| 摘要 |
<p>In a diesel particulate filter apparatus, the surface of the fiber of a ceramic fiber material (5) such as a silicon carbide fiber material is covered with a coating layer (6) made up of a Ba2In2O5, Ba3Y4O9 or BaLa2O4 compound having a brownmillerite structure (7) with an NOx -reducing action, and a glass layer (8). A filter body (4) is constituted of a nonwoven fabric which comprises the randomly laminated ceramic fiber material (5) with the coating layer (6) on the surface of the fiber thereof. Alternatively, the diesel particulate filter apparatus may be constituted of a filter body (24) made of a nonwoven fabric which comprises a randomly laminated ceramic fiber material (25), and a porous sinter (27) containing the above-mentioned compound, provided that the porous sinter (27) is disposed on the downstream side of the filter body (24). <IMAGE></p> |
