A sensor element for sensing at least one characteristic of a measurement gas in a measurement gas space

摘要

A sensor element (10) for detecting the ratio of gas components in the measurement gas or the temperature of the measurement gas is proposed for detecting at least one characteristic of the measurement gas in the measurement gas space. The sensor element (10) includes at least one solid electrolyte layer (12) and at least one electrode (22) in contact with the solid electrolyte layer (12). The electrode (22) comprises at least one first layer (30) made of at least partially ceramic material and at least one second layer (32) produced from the ceramic material. The first layer (30) is opposite the solid electrolyte layer (12). The second layer (32) is on the side of the solid electrolyte layer (12). The ceramic material of the first layer (30) and the ceramic material of the second layer (32) include yttrium doped zirconium dioxide, particularly zirconium dioxide doped with yttrium oxide. Se of the first layerThe lamellar material shows a higher yttrium doping amount than the ceramic material of the second layer (32). The first layer (30) has a higher porosity than the second layer (32).