Patent ID: 6793788
Filing Date: 2004-09-21
Classification: G01N

Abstract:
A method of fabricating a sensor element for an exhaust gas sensing device, said sensor comprising a sensing electrode and a reference electrode in ionic communication with an electrolyte, said method comprising:disposing a sensing electrode ink in ionic communication with the electrolyte, wherein the sensing electrode ink comprises an activator comprising silica and an oxide of an element and the element is selected from the group consisting of alkaline earth elements, rare earth elements, and combinations comprising at least one of the foregoing elements, and wherein the activator is not incorporated into the reference electrode, and wherein the sensing electrode ink comprises about 0.5 wt % to about 5 wt % of the activator, based upon a total solid content of the ink, and wherein the activator is composed of about 10 wt % to about 40 wt % of the silica and about 60 wt % to about 90 wt % of the element oxide, based upon the total weight of the activator.