Abstract:
The invention relates to a sensor element (10) for detecting at least one property of a measured gas in a measured gas chamber, in particular in order to detect a proportion of a gas component in the measured gas or a temperature of the measured gas. The sensor element (10) comprises at least one solid electrolyte layer (12, 14, 16). The solid electrolyte layer (12, 14, 16) has at least one via hole (42). The sensor element (10) further comprises a conductive element (48) which produces an electrically conductive connection from an upper face (18, 32) of the solid electrolyte layer (12, 14, 16) to a lower face of the solid electrolyte layer (12, 14, 16) through the via hole (42). The solid electrolyte layer (12, 14, 16) is electrically insulated in the via hole (42) by the conductive element (48) by means of an insulating element (44). At least one opening region (50) of the via hole (42) is stabilized against phase conversions by means of a stabilizing element (52). The stabilizing element (52) is at least partly made of a material which has a noble metal and an element selected from the group consisting of: V, Nb, Ta, Sb, Bi, Cr, Mo, and W. The invention further relates to a method for producing a sensor element (10) for detecting at least one property of a measured gas in a measured gas chamber.
Abstract:
The invention relates to a sensor element, in particular for establishing a physical property of a gas, in particular for establishing the concentration of a gas component or the temperature of an exhaust gas of an internal combustion engine, the sensor element (20) comprising a first solid electrolyte layer (21), the first solid electrolyte layer (21) comprising an interlayer connection hole (25), the sensor element (20) further comprising a conductor (41) producing an electrically conductive connection from the top side (211) of the first solid electrolyte layer (21) to the bottom side (212) of the first solid electrolyte layer (21) through the interlayer connection hole (25), and the first solid electrolyte layer (21) being electrically insulated from the conductor (41) by an insulator (42) in the interlayer connection hole (25), characterized in that the wall (251) of the interlayer connection hole (25) comprises a chamfer (51), and to a method for producing a sensor element.