公开(公告)号：US20200309728A1

公开(公告)日：2020-10-01

申请号：US16819921

申请日：2020-03-16

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke WATANABE ,  Shiho IWAI

IPC: G01N27/409 ,  G01N27/406 ,  G01N27/419 ,  G01N27/41 ,  G01N27/30 ,  G01N27/407

Abstract: A sensor element includes an element body including an oxygen-ion-conductive solid electrolyte layer, the element body having a longitudinal direction, a measurement electrode disposed in the element body, a reference electrode disposed in the element body so as to come into contact with a reference gas, and a heater configured to heat the solid electrolyte layer. A center of gravity of the reference electrode overlaps the measurement electrode as viewed in a thickness direction of the solid electrolyte layer. A length of each of the reference electrode and the measurement electrode in a front-rear direction is less than or equal to 1.1 mm, the front-rear direction being a direction along the longitudinal direction of the element body. An area of the reference electrode as viewed in the thickness direction is greater than or equal to 1.0 mm2.

公开(公告)号：US20180284057A1

公开(公告)日：2018-10-04

申请号：US15938242

申请日：2018-03-28

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke WATANABE ,  Shiho IWAI

IPC: G01N27/41 ,  G01N27/407 ,  G01N27/30 ,  G01N27/406

Abstract: A sensor element includes a layered body that includes a measurement-object gas flowing portion which a measurement object gas is introduced and flowed in and a reference electrode that is formed inside of the layered body and a reference gas introducing layer made of a porous material that introduces a reference gas being used as a standard for detection of a specific gas concentration in the measurement-object gas and that flows the reference gas to the reference electrode, the reference gas introducing layer including an inlet portion serving as an inlet of the reference gas and one or more gas flowing spaces provided over a region from the inlet portion to the reference electrode in a direction in which the reference gas is flowed.

公开(公告)号：US20170284958A1

公开(公告)日：2017-10-05

申请号：US15469852

申请日：2017-03-27

Applicant: NGK INSULATORS, LTD.

Inventor： Atsushi WATANABE ,  Takashi SUZUKI ,  Shuichi OZAWA ,  Hirohito KIYOTA ,  Satoko MORIYAMA ,  Shiho IWAI

IPC: G01N27/407

CPC classification number: G01N27/4077 ,  G01N27/4074

Abstract: A sensor element 101 includes an element main body 101a that includes oxygen ion-conductive solid electrolyte layers (1 to 6), and a porous protective layer 90 that covers at least part of the element main body 101a. The porous protective layer 90 includes a porous inner protective layer 92 and a porous outer protective layer 91 disposed on the outer side of the inner protective layer 92 and having a smaller average pore diameter than the inner protective layer 92.