| 摘要 |
PURPOSE:To prevent sintering and to increase the activity of a catalyst by alternately laminating corrugated metal sheets and flat metal sheets to form a carrier, fixing alumina wash coats each consisting of two or more layers on the surfaces of the sheets of the carrier and impregnating a catalytic component into the outermost layers. CONSTITUTION:Corrugated metal sheets 1 and flat metal sheets 2 are alternately laminated to form a metal carrier. Two-layered alumina wash coats each consisting of a base coat 3 and an overcoat 4 are fixed on the surfaces of the sheets 1, 2 of the carrier and a catalytic component such as platinum or rhodium is impregnated mainly into the overcoats 4 and supported to produce a catalyst for purifying exhaust gas. Since the outermost layers of the alumina wash coats have a uniform thickness, the density of the catalytic component impregnated mainly into the outermost layers is made uniform.
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