Cordierite aluminum magnesium titanate compositions and ceramic articles comprising same
First Claim
Patent Images
1. A ceramic article, comprising:
- a pseudobrookite phase comprising predominately alumina, magnesia, and titania;
a second phase comprising cordierite; and
a sintering aid, comprising;
(i) at least one of a calcium oxide and strontium oxide, and(ii) at least one of a yttrium oxide, a lanthanum oxide, and a cerium oxide;
wherein the ceramic article comprises a total porosity of at least 40% by volume, a median pore size d50 in a range of 10 μ
m to 30 μ
m, and a composition expressed on an oxide basis of a(Al2TiO5)+b(MgTi2O5)+c(2MgO.2Al2O3.5SiO2)+d(3Al2O3.2SiO2)+e(MgO.Al2O3)+f(2MgO.TiO2)+g(CaO)+h(SrO)+i(X)+j(Fe2O3.TiO2)+k(TiO2)+1(Al2O3), wherein X is at least one of CeO2, Y2O3, and La2O3, and a, b, c, d, e, f, g, h, i, j, k, and l are weight fractions of each component such that (a+b+c+d+e+f+g+h+i+j+k+1)=1.00, and wherein 0.3≤
a≤
0.75, 0.075≤
b≤
0.3, 0.02≤
c≤
0.5, 0.0≤
d≤
0.4, 0.0≤
e≤
0.25, 0.0≤
f≤
0.1, 0.0≤
g≤
0.01, 0.0≤
h≤
0.02, 0.0015≤
(g+h), 0.0≤
i≤
0.05, 0.0≤
j≤
0.03, 0.0 k 0.2, and 0.0≤
1≤
0.1.
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Abstract
Disclosed are ceramic bodies comprised of composite cordierite aluminum magnesium titanate ceramic compositions and methods for the manufacture of same.
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Citations
4 Claims
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1. A ceramic article, comprising:
-
a pseudobrookite phase comprising predominately alumina, magnesia, and titania; a second phase comprising cordierite; and a sintering aid, comprising; (i) at least one of a calcium oxide and strontium oxide, and (ii) at least one of a yttrium oxide, a lanthanum oxide, and a cerium oxide; wherein the ceramic article comprises a total porosity of at least 40% by volume, a median pore size d50 in a range of 10 μ
m to 30 μ
m, and a composition expressed on an oxide basis of a(Al2TiO5)+b(MgTi2O5)+c(2MgO.2Al2O3.5SiO2)+d(3Al2O3.2SiO2)+e(MgO.Al2O3)+f(2MgO.TiO2)+g(CaO)+h(SrO)+i(X)+j(Fe2O3.TiO2)+k(TiO2)+1(Al2O3), wherein X is at least one of CeO2, Y2O3, and La2O3, and a, b, c, d, e, f, g, h, i, j, k, and l are weight fractions of each component such that (a+b+c+d+e+f+g+h+i+j+k+1)=1.00, and wherein 0.3≤
a≤
0.75, 0.075≤
b≤
0.3, 0.02≤
c≤
0.5, 0.0≤
d≤
0.4, 0.0≤
e≤
0.25, 0.0≤
f≤
0.1, 0.0≤
g≤
0.01, 0.0≤
h≤
0.02, 0.0015≤
(g+h), 0.0≤
i≤
0.05, 0.0≤
j≤
0.03, 0.0 k 0.2, and 0.0≤
1≤
0.1. - View Dependent Claims (2, 3, 4)
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Specification