公开(公告)号：US10167235B2

公开(公告)日：2019-01-01

申请号：US14848938

申请日：2015-09-09

Applicant: NGK Insulators, Ltd.

Inventor： Yunie Izumi ,  Yoshimasa Kobayashi ,  Kenji Morimoto ,  Shinji Kawasaki

IPC: C04B37/02 ,  C04B35/111 ,  C04B35/12 ,  C04B35/565 ,  C04B35/573 ,  C04B37/00 ,  C04B38/00 ,  C04B35/01 ,  C04B35/26 ,  C04B35/45 ,  B23K20/16 ,  B23K20/22 ,  B23K35/26 ,  B23K35/28 ,  B23K35/32 ,  B32B3/12 ,  B32B7/04 ,  B32B9/00 ,  B32B15/04 ,  B23K103/16 ,  B23K103/00 ,  B23K103/08 ,  B23K103/14 ,  B23K103/18 ,  B23K103/02 ,  B23K103/12

Abstract: A joined body 20 includes a porous ceramic 22 made of porous ceramic, a metal member 24 made of a metal, and a joint 30 formed of an oxide ceramic that penetrates into pores 23 of the porous ceramic 22 and joins the porous ceramic 22 to the metal member 24. The penetration depth of the oxide ceramic into the pores of the porous ceramic is preferably 10 μm or more, and more preferably 15 to 50 μm. The joined body 20 may be produced through a joining step of forming a joint by placing a metal raw material between a porous ceramic and a metal member and firing the metal raw material in the air at a temperature in the range of 400° C. to 900° C., where an oxide ceramic produced by oxidation of the metal raw material penetrates into the pores of the porous ceramic in the joint.

公开(公告)号：US11578629B2

公开(公告)日：2023-02-14

申请号：US17135070

申请日：2020-12-28

Applicant: NGK INSULATORS, LTD.

Inventor： Shogo Takeno ,  Kousuke Ujihara ,  Kenji Morimoto

IPC: F01N3/022 ,  B01D39/20 ,  B01D46/24 ,  B01J23/10 ,  B01J35/04 ,  B01D46/82 ,  F01N3/023

Abstract: A porous composite includes a porous base material, and a porous collection layer. The collection layer is provided on the base material. The collection layer contains praseodymium oxide.

公开(公告)号：US11071937B2

公开(公告)日：2021-07-27

申请号：US16364703

申请日：2019-03-26

Applicant: NGK INSULATORS, LTD.

Inventor： Masaki Ishikawa ,  Takahiro Tomita ,  Kenji Morimoto

IPC: F01N3/022 ,  B01D46/24

Abstract: A ceramic porous body includes skeleton portions; and pore portions formed between the skeleton portions, the pore portions being capable of allowing a fluid to flow therethrough. In a cross section parallel to a flow direction of the fluid, the skeleton portions have a ratio of a skeleton length of 40 μm or more of 15% or less in a direction orthogonal to the flow direction of the fluid.

公开(公告)号：US10564139B2

公开(公告)日：2020-02-18

申请号：US15915467

申请日：2018-03-08

Applicant: NGK INSULATORS, LTD.

Inventor： Kosuke Ujihara ,  Toru Hayase ,  Kenji Morimoto

IPC: G01N27/407 ,  G01N33/00 ,  G01M15/10

Abstract: A heater part of a planar sensor element includes: a Pt heater element; and an insulating layer including 90-99.9 wt % of an insulating material having a different coefficient of thermal expansion from a solid electrolyte forming a base part of the element. The heater part other than a heater electrode is buried in the base part. The insulating layer includes: a porous portion having a porosity of 20-40%; and a dense portion having a porosity of 4% or less. The heater element is covered with the dense portion. A laminated portion in which the porous portion and the dense portion are laminated has a total thickness of 25-100 μm. The dense portion has a thickness of 5 μm or more. A thickness ratio of the dense portion to the porous portion is 0.05 to 2.0.

公开(公告)号：US20180284051A1

公开(公告)日：2018-10-04

申请号：US15915536

申请日：2018-03-08

Applicant: NGK INSULATORS, LTD.

Inventor： Kosuke Ujihara ,  Toru Hayase ,  Kenji Morimoto

IPC: G01N27/406 ,  G01N27/407

Abstract: A heater part of a planar sensor element includes: a heater element containing Pt; an insulating layer covering the heater element; and a heater electrode located on a main surface of the sensor element to be exposed. A portion of the heater part other than the heater electrode is buried in a base part formed of a solid electrolyte. The insulating layer at least contains MgO, MgAl2O4, and Mg4Nb2O9 in a weight percentage of 97 wt % to 100 wt % in total. MgO, MgAl2O4, and Mg4Nb2O9 are contained in weight percentages of 30 wt % to 60 wt %, 30 wt % to 60 wt %, and 0.5 wt % to 15 wt %, respectively. The insulating layer has a porosity of 4% or less.

公开(公告)号：US20180284050A1

公开(公告)日：2018-10-04

申请号：US15915514

申请日：2018-03-08

Applicant: NGK INSULATORS, LTD.

Inventor： Kosuke Ujihara ,  Toru Hayase ,  Kenji Morimoto

IPC: G01N27/406 ,  G01N27/417 ,  G01N33/00

Abstract: A heater part of a planar sensor element includes: a Pt heater element; and an insulating layer including 90-99.9 wt % of an insulating material having a different coefficient of thermal expansion from a solid electrolyte forming a base part of the element. The heater part other than a heater electrode is buried in the base part. The heater element has a thickness of 10-50 μm and is covered with the insulating layer. The insulating layer has a porosity of 4% or less and a thickness of 50-150 μm. The distances of the insulating layer from an end portion of the element, from a main surface on which the heater electrode is located, and from a side surface of the element are respectively 0.25-0.75 mm, 0.20-0.60 mm, and 0.20-0.60 mm. The total length of the element is 80.0 mm or less.

