
  • Patent number: 11353267
    Abstract: A heat exchanger includes: a hollow pillar shaped honeycomb structure, a first cylindrical member, a second cylindrical member, a cylindrical guide member, and an upstream cylindrical member. A communication port is provided between the downstream end portion of the guide member and the second cylindrical member or at the guide member. The second cylindrical member has a horn shape in which a diameter of the upstream end portion of the second cylindrical member is increased radially outward. The upstream cylindrical member has a flange portion, and a rising position of the flange portion is located on a more downstream side than the upstream end portion of the first cylindrical member.
    Type: Grant
    Filed: June 11, 2020
    Date of Patent: June 7, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Yutaro Fumoto, Tatsuo Kawaguchi
  • Patent number: 11351600
    Abstract: A nozzle put into a molten metal in vertical upwards continuous casting for casting a cast product by pulling up the molten metal, the nozzle includes a nozzle body having an intake hole through which the molten metal is taken in and which is formed in a lateral surface of the nozzle body and a flange portion formed on lower side of the intake hole and projecting beyond the nozzle body.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: June 7, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Ken Suzuki, Naokuni Muramatsu
  • Publication number: 20220174788
    Abstract: A ceramic heater includes a disc-shaped ceramic plate having a wafer placement surface, and a shaft provided on a surface on an opposite side of the wafer placement surface of the ceramic plate. First and second resistance heating elements are embedded inside the ceramic plate. When the ceramic plate is viewed from above, the gap (first gap) between first turn-back sections which face each other in a circumferential direction, and the gap (second gap) between second turn-back sections which face each other in a circumferential direction are arranged so as not to overlap.
    Type: Application
    Filed: November 17, 2021
    Publication date: June 2, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Tomohiro HARA, Yutaka UNNO
  • Patent number: 11349127
    Abstract: In a cell stack, each of the plurality of the electrochemical cells includes an alloy member, a first electrode layer, a second electrode layer, and an electrolyte layer. The alloy member includes a base member constituted by an alloy material containing chromium, a coating film that covers at least a part of a surface of the base member, and a separation inhibiting portion that inhibits the coating film from separating from the base member. The number of the separation inhibiting portions included in the alloy member of the central electrochemical cell is larger than the number of the separation inhibiting portions included in the alloy member of the end electrochemical cell.
    Type: Grant
    Filed: November 18, 2020
    Date of Patent: May 31, 2022
    Assignee: NGK INSULATORS, LTD.
    Inventors: Yuki Tanaka, Toshiyuki Nakamura, Makoto Ohmori
  • Publication number: 20220162768
    Abstract: An ?- or ?-Ga2O3 crystal is produced by bringing an aqueous solution including a Ga ion into a supercritical state having a temperature of 400° C. or more and a pressure of 22.1 MPa or more.
    Type: Application
    Filed: February 11, 2022
    Publication date: May 26, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Jun YOSHIKAWA, Miho MAEDA
  • Patent number: 11342551
    Abstract: There is provided a secondary zinc battery including: a unit cell including; a positive-electrode plate including a positive-electrode active material layer and a positive-electrode collector; a negative-electrode plate including a negative-electrode active material layer containing zinc and a negative-electrode collector; a layered double hydroxide (LDH) separator covering or wrapping around the entire negative-electrode active material layer; and an electrolytic solution. The positive-electrode collector has a positive-electrode collector tab extending from one edge of the positive-electrode active material layer, and the negative-electrode collector has a negative-electrode collector tab extending from the opposite edge of the negative-electrode active material layer and beyond a vertical edge of the LDH separator. The unit cell can thereby collects electricity from the positive-electrode collector tab and the negative-electrode collector tab.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: May 24, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Junki Matsuya, Yuichi Gonda, Takeshi Yagi, Kenshin Kitoh
  • Patent number: 11339099
    Abstract: A honeycomb structure including: a honeycomb structure body having porous partition walls which define a plurality of cells extending from an inflow end face to an outflow end face to form through channels for a fluid, and a first circumferential wall which is disposed in at least a part of a circumference of the partition walls, and a second circumferential wall disposed to surround an outer side of the honeycomb structure body, wherein the honeycomb structure body does not have an interface between the partition walls and the first circumferential wall, and in a face perpendicular to an extending direction of the cells, a maximum thickness of the first circumferential wall is from 0.1 to 0.3 mm.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: May 24, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Nobuyuki Kashiwagi, Yasunori Yamazaki, Hideyuki Toyoshima, Hirotaka Yamamoto
  • Publication number: 20220155619
    Abstract: There is provided a composite substrate in which peeling is significantly suppressed, light propagation loss is small when used as an electro-optical element, and high-speed and low-voltage drive is possible, and which can achieve an extremely thin electro-optical element capable of maintaining excellent reliability even under a severe high-temperature environment. A composite substrate for an electro-optical element according to an embodiment of the present invention includes: an electro-optical crystal substrate having an electro-optical effect; a first high dielectric layer; a second high dielectric layer; and a support substrate in the stated order. The first high dielectric layer and the second high dielectric layer are directly joined to each other, and an amorphous layer is formed at a joining interface between the first high dielectric layer and the second high dielectric layer.
