| 摘要 |
PURPOSE:To obtain a catalyst for automoble exhaust gas which has a high heat- resisting property, by dipping a metal fiber woven fabric of stainless steel or the like in an alumina-sol containing colloidal alumina and by drying the fabric and treating it with heat. CONSTITUTION:Metal fibers, which are made of ferrite or austenite stainless steel or heat-resisting steel and normally have a diameter of 40mu or less, are dipped in an alumina sol containing colloidal alumina. The metal fibers are then dried by a drier and treated with heat in a heating furnace. This results in providing a catalyst in which activated alumina coating layers are carried between the fibers of a metal fiber woven fabric and on its surface. The catalyst has a small weight and a high heat-resisting property and is used to change the harmful constituents of automobile exhaust gas into unharmful ones. |