公开(公告)号：US09945279B2

公开(公告)日：2018-04-17

申请号：US15461803

申请日：2017-03-17

Applicant: NGK INSULATORS, LTD.

Inventor： Yunie Izumi ,  Kenji Morimoto

IPC: B01J23/32 ,  F01N3/28 ,  B01J23/889 ,  B01J35/04 ,  F01N3/10

CPC classification number: F01N3/2842 ,  B01J23/8892 ,  B01J35/04 ,  F01N3/035 ,  F01N3/103 ,  F01N3/106 ,  F01N3/2066 ,  F01N2370/02 ,  F01N2510/00 ,  F01N2610/02 ,  Y02T10/24

Abstract: A honeycomb structure includes: a honeycomb structure body including a plurality of cells defined by a partition wall and serving as a through channel of fluid; and a plugging portion to alternately plug open end parts of the plurality of cells on one side as an inflow side of the exhaust gas and open end parts on the other side as an outflow side of the exhaust gas. The partition wall is loaded, on the side of the outflow cells, with an oxidation catalyst made of a transition metal oxide at least including Fe and Mn to oxidize NO gas or an oxidation catalyst made of a transition metal oxide loaded at CeO2 and at least including Fe and Mn to oxidize NO gas. The loading amount of the oxidation catalyst is 5.0 g/L or more and 50 g/L or less.

公开(公告)号：US09679685B2

公开(公告)日：2017-06-13

申请号：US14662669

申请日：2015-03-19

Applicant: NGK Insulators, Ltd.

Inventor： Satoshi Yamazaki ,  Toru Hayase ,  Kenji Morimoto ,  Shinji Kawasaki ,  Yukihisa Takeuchi

IPC: H01C7/112 ,  C04B35/453 ,  H01C7/102 ,  H01C7/18 ,  H01C17/00 ,  C04B35/626 ,  C04B37/00 ,  H01C7/10 ,  H01C7/12

CPC classification number: H01C7/112 ,  C04B35/453 ,  C04B35/62695 ,  C04B37/003 ,  C04B37/005 ,  C04B37/006 ,  C04B2235/3217 ,  C04B2235/322 ,  C04B2235/3284 ,  C04B2235/3286 ,  C04B2235/443 ,  C04B2235/5436 ,  C04B2235/5454 ,  C04B2235/658 ,  C04B2235/96 ,  C04B2237/06 ,  C04B2237/066 ,  C04B2237/125 ,  C04B2237/126 ,  C04B2237/34 ,  C04B2237/708 ,  C04B2237/72 ,  H01C7/10 ,  H01C7/1006 ,  H01C7/102 ,  H01C7/12 ,  H01C7/18 ,  H01C17/00 ,  Y10T29/49082

Abstract: The voltage nonlinear resistive element includes a resistor containing a joined body in which a zinc oxide ceramic layer composed mainly of zinc oxide and having a volume resistivity of less than 1.0×10−2 Ωcm is joined to a rare-earth metal oxide layer composed mainly of a rare-earth metal oxide, and a pair of electrodes disposed on the resistor such that an electrically conductive path passes through a junction between the zinc oxide ceramic layer and the rare-earth metal oxide layer. In this element, the zinc oxide ceramic layer of the joined body has a lower volume resistivity than before. This can result in a lower clamping voltage in a high electric current region than before.

公开(公告)号：US09679684B2

公开(公告)日：2017-06-13

申请号：US14662625

申请日：2015-03-19

Applicant: NGK Insulators, Ltd.

Inventor： Satoshi Yamazaki ,  Toru Hayase ,  Kenji Morimoto ,  Shinji Kawasaki ,  Yukihisa Takeuchi

IPC: H01C7/112 ,  C04B35/453 ,  H01C7/102 ,  H01C7/18 ,  H01C17/00 ,  H01C7/12 ,  C04B35/626 ,  C04B37/00 ,  H01C7/10

CPC classification number: H01C7/112 ,  C04B35/453 ,  C04B35/62695 ,  C04B37/005 ,  C04B37/006 ,  C04B2235/3217 ,  C04B2235/322 ,  C04B2235/3267 ,  C04B2235/3277 ,  C04B2235/3284 ,  C04B2235/3286 ,  C04B2235/3294 ,  C04B2235/3298 ,  C04B2235/443 ,  C04B2235/5436 ,  C04B2235/5454 ,  C04B2235/658 ,  C04B2235/6586 ,  C04B2235/661 ,  C04B2235/96 ,  C04B2237/06 ,  C04B2237/125 ,  C04B2237/126 ,  C04B2237/34 ,  C04B2237/708 ,  C04B2237/72 ,  H01C7/10 ,  H01C7/1006 ,  H01C7/102 ,  H01C7/12 ,  H01C7/18 ,  H01C17/00 ,  Y10T29/49082

Abstract: A voltage nonlinear resistive element includes a resistor containing a joined body in which a zinc oxide ceramic layer composed mainly of zinc oxide and having a volume resistivity of 1.0×10−1 Ωcm or less is joined to a bismuth oxide layer composed mainly of bismuth oxide, and a pair of electrodes disposed on the resistor such that an electrically conductive path passes through a joint surface between the zinc oxide ceramic layer and the bismuth oxide layer. In this element, the zinc oxide ceramic layer of the joined body has a lower volume resistivity than before. This can result in a lower clamping voltage in a high-current region than before.