A ceramic honeycomb filter (10) comprising a ceramic honeycomb structure (1) having porous partition walls (3) defining a plurality of flow paths (4) for flowing an exhaust gas through the porous partition walls (3) to remove particulates from the exhaust gas, wherein one end of each flow path (4) is provided with a sealer (5), such that the sealers of the flow paths (4) in an inlet and an outlet of the ceramic honeycomb structure are arranged in a desired pattern; wherein the partition walls (3) have thickness of 0.1-0.5mm and a porosity of 50-80%; wherein the porosity of the sealers (5) is larger than that of the partition walls (3); and wherein the depth of the sealers (5) is 3-15mm.

Ceramic honeycomb filter

An exhaust gas filter for internal combustion engine and of honeycomb structure comprising a ceramic fiber and inorganic binder, the ceramic fiber consists mainly of Al₂O₃ and SiO₂, the inorganic binder including Al₂O₃ and SiO₂ to bind the said ceramic fiber, and the inorganic binder is of single glass phase or of mixed phase of a glass phase and a crystal phase keeping the same crystal structure in the temperature range of 20 to 1200°C, whereby, in the inorganic binder, any crystal such as quartz which produces abnormal expansion due to crystal phase transition is excluded, and occurrance of crack is prevented..

Exhaust gas filter and method for making the same

In filtering particles such as soot from a flue gas a porous filter body of a particulate material bonded together in the body is employed. The material is a metal or metal-like material having a thermal conductivity in excess of 10 W/mK, and the porous filter body has a porosity of 50-90% and a maximum pore size of 10-40 um. The porous filter body also has a thermal conductivity in excess of 10 W/mK. In accordance with the method, the flue gas is conducted through the porous filter body so as to accumulate the particles in the porous filter body. The particles accumulated in the porous filter body are burned off, whereby heat is generated locally. The heat generated locally by the burning-off of the particles is conducted throughout the porous filter body so that the temperature rise generated by the burning-off heat is reduced. Consequently, the porous filter body is not exposed to fatal, thermal stresses. A particular application of the porous filter body of the flue gas filter means is in vehicles comprising combustion engines generating soot, such as in diesel engines.

Method of filtering particles from a flue gas, a flue gas filter means and a vehicle

A ceramic filter for trapping and combusting diesel exhaust particulates composed of an end-plugged cordierite honeycomb structure exhibiting a pore size distribution as determined by mercury porosimetry in which the quantity d50/(d50 + d90) as related to pore size distribution is less than 0.70, a soot loaded permeability factor Sf, as defined by the equation [d50/(d50 + d90)]/[%porosity/100], of less than 1.55, and, a coefficient of thermal expansion (25-800 C) of no greater than 17 x 10-7/ C. The ceramic filter further exhibits a median pore diameter, d50, of at least 4 micrometers and up to 40 micrometers. A method of making the filter is provided.

Magnesium aluminum silicate structures for dpf applications

In a ceramic honeycomb structural body having a plurality of open-ended cells defined by cell walls, a reinforcing portion is formed in each corner part of an open-ended cell existing in a second zone outside a first zone inclusive of a center on a plane perpendicular to the open-ended cells.

Ceramic honeycomb structural body

A ceramic filter for a dust-containing gas, which comprises a filter base having an average pore size of from 10 to 100 µm, with the pore size ratio at positions of 75 vol% and 25 vol% of the accumulated pore size distribution being at least 1.3, and a filter layer having an average pore size of from 0.2 to 10 µm fixed at least to the filtering side surface of the filter base so that the filter layer fills the pores open on the surface of the filter base. forms pores when burned off.

Ceramic filter for a dust-containing gas and method for its production.

A multicellular monolithic ceramic body having many gas passages partitioned by thin walls is made of aluminum titanate as a major cnstituent and has less than 0.15% of a thermal expansion coefficient at 1000° C. and higher than 350 kg./cm2 of a compressive strength as zero of an open frontal area as the properties in the direction along the gas passages and more than 35% of a porosity.

Multicellular monolithic ceramic body and preparation thereof

Heat resistant castable blend

PURPOSE:To produce a carrier of catalysts for purification of automobile exhaust gas which is superior in heat resistance, porosity, and compressive strength and is low in the coefft. of thermal expansion by extruding a ceramics plastic compound consisting essentially of aluminum titanate into a honeycomb shape and calcining the same. CONSTITUTION:A honeycomb ceramics molding is used as a carrier of catalysts for removing harmful components of exhaust gas of automobiles. This molding is formed by extruding the plastic ceramic plastic composition prepd. by adding 5- 15% clay to aluminum titanate contg. >=85% Al2O3.TiO2 and 4-10% SiO2 into a honeycomb shape of 0.08-0.5mm. in thin walls, 40-200/cm in the number of pores and 50-85% sectional opening rate delineating the flow passage by means of dies. This is calcined at 1,350-1,500 deg.C, whereby the porous ceramics honeycomb molding of compressive strength, low coefft. of expansion of >35% porosity and high strength is produced.

Ceramic honeycomb and its production

A castable composition comprises strontium aluminate as a cement with an ultrafine ceramic powder having a particle size of 0.1µ or less as a hardness improver.

Takashi Mimori

Papers

Ceramic filter for a dust-containing gas and method for its production.

Multicellular monolithic ceramic body and preparation thereof

Heat resistant castable blend

Ceramic honeycomb and its production

Castable composition for heat resistant product