    Type: Application
    Filed: February 2, 2022
    Publication date: May 19, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Ryosuke HATTORI, Tomoyoshi TAI, Keiichiro ASAI, Jungo KONDO
  • Publication number: 20220157946
    Abstract: Provided is a ?-Ga2O3 based semiconductor film which is a semiconductor film in a circular shape having a crystal having a corundum-type crystal structure composed of ?-Ga2O3 or an ?-Ga2O3 solid solution as a main phase. The maximum value ?max and the minimum value ?min for off-angles at the center point X and four outer circumferential points A, B, C, and D of a surface of the semiconductor film satisfy the relationship of ?max-?min?0.30°. The off-angle is defined as an inclination angle ? of a crystal axis oriented in the substantially normal direction of the semiconductor film with respect to the film surface normal of the semiconductor film.
    Type: Application
    Filed: January 31, 2022
    Publication date: May 19, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Hiroshi FUKUI, Morimichi WATANABE, Jun YOSHIKAWA
  • Patent number: 11332410
    Abstract: A sintered compact includes an alumina phase as a primary phase, and further includes an amorphous phase containing Si and Mn and a cordierite phase. The sintered compact has a porosity of higher than or equal to 1.1% and less than or equal to 5.0%. Preferably, I1/(I1+I2) is greater than or equal to 0.20 and less than or equal to 0.45, where I1 is the strength of the main peak of cordierite obtained by an XRD method, and I2 is the strength of the main peak of alumina.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: May 17, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Kyohei Atsuji, Noboru Nishimura, Yuji Katsuda
  • Patent number: 11333055
    Abstract: A catalyst deterioration diagnosis method is a method for a system. The system includes a stepped transmission or a continuously variable transmission connected to an internal combustion engine, a catalyst into which an exhaust gas from the internal combustion engine is introduced, and a gas sensor having sensitivity to ammonia that outputs a detection value corresponding to a component of an exhaust gas that has passed through the catalyst. The catalyst deterioration diagnosis method includes the following steps. Monitoring of temporary increase of a detection value of the gas sensor is started, and thereby a temporarily increased amount of the detection value of the gas sensor is acquired. The monitoring is started when upshifting of the stepped transmission or pseudo-upshifting of the continuously variable transmission is performed. Whether or not the temporarily increased amount is larger than a threshold amount is determined.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: May 17, 2022
    Assignee: NGK INSULATORS, LTD.
    Inventors: Taku Okamoto, Osamu Nakasone
  • Patent number: 11331613
    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 (?m) of each pore on an X-axis and a pore depth (?m) 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 ?m to 5.0 ?m, and a number density of the plurality of pores is 600/mm2 to 2450/mm2.
    Type: Grant
    Filed: February 5, 2021
    Date of Patent: May 17, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Takayuki Kanetake, Shingo Tokuda, Shuji Ueda