| 摘要 |
PURPOSE:To obtain a sensor superior in sensibility and responsiveness by painting the paste obtained by mixing the powder of a metallic oxide oxidizing HC to CO and the powder of a porous electrode forming material having semicatalytic ability and a binder on the gas side to be measured of a solid electrolyte and sintering said paste. CONSTITUTION:The paste-state material obtained by mixing and kneading the powder consisting of 10-40wt% SnO2, In2O3, etc. capable of oxidizing HC to CO and the balance a porous electrode material such as powder of Mg, Pt and the binder of the quantity equivalent to 0.5-2 times volume ratio per the total quantity of powder is painted on the measuring gas side 6 of a solid electrolyte cylinder 1, and paste made solely of electrode material is painted on the inner surface of the cylinder. Next the cylinder is calcined at the m.p. or less of the electrode material and the metallic oxide and at a temperature capable of sintering the electrode material to obtain the sensor. Thus the metallic oxide 4 is allowed to oxist in the vicinity of a 3-phase point of the porous electrode 3, the electrolyte 1 and a gas to be measured, and the sensor of low variation in sensibility is obtained. |
