Sealing element for a sensor element of a sensor and manufacturing method thereof

Abstract

The invention provides a sealing element for a sensor element of a sensor and a manufacturing method thereof. The sensor is used for sensing the characteristic of measuring gas in a measuring gas chamber. The sealing element is constructed for sealing the sensor element in a longitudinal hole of a housing of the sensor. The sealing element has at least one layer structure, wherein the layer structure comprises the components of at least one first layer, wherein the first layer comprises at least one ceramic material, the ceramic material at least comprises boron nitride and borone oxide, wherein the content of the borone oxide relative to the ceramic material is 2.0wt%-6.0wt% or 6.0wt%-10.0wt%; at least one another first layer and at least one another second layer, wherein the another first layer and the another second layer respectively comprise at least one oxide ceramic material, wherein the first layer is disposed between the another first layer and the another second layer, wherein the layers of the layer structure are squeezed to each other.

Description

Background technique [0001] Various sensor elements and methods are known from the prior art for sensing at least one property of a measurement gas in a measurement gas chamber. In principle, any physical and / or chemical property of the gas can be measured here, wherein one or more properties can be sensed. The invention is described below with reference in particular to the qualitative and / or quantitative sensing of the gas component content of a measurement gas, in particular with reference to the sensing of the oxygen content in a measurement gas. Such a sensor element can be configured, for example, as a so-called lambda probe, which is known, for example, from Konrad Reif (ed.) "Sensoren im Kraftfahrzeug", first edition 2010, pp. 160-165. [0002] Such sensor elements may be based on the use of determining the electrolytic properties of solids, ie on the ion-conducting properties of these solids. Such sensors can generally have seals. The seal can be manufactured from ...

AI Technical Summary

Problems solved by technology

Therefore, seals manufactured by tension machining can be very expensive

Production by means of extrusion with the use of adhesives can be complex and therefore also expensive due to the number of process steps

Additionally, the sealing effect will not be optimal for

Furthermore, sintered seals can have manufacturing-dependent density differences, which can lead to different qualities

And this can be problematic in the subsequent manufacturing process for regulating constant moisture content

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