Acid resistant ceramic materials, filter using the same, and preparation of them

A porous honeycomb comprising a porous ceramic material formed in multi-phase and having good resistance to heat, acid and base, the porous ceramic material consisting essentially of:

• oxides of Si, Al, and Ti;
• wherein the oxides comprise SiO2, Al2O3 and TixOy wherein x represents an integer of 1 to 3, and y represents an integer of 1 to 3 as a (first component)-(second component)-(third component) in the weight ratio of (5-60):(5-60):(5-20).

A filter for the purification of diesel engine exhaust gas comprising a porous ceramic material formed in multi-phase and having good resistance to heat, acid and base, the porous ceramic material consisting essentially of:

• oxides of Si, Al, and Ti;
• wherein the oxides comprise SiO2, Al2O3 and TixOy wherein x represents an integer of 1 to 3, and y represents an integer of 1 to 3 as a (first component)-(second component)-(third component) in the weight ratio of (5-60):(5-60):(5-20).

A system for the purification of exhaust gas, which is manufactured by wash coating a porous carrier powder comprising a platinum, palladium or rhodium catalytic material onto a porous ceramic material formed in multi-phase and having good resistance to heat, acid and base, the porous ceramic material consisting essentially of:

• oxides of Si, Al, and Ti;
• wherein the oxides comprise SiO2, Al2O3 and TixOy wherein x represents an integer of 1 to 3, and y represents an integer of 1 to 3 as a (first component)-(second component)-(third component) in the weight ratio of (5-60):(5-60):(5-20).

A system for the purification of exhaust gas, which is manufactured by loading a platinum, palladium or rhodium catalytic material onto a porous ceramic material formed in multi-phase and having good resistance to heat, acid and base, the porous ceramic material consisting essentially of:

• oxides of Si, Al, and Ti;
• wherein the oxides comprise SiO2, Al2O3 and TixOy wherein x represents an integer of 1 to 3, and y represents an integer of 1 to 3 as a (first component)-(second component)-(third component) in the weight ratio of (5-60):(5-60):(5-20).

A porous ceramic material formed in multi-phase and having good resistance to heat, acid and base, consisting essentially of:

• oxides of Si, Al, Ti, and Zr;
• wherein the oxides comprise SiO2, Al2O3, TixOy and ZrO2 wherein x represents an integer of 1 to 3, and y represents an integer of 1 to 3 as a (first component)-(second component)-(third component)-(fourth component) in the weight ratio of (5-60):(5-60):(5-20):(5-60).