Sensor element for detecting at least one property of a measuring gas in a measuring gas space, containing a ground, impregnated slip layer

Abstract

A method for manufacturing a sensor element for detecting (i) a gas component in a measuring gas or (ii) a temperature of the measuring gas includes: introducing at least one functional element into at least one slip at least once in such a way that a slip layer is applied to the functional element, the functional element including at least one solid electrolyte and at least one functional layer; sintering the slip layer on the functional element; grinding the slip layer at least in the area of the at least one functional layer; impregnating the slip layer; and thermally treating the impregnated slip layer.

1 - 14 . (canceled) 
     
     
         15 . A method for manufacturing a sensor element for detecting a gas component in a measuring gas or a temperature of the measuring gas, comprising:
 introducing at least one functional element at least once into at least one slip in such a way that a slip layer is applied to the functional element, the functional element including at least one solid electrolyte and at least one functional layer;   sintering the slip layer on the functional element;   grinding the slip layer at least in the area of the at least one functional layer;   impregnating the slip layer; and   thermally treating the impregnated slip layer.   
     
     
         16 . The method as recited in  claim 15 , wherein the functional element is introduced repeatedly into the slip. 
     
     
         17 . The method as recited in  claim 16 , further comprising:
 at least one drying process between the repeated introductions of the functional element into the slip.   
     
     
         18 . The method as recited in  claim 15 , wherein impregnation is carried out with the aid of at least one of a precious metal-containing solution and getter-containing solution. 
     
     
         19 . The method as recited in  claim 15 , wherein a cavity forming layer is applied to the functional element prior to introduction into the slip. 
     
     
         20 . The method as recited in  claim 19 , wherein the at least one slip layer, after sintering and grinding, has a thickness between 150 μm and 350 μm. 
     
     
         21 . The method as recited in  claim 15 , wherein the functional element is introduced into the slip in an unsintered state, and the functional element and the slip layer are sintered together. 
     
     
         22 . The method as recited in  claim 19 , wherein the functional element is introduced into the slip in a sintered state, and the slip layer is sintered on the functional element. 
     
     
         23 . A sensor element for detecting a gas component in a measuring gas or a temperature of the measuring gas, comprising:
 a functional element which includes at least one solid electrolyte and at least one functional layer; and   at least one impregnated slip layer on the functional element, wherein the slip layer is ground at least in the area of the at least one functional layer.   
     
     
         24 . The sensor element as recited in  claim 23 , wherein the at least one slip layer has a thickness between 150 μm and 350 μm. 
     
     
         25 . The sensor element as recited in  claim 23 , wherein the slip layer has an open porosity between 15% and 50%. 
     
     
         26 . The sensor element as recited in  claim 25 , wherein the slip layer has a porosity gradient increasing from a side of the slip layer facing the functional element in the direction of a side of the slip layer facing away from the functional element. 
     
     
         27 . The sensor element as recited in  claim 26 , wherein a cavity is provided between the slip layer and the functional element. 
     
     
         28 . The sensor element as recited in  claim 27 , wherein the functional element includes a layer structure having (i) at least one first electrode, (ii) at least one second electrode, and (iii) the solid electrolyte, wherein the solid electrode connects the first electrode and the second electrode, the second electrode being formed separately from the measuring gas space by at least one layer of the layer structure, and the second electrode being connected to the measuring gas space via at least one gas entry path which includes at least one gas entry hole in the layer structure, and wherein the cavity is situated between the gas entry hole and the slip layer.