Being the porous ceramic honeycomb filter which is formed from the oxide ceramic material which the porous ceramic honeycomb filter where pole diameter distribution is controlled,

摘要

The porous ceramic honeycomb filter made ​​from oxide-based ceramic material having a pore size distribution with a ₁ ≧ _7.0μm d is disclosed. It oxide material is titanium or aluminum is preferably cordierite. Alternatively, containing cordierite-containing ceramic material having a narrow pore size distribution of d _b ≦ 1.00, where, d _b = filter is (d ₉₀ -d ₁₀₎ / d _50. Particle size narrow d _ps ≦ 0.90 magnesia source, alumina source, and a mixture of inorganic source materials selected from the group consisting of silica source, as well as d _ps = {(dp ₉₀ -dp ₁₀₎ / dp _50} honeycomb green body produced from the pore-forming agent having a distribution, batch mixture and method are also disclosed. the pore-forming agent is selected from the group consisting of potato starch single mode canna starch, sago starch, mung bean starch, are preferred.