Patent ID: 6776895
Filing Date: 2004-08-17
Classification: G01N

Abstract:
A method of producing a gas sensor element which includes a solid electrolyte body, a target gas electrode provided on a surface of said said solid electrolyte body so as to be exposed to a gas to be measured, and a reference gas electrode provided on a surface of said solid electrolite body so as to be exposed to a reference gas, the method comprising:exposing said gas sensor element to a gas atmosphere containing at least one of a hydrocarbon gas, a CO gas, and a H2 gas at 400 to 900Â° C.; and applying an ac voltage to said target gas electrode and said reference gas electrode, wherein each of said target gas electrode and the reference gas electrode being is made up of a plurality of crystal grains having grain boundaries betweenn adjacent ones of said plurality of crystal grains such that a total length of the grain boundries over each of said gas electrode and said reference gas electrode is 100 &mgr;m or more in a respective electrode surface area of 1000 &mgr;m2.