Patent ID: 6325905
Filing Date: 2001-12-04
Classification: G01N

Abstract:
A solid electrolyte carbon dioxide gas sensor element comprising:a solid electrolyte layer;a work electrode layer formed on one side of the solid electrolyte layer and containing an electron conducting material and an auxiliary electrode material; anda reference electrode layer formed on the same side or the other side of the solid electrolyte layer and containing an electron conducting material, whereinthe work electrode layer further contains a rare earth metal oxide, wherein the rare earth metal oxide of the work electrode layer is at least one member selected from the group consisting of oxides represented by the following formulas: R.sup.1 O, R.sup.2 O.sub.2 and R.sup.3.sub.2 O.sub.3 wherein R.sup.1 is a divalent rare earth metal, R.sup.2 is a tetravalent rare earth metal and R.sup.3 is a trivalent rare earth metal.