Patent ID: 6656534
Filing Date: 2003-12-02
Classification: B28B,C04B,G01N

Abstract:
A method for manufacturing a gas sensing element which has a cup-shaped solid electrolytic body having a reference gas chamber formed therein, an inside electrode provided on an inner surface of said solid electrolytic body, and an outside electrode provided on an outer surface of the solid electrolytic body, said manufacturing method comprising:a step of forming a non-sintered element body having a predetermined shape from powdery raw material of said solid electrolytic body; a step of temporarily sintering said non-sintered element body to obtain a partially-sintered element body as a semi-finished product of said solid electrolytic body; a step of dipping an outer surface of said partially-sintered element body into a slurry, said slurry containing surface roughing powder including large and small grains which are mutually differentiated in grain size; and a step of completely sintering said partially-sintered element body with a rough slurry film coated thereon into said solid electrolytic body.