Gas sensor element

Details Gas sensor element Gas sensor element

2011-01-11

2011-01-11

Nguyen, Nam X (Department: 1795)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C204S424000, C204S428000, C204S432000, C205S783500, C205S784500, C205S785000, C073S023310

Reexamination Certificate

active

07867370

ABSTRACT:
A gas sensor element has a solid electrolyte body of oxygen ionic conductivity, a target gas electrode and a reference gas electrode formed on both surfaces of the solid electrolyte body, respectively, a porous diffusion resistance layer, and a catalyst support trap layer. The porous diffusion resistance layer covers the target gas electrode and through which target gases to be measured are passing. The catalyst support trap layer is formed on the outer surface of the porous diffusion resistance layer and supports noble metal catalyst. In the gas sensor element, the noble metal catalyst is made of platinum, rhodium, palladium supported in the catalyst support trap layer. In particular, an addition amount of palladium in the total amount of the noble metal catalyst is within a range of 2 to 65 wt %.

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