公开(公告)号：US09976979B2

公开(公告)日：2018-05-22

申请号：US14862209

申请日：2015-09-23

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Satoshi Okazaki ,  Akinori Kojima ,  Masaki Mizutani ,  Nobuo Furuta ,  Ai Igarashi

IPC: G01N27/407 ,  B05D3/06 ,  B05D3/00 ,  B05D3/02

CPC classification number: G01N27/4073

Abstract: A gas sensor element (10) includes a first composite ceramic layer (111) having a plate-shaped first surrounding portion (112) formed of an insulating ceramic and including a through hole inner-perimetric-surface (115) which defines a through hole (112h), and a plate-shaped first electrolyte portion (121) formed of a solid electrolyte ceramic, disposed in the through hole (112h), and including an electrolyte outer-perimetric-surface (125) in contact with the through hole inner-perimetric-surface (115). The electrolyte outer-perimetric-surface (125) of the first electrolyte portion (121) is sloped toward an exterior of the first electrolyte portion (121) as it approaches one side DT1. The through hole inner-perimetric-surface (115) and the electrolyte outer-perimetric-surface 125 are in close contact with each other along their entire perimeters.

公开(公告)号：US10247698B2

公开(公告)日：2019-04-02

申请号：US14992577

申请日：2016-01-11

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Ai Igarashi ,  Satoshi Okazaki

IPC: G01N27/407 ,  G01N27/417 ,  B28B17/00 ,  B28B19/00

Abstract: A gas sensor element that includes a composite ceramic layer including a plate-shaped insulating portion which contains an insulating ceramic and has a through-hole, and an electrolyte portion which contains a solid electrolyte ceramic, and a portion disposed in the through-hole where the electrolyte portion is thicker than the insulating portion. A first conductor layer is formed over a first insulating surface of the insulating portion and a first electrolyte surface of the electrolyte portion. The electrolyte portion has an extending portion which is overlaid on the first insulating surface and extends toward the outside of the through-hole. The thickness of the extending portion is decreased toward an outer periphery of the extending portion, and the outer periphery of the extending portion is continuously connected to the first insulating surface. A first extending surface of the extending portion continuously connects the first insulating surface and the first electrolyte surface.

公开(公告)号：US10145816B2

公开(公告)日：2018-12-04

申请号：US14863509

申请日：2015-09-24

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Takashi Konno ,  Satoshi Okazaki ,  Masaki Nakagawa ,  Haruhiko Shigeta

IPC: G01N27/407

Abstract: A gas sensor element (10) includes a composite ceramic layer (111) having an insulation portion (112) and an electrolyte portion (131) disposed within a through hole (112h), and a first conductor layer (150) extending in a continuous manner on a first insulation main surface (113) as well as on a first electrolyte main surface (133). The electrolyte portion (131) is thinner than the insulation portion (112), and the first electrolyte main surface (133) is located on a thickness-direction inward side DTN. The insulation portion (112) has, on a first insulation main surface side, a protruding portion (122) overlying the first electrolyte main surface (133). The thickness of the protruding portion (122) reduces toward the inward side DR1 of the through hole (112h). The first conductor layer (150) extends in a continuous manner on a protrusion surface (122s) as well as on the first electrolyte main surface (133).

公开(公告)号：US11535569B2

公开(公告)日：2022-12-27

申请号：US16807289

申请日：2020-03-03

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Satoshi Okazaki ,  Masaki Mizutani ,  Ai Igarashi

IPC: C04B35/64 ,  G01N27/407 ,  G01N27/409 ,  C04B37/00

Abstract: A method for manufacturing a sensor element that includes: a pair of electrodes; a ceramic layer having a hollow space that is to be an air introduction hole; and a first layer and a second layer stacked at both surfaces of the ceramic layer, One of the electrodes is in communication with the hollow space, The method includes: preparing an unsintered ceramic sheet, and a burn-out material sheet having a thickness different from that of the unsintered ceramic sheet, the burn-out material sheet having, in a plane orthogonal to the direction of an axial line O, a cross-sectional area substantially identical to a cross-sectional area of the pre-sintering hollow space; placing the burn-out material sheet in the pre-sintering hollow space; pressing the sheets so as to have an identical thickness; and burning out the burn-out material sheet.

公开(公告)号：US09739748B2

公开(公告)日：2017-08-22

申请号：US14664408

申请日：2015-03-20

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Satoshi Okazaki ,  Seiji Oya ,  Yuta Oishi

IPC: G01N27/407

CPC classification number: G01N27/4071

Abstract: A gas detection element of a gas sensor has a reference gas introduction passage formed therein and extending from an opening at a radially outer perimetric surface of an element rear-end portion to a detecting section of an element forward-end portion for introducing reference gas from the opening to the detecting section. The entirety of the reference gas introduction passage is provided on a forward side in an axial direction with respect to contact portions of electrode pads and through hole conductors which are formed on and in the element rear-end portion.

公开(公告)号：US10012611B2

公开(公告)日：2018-07-03

申请号：US14603526

申请日：2015-01-23

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Satoshi Okazaki ,  Yuta Oishi ,  Seiji Oya

IPC: G01N27/407 ,  G01N27/409

CPC classification number: G01N27/4071 ,  G01N27/409

Abstract: A gas sensor element (120) configured as a laminate of an oxygen pump cell (135) and an oxygen concentration detection cell (150) with a spacer (145) sandwiched therebetween. The spacer (145) has a gas detecting chamber (145c) formed therein and electrodes (138) and (152) of the cells (135) and (150), respectively, facing the chamber (145c). A leakage section (148) is faces the gas detecting chamber (145c) (measuring chamber).