| 摘要 |
PROBLEM TO BE SOLVED: To provide a CO2 , gas sensor whose high adhesiveness resistant to a high-temperature and long-term history and to a heat cycle is obtained and which prevents a drop in its gas detection concentration by a method wherein a material whose adhesiveness to an electrode is constituted between a solid electrolyte and the electrode so as to be brought into close contact with the solid electrolyte by a sputtering method or the like. SOLUTION: A solid electrolyte 1 as a gas-sensor base material and a solid-state reference electrode 2 are pasted, they are heated up to 700 deg.C so as to be melted and bonded, and an ion conductive property is ensured between both. An adhesion material 10 whose adhesiveness to an AU electrode 3 is high is fixed to the side of the solid electrolyte 1 between the solid electrolyte 1 and the Au electrode 3 by a sputtering method or the like. The Au electrode 3 and the adhesion material 10 are melted and bonded so as to be fixed. An Au net 4 is brought into contact with the surface of the Au electrode 3, a Pt net 6 is brought into contact with the surface of the solid-state reference electrode 2, and an Au lead wire 5 and a Pt lead wire 7 are attached. By this constitution, the adhesiveness between the solid electrolyte 1 and the Au electrode 3 is enhanced sharply, their high adhesiveness is obtained not only at a production initial stage but also after a high-temperature and long-term history, and it is possible to prevent a drop in the gas detection concentration of a sensor. |
