HONEYCOMB CARRIER FOR EXHAUST GAS-CLEANING CATALYST AND PROCESS FOR ITS PRODUCTION

摘要

A honeycomb carrier for an exhaust gas clarification catalyst, characterized in that it comprises, as the material thereof, an aluminum magnesium titanat e sintered product produced by a method comprising firing, at 1000 to 1700 ~C, a formed product from a raw material mixture containing 100 parts by mass in terms of oxides of a mixture containing an Mg-containing compound, an Al - containing compound and a Ti-containing compound in a metal component ratio between Mg, Al and Ti being the same as that in aluminum magnesium titanate represented by the empirical formula: MgxAl2(1+x)Ti(1+x)O5 [wherein, 0 < x < 1] and 1 to 10 parts by mass of alkali feldspar represented by the empirical formula:(NayK1-y)AlSi3O8 [wherein 0 <= y <= 1]; and a method for produ cing the honeycomb carrier. The above carrier is excellent in the resistance to heat and thermal shock, mechanical strength and the resistance to thermal decomposition, and exhibits great resistance to the corrosion by a catalyst carried thereby, and thus can be suitably used with stability for a long period of time as a carrier for use in a clarification catalyst, in particular, for an automobile exhaust gas containing NOx and the like.