| 摘要 |
PURPOSE:To retard deterioration of a catalyst by thermal and mechanical stress. CONSTITUTION:A perovskite type multiple oxide, a heat resistant oxide and a zirconia sol, ceria sol, yttoria sol or these mixed sol or a solid solution sol containing two or more of Zr, Ce, Y are added into a pure water and are stirred and mixed in a ball mill for 12 hours and the obtained slurry is applied to a cordierite heat resistant honeycomb carrier and is dried and calcined at 600 deg.C in an atmosphere for 3 hours to obtain the carrier uniformly coated with the perovskite multiple oxide and the heat resistant oxide. The carrier is impregnated with a palladium nitrate aq. solution, is dried and is calcined at 600 deg.C for 3 hours in an atmosphere. |
