Sensor element with catalytically active layer and method for the production thereof
OwnerRoland Stahl, Gerhard Hoetzel +3inventors
InventorsRoland Stahl, Gerhard Hoetzel, Harald Neumann, Johann Riegel, Lothar Diehl
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Abstract
The invention describes a sensor element for determining the concentration of gas components in gas mixtures, in particular in exhaust gases of combustion engines. It includes at least one measured gas space (13) and at least one gas inlet opening (17) through which the gas mixture is conveyable to the measured gas space (13), and at least one diffusion barrier (12) arranged between the gas inlet opening (17) and measured gas space (13). The diffusion barrier (12) includes at least one layer (14, 14a, 14b) of catalytically active material for establishing equilibrium in the gas mixture.
Claims12
A sensor element constructed in layer form for determining the concentration of gas components in gas mixtures, in particular in exhaust gases of combustion engines, comprising at least one measured gas space and at least one gas inlet opening through which the gas mixture is conveyable to the measured gas space, and at least one diffusion barrier arranged between the gas inlet opening and measured gas space, the measured gas space and the diffusion barrier being arranged in a layer plane between a first and a second solid electrolyte layer,
- wherein the diffusion barrier (12) has at least one layer (14, 14a, 14b) of catalytically active material for establishing equilibrium in the gas mixture.
The sensor element as recited in one of the preceding claims, wherein the layer (14, 14a, 14b) of catalytically active material contains a component that removes sulfur oxides from the gas mixture.
Dependencies are inferred from the claim text.