| 摘要 |
PURPOSE:To provide an oxygen concentration sensor which has excellent low- temperature activity and oxygen concentration detecting ability and such an oxygen concentration detecting section that the electrodes of the section are hardly stripped off. CONSTITUTION:In the objective sensor provided with a pair of electrodes on each side of a sensor element l composed of an oxygen ion conductive solid electrolytic ceramic, each pair of electrodes is composed of an oxygen concentration detecting electrode section and wiring electrode section 3. The electrode section 2 is substantially formed by molding a mixture of 20-80wt.% platinum powder and 20-80wt.% ceramic powder of the same system of a solid electrolytic ceramic and has a porosity of 10-20%. A material which is high in platinum content, has a compact constitution, and readily adheres to the element 1 is used for the electrode section 3. |
