The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 2002
Filed:
Nov. 17, 1999
Lothar Diehl, Stuttgart, DE;
Karl-Hermann Friese, Leonberg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An insulation layer of a heating device for a sensor for determination of oxygen concentration in gas mixtures, in particular exhaust gasses of an internal combustion engine, is produced by applying a silicate-free insulation base material consisting only of barium oxide and/or strontium oxide with aluminum oxide to coat the heating device ( ) and then heating the heating device with the insulation base material applied to it to temperatures of about 1350° to 1600° C. to form the insulation layer ( ) by sintering. The sensor includes a Nernst measuring cell provided with a first electrode ( ) and a second electrode ( ) arranged in a solid electrolyte ( ). The insulation layer ( ) is arranged between the solid electrolyte ( ) and the heating device ( ).