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
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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.
Claims19
A porous non-silicate ceramic article comprised of a 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 composition comprises zirconium titanate or yttrium phosphate, and
- wherein the total porosity of the ceramic oxide composition is at least 40%.
A porous non-silicate ceramic article comprised of a 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 composition consists essentially of aluminum titanate and yttrium phosphate.
A porous non-silicate ceramic article comprising a 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, and
- wherein the composition comprises zirconium titanate or yttrium phosphate.
An exhaust gas filter comprising a porous non-silicate ceramic body comprised of a 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 composition comprises zirconium titanate or yttrium phosphate.
A porous non-silicate ceramic article comprised of:
- a 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 an alkali catalyst washcoating containing potassium, wherein the composition has a coefficient of thermal expansion in at least one direction that is less than or equal to 20.0×10−7/° C. across the temperature range of from 25° C. to 1000° C. after aging in steam at 850° C. for 10 hours.
A porous non-silicate ceramic article comprised of:
- a 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 an alkali catalyst washcoating.
Dependencies are inferred from the claim text.