| 摘要 |
PURPOSE:To obtain the uniform, stable characteristics of a sensor and to make it possible to display the stable characteristics for a long period, by using a specified perovskite type composite oxide as an electrode material. CONSTITUTION:An anode 2 and a cathode 3 are provided on a substrate of oxygen-ion conducive solid electrolyte. A porous gas diffused layer 6 is provided on the cathode 3. A seal 7, which does not transmit gas, is provided at the outer end surface. Thus, a burning control sensor, which detects a fuel ratio from the concentration of remaining oxygen in exhaust gas and the like, is formed. When the electrode, which is to become the cathode, is formed with a perovskite type composite oxide shown by the general formula I, uniform, stable sensor characteristics are obtained different from the case where platinum is used. The stable characteristics are displayed for a long time since the electrode is thermally stable. In the formula, Ln is La, Ce, Pr and Nd; Me is at least one element, which is selected among Ni, Fe, Mn, Cr and V; 0<=x<1; 0<=y<1; and delta is missing amount of oxygen. |
