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The present invention describes a high porosity (% P≧45%), refractory, ceramic article comprising a cordierite ceramic phase and at least about 0.1 wt. % of a rare earth oxide, such as yttrium oxide or lanthanum oxide. When compared to typical high-porosity cordierite articles, the articles of the p

The present invention describes a high porosity (% P≧45%), refractory, ceramic article comprising a cordierite ceramic phase and at least about 0.1 wt. % of a rare earth oxide, such as yttrium oxide or lanthanum oxide. When compared to typical high-porosity cordierite articles, the articles of the present invention may exhibit relatively high strength, relatively low microcracking, relatively high strain tolerance (MOR/E), and/or relatively high thermal shock resistance (TSP).

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1. A ceramic honeycomb article, comprising: a predominant cordierite ceramic phase and at least about 0.1 wt. % of a rare earth oxide containing within the microstructure of the ceramic;a total porosity (% P) wherein % P≧45%;ERatio 1000≦1.05, wherein ERatio 1000=E1000° C./ERT; andCTE≦15×10−7/° C. fr

1. A ceramic honeycomb article, comprising: a predominant cordierite ceramic phase and at least about 0.1 wt. % of a rare earth oxide containing within the microstructure of the ceramic;a total porosity (% P) wherein % P≧45%;ERatio 1000≦1.05, wherein ERatio 1000=E1000° C./ERT; andCTE≦15×10−7/° C. from 25° C.-800° C.; andΔαmc less than 2.5,wherein at least a portion of the rare earth oxide is contained in an intercrystalline glass phase. 2. The ceramic honeycomb article of claim 1, further comprising: % P≧50%. 3. The ceramic honeycomb article of claim 1, further comprising: % P≧55%. 4. The ceramic honeycomb article of claim 1, further comprising: % P≧60%. 5. The ceramic honeycomb article of claim 1, further comprising a median pore size between 1-40 microns. 6. The ceramic honeycomb article of claim 1, further comprising: ERatio 1000≦1.00. 7. The ceramic honeycomb article of claim 1, further comprising: ERatio 1000≦0.95. 8. The ceramic honeycomb article of claim 1, further comprising: ERatio 1000<0.90. 9. The ceramic honeycomb article of claim 1, further comprising: ERatio 1000≦0.85. 10. The ceramic honeycomb article of claim 1, further comprising: Δαmc less than 1.0. 11. The ceramic honeycomb article of claim 1, further comprising: PCF≧50% wherein PCF is a pore connectivity factor of the honeycomb article and PCF=% P/db wherein db=(d90−d10)/d50. 12. The ceramic honeycomb article of claim 11, further comprising: PCF≧70%. 13. The ceramic honeycomb article of claim 11, further comprising: PCF≧90%. 14. The ceramic honeycomb article of claim 1, further comprising: MOR/E≧0.125% wherein MOR is the modulus of rupture strength of a cellular sample, and E is an elastic modulus of a cellular sample at room temperature. 15. The ceramic honeycomb article of claim 14, further comprising: MOR/E≧0.150%. 16. The ceramic honeycomb article of claim 14, further comprising: MOR/E≧0.175%. 17. The ceramic honeycomb article of claim 1, further comprising: CTE≦13×10−7/° C. from 25° C.-800° C. 18. The ceramic honeycomb article of claim 1, further comprising: CTE≦10×10−7/° C. from 25° C.-800° C. 19. The ceramic honeycomb article of claim 1, further comprising: TSP≧600° C. wherein TSP=MOR/[(E)(CTE500-900)], MOR is a modulus of rupture of a cellular sample, E is a room temperature elastic modulus of a cellular sample, and CTE500-900 is the coefficient of thermal expansion measured from 500° C.-900° C. 20. The ceramic honeycomb article of claim 19, further comprising: TSP≧700° C. 21. The ceramic honeycomb article of claim 19, further comprising: TSP≧800° C. 22. The ceramic honeycomb article of claim 19, further comprising: TSP≧900° C. 23. The ceramic honeycomb article of claim 19, further comprising: TSP≧1000° C. 24. The ceramic honeycomb article of claim 1, further comprising: % P≧55%,≧400 cpsi,twall≦153 μm wherein twall is a wall thickness of the honeycomb article, andd50≦10 μm. 25. The ceramic honeycomb article of claim 24, further comprising: % P≧55%,≧400 cpsi,twall≦153 μm, andd50≦5 μm. 26. The ceramic honeycomb article of claim 1, further comprising: % P≧50%, andd50≧7 μm. 27. The ceramic honeycomb article of claim 1, wherein the rare earth oxide is selected from a group consisting of yttrium oxide, lanthanum oxide, and combinations thereof. 28. The ceramic honeycomb article of claim 1, wherein the predominant cordierite ceramic phase comprises a compound having a formula [A]x[M]y[T]zO18, where A is selected from a group consisting of alkali, alkaline earth, rare earth elements, CO2, H2O, and combinations thereof; M is selected from a group consisting of Mg, Fe, Mn, Co, and combinations thereof; T is selected from a group consisting of Al, Si, Ga, Ge, and combinations thereof; 0≦x≦1.0; 1.9≦y≦2.1; and 8.9≦z≦9.1. 29. The ceramic honeycomb article of claim 28, wherein 0≦x≦0.05; 1.98≦y≦2.02; and 8.98≦z≦9.02. 30. The ceramic honeycomb article of claim 28, wherein M consists essentially of Mg, and T is selected from a group consisting essentially of Al, Si, and combinations thereof. 31. The ceramic honeycomb article of claim 1, further comprising: 0.1 wt. % to 5.0 wt. % rare earth oxide. 32. The ceramic honeycomb article of claim 31, further comprising: 0.2 wt. % to 3.0 wt. % rare earth oxide. 33. The ceramic honeycomb article of claim 31, further comprising: 0.4 wt. % to 2.0 wt. % rare earth oxide. 34. A ceramic honeycomb article, comprising: a total porosity (% P) wherein 50%≦% P≦70%,a median pore size of 3-30 microns,the article containing a cordierite-type phase including a compound having a formula [A]x[M]y[T]ZO18, where A is selected from a group consisting of alkali elements, alkaline earth elements, rare earth elements, CO2, H2O, and combinations thereof; M is selected from a group consisting of Mg, Fe, Mn, Co, and combinations thereof; T is selected from a group consisting of Al, Si, Ga, Ge, and combinations thereof; 0≦x≦1.0; 1.9≦y≦2.1; and 8.9≦z≦9.1; and 0.1-5.0 wt. % of a rare earth oxide,ERatio 1000≦1.05, wherein ERatio 1000=E1000° C./ERT;CTE≦15×10−7/° C. from 25° C.-800° C.; andΔαmc less than 2.5,wherein at least a portion of the rare earth oxide is contained in an intercrystalline glass phase. 35. The ceramic article of claim 34, further comprising: a cordierite-type phase comprising Mg2Al4Si5O18, and0.1-5.0 wt. % of a rare earth oxide selected from a group consisting of yttrium oxide, lanthanum oxide, and combinations thereof.