Patent ID: 6676818
Filing Date: 2004-01-13
Classification: G01N

Abstract:
An exhaust gas probe, comprising:a measuring electrode; a reference electrode; a solid electrolyte layer separating the electrodes, the solid electrolyte layer being formed substantially of ZrO2; a first sealingly sintered layer formed of an Al2O3-containing material, the Al2O3-containing material containing less than 50 ppm of sodium, the first sealingly sintered layer including pores, wherein the pores are formed by a pore-forming material added to the Al2O3-containing material before sintering and wherein the pore-forming material is not present after the sintering; and a circuit-board conductor layer configured to electrically heat the solid electrolyte layer, the circuit-board conductor layer being firmly connected to the solid electrolyte layer via the first sealingly sintered layer.