Gas sensor
US10393696B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2017 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Sep 20, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/419
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.