Ceramic body based on aluminum titanate

A diesel particulate filter comprising an end-plugged, wall-flow honeycomb filter ceramic body composed of a (Al2O3.TiO2)+b(CaO.Al2O3.2SiO2)+c(SrO.Al2O3.2SiO2)+d(BaO.Al2O3.2SiO2)+e(3Al2O3.2SiO2)+f(Al2O3)+g(SiO2)+h(Fe2O3.TiO2)+i(MgO.2TiO2), wherein a, b, c, d, e, f, g, h, and i are weight fractions of each component such that (a+b+c+d+e+f+g+h+i)=1, wherein 0.5<a≦0.95;

• 0≦b≦0.5;
• 0≦c≦0.5;
• 0≦d≦0.5;
• 0<e≦0.5;
• 0≦f≦0.5;
• 0≦g≦0.1;
• 0≦h≦0.3;
• 0≦i≦0.3;
• b+d>0.01.

A method of making an aluminum titanate-based ceramic body comprising:

• (a) formulating a batch of inorganic raw material components including sources of silica, alumina, strontium, barium, calcium, titania, and/or iron oxide together with organic processing components including plasticizers, lubricants, binders, and water as solvent,
• (b) mixing the batch of inorganic and organic components to form a homogeneous and plasticized mixture;
• (c) shaping the plasticized mixture into a green body;
• (d) heating the green body at a temperature and for a time to develop a ceramic composed of a (Al2O3.TiO2)+b(CaO.Al2O3.2SiO2)+c(SrO.Al2O3.2SiO2)+d(BaO.Al2O3.2SiO2)+e(3Al2O3.2SiO2)+f(Al2O3)+g(SiO2)+h(Fe2O3TiO2)+i(MgO.2TiO2) where a, b, c, d, e, f, g, h, and i are weight fractions of each component such that (a+b+c+d+e+f+g+h+i)=1, wherein 0.5<a≦0.95;
• 0≦b≦0.5;
• 0≦c≦0.5;
• 0≦d≦0.5;
• 0<e≦0.5;
• 0≦f≦0.5;
• 0≦g≦0.1;
• 0≦h≦0.3;
• 0≦i≦0.3;
• b+d>0.01.