Sensor element, in particular a temperature sensor
AssigneeRobert Bosch GmbH
InventorsHeinz Geier, Gert Lindemann, Friederike Lindner, Thomas Brinz, Ulrich Eisele
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Abstract
A sensor element, especially a temperature sensor (5) is proposed, having a sensitive area (11), whose electrical resistance changes under the influence of a temperature to which the sensitive area (11) is exposed. In this case, sensitive area (11) has a glass ceramic fusion (15) of a starting material containing at least one component which is furnished at least substantially with a surface metallization. The proposed temperature sensor (5) is especially suitable for use at temperatures in excess of 1000° C., at which it shows resistance characteristics like that of a platinum resistor.
Claims1
A sensor element, comprising:
- a sensitive area having an electrical resistance that changes under an influence of a temperature to which the sensitive area is exposed;
- wherein the sensitive area includes a glass ceramic fusion of a starting material containing at least one component that is at least substantially supplied with a surface metallization, and wherein the starting powder contains 38 weight % to 48 weight % SiO2, 15 weight % to 19 weight % Al2O3, 4.5 weight % to 10 weight % TiO2, 0.1 weight % to 1.5 weight % Na2O, 0.1 weight % to 1.5 weight % K2O, and 23 weight % to 30 weight % CaO.
Dependencies are inferred from the claim text.