Ceramic materials for 4-way and NOx adsorber and method for making same
AssigneeCorning Incorporated
InventorsSteven Bolaji Ogunwumi, Cameron Wayne Tanner
Life of this patent
Estimating the term…
Abstract
Disclosed are ceramic articles comprising a sintered phase ceramic composition containing, as expressed on a weight percent oxide basis: a(Al2TiO5)+b(ZrTiO4)+c(Y2O3)+d(YPO4) wherein “a, b, c, and d” represent weight fractions of each component such that (a+b+c+d)=1.00 and wherein 0.5<a≦0.95; 0≦b≦0.5, 0.0≦c≦0.10, and 0≦d≦0.5. Also disclosed are precursor batch compositions and methods for manufacturing the ceramic articles disclosed herein.
Claims15
A ceramic article, comprising a sintered phase non-silicate ceramic composition containing, as expressed on a weight percent oxide basis:
- a(Al2TiO5)+b(ZrTiO4)+c(Y2O3)+d(YPO4)
- wherein a, b, c, and d are weight fractions of each component such that (a+b+c+d)=1.00, and
- wherein 0.5<a≦0.95;
- 0≦b≦0.5, 0.0≦c≦0.10, and 0≦d≦0.5, and
- wherein the total porosity of the ceramic oxide composition is at least 40%, and
- wherein the sintered phase ceramic composition consists essentially of (a) aluminum titanate, zirconium titanate, and yttrium oxide, wherein 0.60≦a≦0.80 and 0.20≦b≦0.40 and 0.00≦c≦0.05, or (b) aluminum titanate and yttrium phosphate, wherein 0.5≦a≦0.95 and 0.05≦d≦0.5.
A ceramic article, comprising a sintered phase ceramic composition containing, as expressed on a weight percent oxide basis:
- a(Al2TiO5)+b(ZrTiO4)+c(Y2O3)+d(YPO4)
- wherein a, b, c, and d are weight fractions of each component such that (a+b+c+d)=1.00, and
- wherein 0.5≦a≦0.95;
- 0≦b≦0.5, 0.0≦c≦0.10, and 0.05≦d≦0.5, and
- wherein the sintered phase ceramic composition consists essentially of aluminum titanate and yttrium phosphate.
A ceramic article, comprising a sintered phase non-silicate ceramic oxide composition containing, as expressed on a weight percent oxide basis:
- a(Al2TiO5)+b(ZrTiO4)+c(Y2O3)+d(YPO4)
- wherein a, b, c, and d are weight fractions of each component such that (a+b+c+d)=1.00, and
- wherein 0.5<a≦0.95;
- 0≦b≦0.5, 0.0≦c≦0.10, and 0≦d≦0.5, and
- wherein the ceramic article further comprises an alkali catalyst washcoating, wherein the washcoating comprises potassium.
A ceramic article, comprising:
- an alkali catalyst washcoating;
- and
- a sintered phase non-silicate ceramic composition containing, as expressed on a weight percent oxide basis:
- a(Al2TiO5)+b(ZrTiO4)+c(Y2O3)+d(YPO4)
- wherein a, b, c, and d are weight fractions of each component such that (a+b+c+d)=1.00, and
- wherein 0.5<a≦0.95;
- 0≦b≦0.5,0.0≦c≦0.10, and 0≦d≦0.5, and
- wherein the total porosity of the ceramic oxide composition is at least 40%.
Dependencies are inferred from the claim text.