Invention Grant
- Patent Title: Gas sensor
-
Application No.: US15650017Application Date: 2017-07-14
-
Publication No.: US10393696B2Publication Date: 2019-08-27
- Inventor: Yusuke Todo , Mitsunobu Nakato , Hiroaki Yoto , Hiroki Ichikawa
- Applicant: DENSO CORPORATION
- Applicant Address: JP Kariya
- Assignee: DENSO CORPORATION
- Current Assignee: DENSO CORPORATION
- Current Assignee Address: JP Kariya
- Agency: Nixon & Vanderhye P.C.
- Priority: JP2016-140602 20160715
- Main IPC: G01N27/417
- IPC: G01N27/417 ; G01N27/403 ; G01N27/30 ; C22C5/04 ; G01N27/419

Abstract:
A gas sensor includes a sensor element. The sensor element includes; a solid electrolyte body that has oxygen ion conductivity and includes a first main surface exposed to a gas to be measured and a second main surface exposed to a reference gas; a sensor electrode that is provided on the first main surface and detects a specific gas component in the gas to be measured; and a reference electrode that is provided on the second main surface. The sensor electrode is made of a Pt—Rh alloy that contains 30 mass % to 70 mass % Pt and 70 mass % to 30 mass % Rh, when an overall noble metal component is 100 mass %. A variation amount of the Rh content of the Pt—Rh alloy from an outermost surface to a depth of 350 nm in a thickness direction of the sensor electrode is within a range of up to 10 mass %.
Public/Granted literature
- US20180017520A1 GAS SENSOR Public/Granted day:2018-01-18
Information query