| 摘要 |
PURPOSE: To provide a filter for purifying exhaust gas in which the purification capacity can be improved, and the pressure loss can be reduced, and further provide its manufacturing method. CONSTITUTION: In manufacturing a filter 59 for purifying exhaust gas, the surface of a porous base material 5 is coated with a mixture of ceramic powder and a through hole forming material, the product is burned to sinter the ceramic powder to form a coating layer 1, and the hole forming material is eliminated by burning to form through holes 10 in the coating layer 1. The filter has a coating layer l which is formed on the surface of the porous base material 5 and carries a catalyst 2 for purifying exhaust gas. The coating layer 1 has through holes penetrating from the surface of the layer 1 to the base material 5. It is preferable that the coating layer 1 is formed not only on the surface of the base material 5 but also on the surface of a pore 50 inside the base material 5. |
