公开(公告)号：US20230125474A1

公开(公告)日：2023-04-27

申请号：US17950631

申请日：2022-09-22

Applicant: NGK INSULATORS, LTD.

Inventor： Ryo ONISHI ,  Kaoru SHIBUTANI

IPC: G01N27/409 ,  G01N33/00 ,  G01N27/407

Abstract: A sensor element for detecting a target gas to be measured in a measurement-object gas includes: an element body including an oxygen-ion-conductive solid electrolyte layer; and a protective layer covering at least a part of a surface of the element body. The protective layer includes a porous material that has a pore inside; and, in the pore in the protective layer, a ratio (Lt/Lf) of a pore length (Lt) in a thickness direction perpendicular to the surface of the element body to a pore length (Lf) in a surface direction perpendicular to the thickness direction is 0.6 to 0.9.

公开(公告)号：US20240328900A1

公开(公告)日：2024-10-03

申请号：US18604644

申请日：2024-03-14

Applicant: NGK INSULATORS, LTD.

Inventor： Kaoru SHIBUTANI ,  Ryo ONISHI

IPC: G01M15/10 ,  G01N21/65

CPC classification number: G01M15/102 ,  G01N21/65

Abstract: A sensor element includes: an element body having a front end and a back end which are both ends in a longitudinal direction, a lateral face which is a face along the longitudinal direction, an outer lead section disposed on the lateral face; and a dense layer which covers part of the lateral face. The outer lead section has a first region which is covered at least in part by the dense layer. The first region contains zirconia. TM ratio is lower than 2, the TM ratio being a ratio Ht/Hm of a peak height Ht of T-phase to a peak height Hm of M-phase of zirconia in a Raman spectrum measured using Raman spectroscopy, and the dense layer has a thickness less than 11 μm.

公开(公告)号：US20240329022A1

公开(公告)日：2024-10-03

申请号：US18604653

申请日：2024-03-14

Applicant: NGK INSULATORS, LTD.

Inventor： Kaoru SHIBUTANI ,  Ryo ONISHI

IPC: G01N33/00 ,  G01N27/407 ,  G01N27/409 ,  G01N27/41 ,  G01N27/419

CPC classification number: G01N33/0063 ,  G01N27/4077 ,  G01N27/409 ,  G01N27/41 ,  G01N27/419

Abstract: A sensor element includes: an element body having a front end and a back end which are both ends in a longitudinal direction, and a lateral face which is a face in the longitudinal direction; an outer lead section disposed on the lateral face; a porous layer that covers part of the lateral face; and a dense layer that covers part of the lateral face and in contact with the porous layer on the front-end side and/or the back-end side, wherein the outer lead section has a low porosity region covered by the porous layer, and a high porosity region which is covered by the dense layer, in contact with the low porosity region, and has a higher porosity than the low porosity region.

公开(公告)号：US20240151685A1

公开(公告)日：2024-05-09

申请号：US18282046

申请日：2022-02-01

Applicant: NGK INSULATORS, LTD.

Inventor： Kaoru SHIBUTANI ,  Ryo ONISHI

IPC: G01N27/407 ,  G01N27/406 ,  G01M15/10 ,  G01N27/41

CPC classification number: G01N27/4072 ,  G01N27/4067 ,  G01N27/4074 ,  G01N27/4077 ,  G01M15/102 ,  G01N27/41

Abstract: Provided is a sensor element for use in measurement of the concentration of a predetermined gas component in a measurement target gas. The sensor element includes a plate-shaped element body and a protective layer. The element body includes a solid electrolyte layer having oxygen ion conductivity and a heater configured to heat the solid electrolyte layer. A protective layer is formed on at least one face of the element body. A surface of the protective layer has a surface roughness Ra of 8 μm or less and a surface waviness Wa of 6 μm or more.

公开(公告)号：US20240003841A1

公开(公告)日：2024-01-04

申请号：US18467042

申请日：2023-09-14

Applicant: NGK INSULATORS, LTD.

Inventor： Ryo ONISHI ,  Kaoru SHIBUTANI

IPC: G01N27/407 ,  G01N33/00 ,  G01N27/30 ,  G01N27/41

CPC classification number: G01N27/4077 ,  G01N27/41 ,  G01N27/304 ,  G01N33/0027

Abstract: A sensor element includes: an element body including an oxygen-ion-conductive solid electrolyte layer; and a protective layer that covers at least part of the element body and is a porous body having a plurality of pores thereinside. The standard deviation of the porosity of the protective layer is 2.3% or less.