A manufacturing method of a honeycomb filter includes a kneaded material preparation process, a forming process, and a firing process, wherein the cordierite forming raw material contains porous silica as an inorganic pore former, in a cumulative particle size distribution of the cordierite forming raw material, particle diameters (μm) of 10% by volume, 50% by volume, and 90% by volume of the total volume from a small diameter side, are denoted by D.sub.(a) 10, D.sub.(a) 50 and D.sub.(a) 90, respectively, and a particle diameter (μm) of 50% by volume of the total volume from the small diameter side is denoted by D.sub.(b) 50 in a cumulative particle size distribution of the organic pore former, and the cordierite forming raw material and the organic pore former satisfy given expressions.

A manufacturing method of a honeycomb filter includes a kneaded material preparation process, a forming process, and a firing process, wherein the cordierite forming raw material contains porous silica as an inorganic pore former, in a cumulative particle size distribution of the cordierite forming raw material, particle diameters (μm) of 10% by volume, 50% by volume, and 90% by volume of the total volume from a small diameter side, are denoted by D.sub.(a) 10, D.sub.(a) 50 and D.sub.(a) 90, respectively, and a particle diameter (μm) of 50% by volume of the total volume from the small diameter side is denoted by D.sub.(b) 50 in a cumulative particle size distribution of the organic pore former, and the cordierite forming raw material and the organic pore former satisfy given expressions.

A manufacturing method of a honeycomb filter includes a kneaded material preparation process, a forming process and a firing process, wherein the cordierite forming raw material contains at least one of porous silica and fused silica, particle diameters (μm) of 10% by volume, 50% by volume and 90% by volume, from a small diameter side, are denoted by D.sub.(a) 10, D.sub.(a) 50 and D.sub.(a) 90 in a cumulative particle size distribution of the cordierite forming raw material, and a particle diameter (μm) of 50% by volume from a small diameter side is denoted by D.sub.(b) 50 in a cumulative particle size distribution of the organic pore former, D.sub.(b) 50 is 40 μm or less, and a cordierite forming raw material and an organic pore former satisfy given expressions.

A manufacturing method of a honeycomb filter includes a kneaded material preparation process, a forming process and a firing process, wherein the cordierite forming raw material contains at least one of porous silica and fused silica, particle diameters (μm) of 10% by volume, 50% by volume and 90% by volume, from a small diameter side, are denoted by D.sub.(a) 10, D.sub.(a) 50 and D.sub.(a) 90 in a cumulative particle size distribution of the cordierite forming raw material, and a particle diameter (μm) of 50% by volume from a small diameter side is denoted by D.sub.(b) 50 in a cumulative particle size distribution of the organic pore former, D.sub.(b) 50 is 40 μm or less, and a cordierite forming raw material and an organic pore former satisfy given expressions.

A composite ceramic element and method of firing clay or ceramic elements in a roller kiln, comprising the steps of passing a first ceramic element on rollers through the roller kiln, passing a second ceramic element on rollers through the roller kiln, and mating and securing the first and second ceramic elements together after passing each said ceramic element through the roller kiln.

A composite ceramic element and method of firing clay or ceramic elements in a roller kiln, comprising the steps of passing a first ceramic element on rollers through the roller kiln, passing a second ceramic element on rollers through the roller kiln, and mating and securing the first and second ceramic elements together after passing each said ceramic element through the roller kiln.

A ceramic honeycomb structure comprising a ceramic honeycomb body having pluralities of longitudinal flow paths partitioned by square-lattice-cross-sectioned cell walls, and an outer peripheral wall formed on an outer periphery of the ceramic honeycomb body; the outermost peripheral cell wall of the ceramic honeycomb body having an outer peripheral surface shape reflecting the square lattice shapes of the cell walls; the thickness of the outer peripheral cell wall being larger than the thickness of the cell walls; and the outer peripheral wall being formed to cover an outer peripheral surface of the outer peripheral cell wall.

A ceramic honeycomb structure comprising a ceramic honeycomb body having pluralities of longitudinal flow paths partitioned by square-lattice-cross-sectioned cell walls, and an outer peripheral wall formed on an outer periphery of the ceramic honeycomb body; the outermost peripheral cell wall of the ceramic honeycomb body having an outer peripheral surface shape reflecting the square lattice shapes of the cell walls; the thickness of the outer peripheral cell wall being larger than the thickness of the cell walls; and the outer peripheral wall being formed to cover an outer peripheral surface of the outer peripheral cell wall.

A carrier (230) for a honeycomb body (220) and a method for manufacturing a honeycomb body(220) are provided. The carrier (230) comprises a first side support (234), a second side support (236), and a flexible sheet (240) suspended between the first (234) and second (236) side supports for supporting the honeycomb body (220). The method comprises placing a green honeycomb body (220) on the flexible sheet (240) and transporting the green honeycomb body (220).

A carrier (230) for a honeycomb body (220) and a method for manufacturing a honeycomb body(220) are provided. The carrier (230) comprises a first side support (234), a second side support (236), and a flexible sheet (240) suspended between the first (234) and second (236) side supports for supporting the honeycomb body (220). The method comprises placing a green honeycomb body (220) on the flexible sheet (240) and transporting the green honeycomb body (220).