Gas sensor
First Claim
1. A gas sensor for detecting a physical property of a measuring gas, comprising:
- a first solid electrolyte layer;
a second solid electrolyte layer; and
a diffusion barrier arranged between the first solid electrolyte layer and the second solid electrolyte layer, wherein the diffusion barrier has a portion with a concave cross-sectional profile between the first and the second solid electrolyte layers.
1 Assignment
0 Petitions
Accused Products
Abstract
A gas sensor is described for detecting a physical property of a measuring gas, including detecting the oxygen concentration in the measuring gas. The gas sensor includes a sensor element having a diffusion barrier, which is arranged between a first solid electrolyte layer and a second solid electrolyte layer. The diffusion barrier has a necked-down portion, i.e., a concave profile, between the first and the second solid electrolyte layer. Accordingly, a first area, which the diffusion barrier occupies in a plane which lies between the side of the first solid electrolyte layer (facing the diffusion barrier) and the side of the second solid electrolyte layer (facing the diffusion barrier), is smaller than a second area on which the diffusion barrier covers the first or the second solid electrolyte. In order to manufacture the sensor element, a first layer made of a paste containing a pore-forming material is applied onto a blank foil, and after that, a second layer made of a paste containing a pore-forming material is applied.
-
Citations
23 Claims
-
1. A gas sensor for detecting a physical property of a measuring gas, comprising:
-
a first solid electrolyte layer;
a second solid electrolyte layer; and
a diffusion barrier arranged between the first solid electrolyte layer and the second solid electrolyte layer, wherein the diffusion barrier has a portion with a concave cross-sectional profile between the first and the second solid electrolyte layers. - View Dependent Claims (2, 3, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
4. A gas sensor for detecting a physical property of a measuring gas, comprising:
-
a first solid electrolyte layer;
a second solid electrolyte layer; and
a diffusion barrier arranged between the first solid electrolyte layer and the second solid electrolyte layer, wherein the diffusion barrier includes a first area and a second area, the first area lying in a first plane positioned between the first and second solid electrolyte layers, the second area lying in a second plane between the first and second solid electrolyte layers and covering one of the first and the second solid electrolyte layers, and wherein the first area is smaller than the second area. - View Dependent Claims (5, 6, 7)
-
-
20. A method for manufacturing a planar sensor element in a gas sensor for detecting a physical property of a measuring gas, comprising:
-
applying a first layer made of a paste containing a pore-forming material onto a first blank foil;
applying a second layer made of the paste containing a pore-forming material onto the first layer;
laminating the first blank foil together with a second blank foil to create a composite; and
sintering the composite to volatilize the pore-forming material in the first layer and the second layer, whereby the first layer and second layer form a diffusion barrier. - View Dependent Claims (21, 22, 23)
-
Specification