| 摘要 |
PROBLEM TO BE SOLVED: To provide high ability for treating carbon particles in exhaust gas and improved durability by a method wherein fibers of high temperature heat resistant stainless steel are formed into a web and an alumina film is formed thereon to form a high temperature heat resistant stainless steel fiber sintered material, which material carries catalysts. SOLUTION: A high temperature heat resistant stainless steel fiber sintered material 2 has a porous structure, wherein high temperature heat resistant stainless steel fibers 20 are oriented randomly and intersections between the fibers are welded to one another as shown in Fig. (a), and each fiber 20 has a nearly square cross section perpendicular to axial direction as shown in Fig. (b) and a thin alumina film 21 with uniform thickness is deposited on the surfaces of the fibers. The film 21 is formed so as to surround a cross contact part 200 of the fibers 20, 20 as shown in Fig. (c), whereby a metallic touch is produced in the part 200. Thus, in the material 2, a resistance heating circuit state, which is uniform as a whole, is constituted. Further, a catalyst layer 4 is provided on the surface of the film 21. |
