公开(公告)号：US10788443B2

公开(公告)日：2020-09-29

申请号：US15556090

申请日：2016-03-01

Applicant: DENSO CORPORATION

Inventor： Hironobu Shimokawa ,  Toshihiko Harada ,  Kazuki Yagi

IPC: G01N27/407 ,  C04B35/486 ,  F01N11/00

Abstract: A gas sensor element having good sensitivity and responsiveness at low temperature, and a gas sensor are provided. The gas sensor element includes a solid electrolyte member made of an oxygen ion conductive ZrO2-based ceramic, and a reference gas-side electrode and a measuring gas-side electrode respectively provided on a surface and the other surface of the solid electrolyte member. The gas sensor includes the gas sensor element. The reference gas-side electrode and the measuring gas-side electrode are formed so as to face each other with the solid electrolyte member interposed therebetween, and are both made of a noble metal or a noble metal alloy. A mixed layer with an average thickness of 800 nm or less is formed between the solid electrolyte member and the reference gas-side electrode. The mixed layer contains a noble metal or a noble metal alloy and a ZrO2-based ceramic mixed with each other.

公开(公告)号：US10228342B2

公开(公告)日：2019-03-12

申请号：US14964632

申请日：2015-12-10

Applicant: DENSO CORPORATION

Inventor： Kiyomi Kobayashi ,  Kazuki Yagi ,  Makoto Noguchi

IPC: G01N27/407

Abstract: A gas sensor has a gas sensor element which has a solid electrolyte body, a reference electrode and a measuring electrode. The solid electrolyte body contains partially stabilized zirconia as a main component in which zirconia is stabilized by stabilizer agent. Particle boundary parts are formed between crystal particles made of the partially stabilized zirconia. The particle boundary parts are made of a metal element such as yttria derived from the stabilizer agent, an alumina component and a silica component. A total content of the alumina component and the silica component in the particle boundary parts in the solid electrolyte body is within a range of 0.01 mass % to 1 mass % in terms of oxide in the solid electrolyte body. A ratio of the alumina component to the silica component in the particle boundary parts 12 is within a range of 0.2 to 2.0 in terms of oxide.