| 摘要 |
PURPOSE:To obtain a solid electrolyte body for oxygen sensor having improved thermal shock resistance, by forming sintered body of perfectly stabilized sirconia in the crystal structue having only cubic phase and specifying the average grain diameter of its surface. CONSTITUTION:Sintered body of perfectly stabilized zirconia through mixing the stabilizer such as yttria, is formed into the crystal structure composed of only cubic phase having <=5mu average grain diameter of the surface. Only cubic phase is detected in said sintered body even in pulverized state. Adding of the stabilizer is e.g. 7-10mol% in this method and termperature is suitably selected. By said method, the solid electrolyte body having improved strength of thermal shock resistance and a superior oxygen ion conductivity, can be obtained. |
