Patent ID: 8685363

Claim:
An aluminum magnesium titanate honeycomb carrier for an exhaust gas-cleaning catalyst, wherein the material for the aluminum magnesium titanate honeycomb carrier is an aluminum magnesium titanate sintered product obtained by firing at from 1,000 to 1,700Â° C. a raw mixture comprising: 100 parts by mass, as calculated as oxides, of a mixture comprising a Mg-containing compound, an Al-containing compound and a Ti-containing compound in the same metal component ratio as the metal component ratio of Mg, Al and Ti in an aluminum magnesium titanate represented by the empirical formula Mg x Al 2(1âˆ’x) Ti (1+x) O 5 (wherein 0<xâ‰¦0.5); and from 1 to 10 parts by mass of an alkali feldspar represented by the empirical formula (Na y K 1âˆ’y )AlSi 3 O 8 (wherein 0<y<1); a remaining ratio Î± (%) of the aluminum magnesium titanate honeycomb carrier is higher than the remaining ratio Î± (%) of an aluminum titanate honeycomb carrier after both the aluminum magnesium titanate honeycomb carrier and the aluminum titanate honeycomb carrier are held at 1100Â° C. for 300 hrs, wherein the aluminum titanate honeycomb carrier is obtained by firing at 1400Â° C. a mixture of Î±-alumina and anatase-type titanium oxide and an alkali feldspar represented by (Na 0.6 K 0.4 )AlSi 3 O 8 ; and solid-solubilized Si +4 and Mg +2 sexivalent pairs are substituted for sexivalent Al +3 pairs in the crystal grains of the aluminum magnesium titanate honeycomb carrier to synergistically suppress diffusion of cations into the aluminum magnesium titanate honeycomb carrier and increase the thermal decomposition resistance of the aluminum magnesium titanate honeycomb carrier.