Gas sensor device based on metal oxide foam
US12422392B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2020 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Oct 24, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas sensing device is manufactured with three dimensionally connected metal oxide foam structure of large surface area and elongated channel pores within the three-dimensional porous structure for gas sensing applications, thereby increasing the surface area of the sensing layer and expediting sensitivity and sensor response. A gas sensor device includes the fabricated metal-oxide-foam sensing material attached via silver paste to platinum electrodes and ruthenium heater that are printed on low temperature co-fired ceramic substrate. This device will provide improved gas sensing performance with improved sensitivity and response time. Gas sensors including the metal oxide foam sensing material exhibit higher sensitivity to toxic gases such as ethanol and carbon monoxide due to the large surface area achieved from the porous three-dimensional structure providing increased chemical reaction sites and the larger porous channels allowing gases to easily pass, shortening the gas diffusion reaction path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.