A die body apparatus (101) includes a first discharge member (105) configured to be bonded with respect to a base member (103) such that aligned elongated openings (209) of the base member (103) and first discharge member (105) provide a plurality of elongated feed passages placing a plurality of feed holes (106) of the base member (103) in fluid communication with a first honeycomb network of discharge slots (415) of the first discharge member (105). In further examples, methods of assembling a die body apparatus (101) includes the step of bonding a selected discharge member (105) of at least one discharge member with respect to a base member (103). In further examples methods of extruding batch material into a honeycomb body includes the steps of bonding a selected discharge member (105) with respect to a base member (103) and extruding a quantity of batch material through the die body apparatus (101) into an extruded honeycomb body with a honeycomb network of channels.

A honeycomb body with a honeycomb structure having an inner zone of a first plurality of walls and an outer zone of a second plurality of walls at least partially surrounding the inner zone. The honeycomb structure has Pi that is greater than Po and MPSi that is greater than MPSo, wherein Pi is an average bulk porosity of the first plurality of walls, Po is an average bulk porosity of the second plurality of walls, MPSi is a median pore size of pores in the first plurality of walls, and MPSo is a median pore size of pores in the second plurality of walls. Various honeycomb structures, honeycomb extrusion apparatus, and co-extrusion methods are disclosed.

A masking method for honeycomb formed body, including bonding a film on at least one bottom face of a honeycomb formed body in a quadrangular prism shape such that an adhesive surface is in contact with the bottom face. The step of bonding the film includes bonding of the film so as to have a bottom face covering portion that covers a whole surface of the bottom face and a pair of outer edge portions along one pair of opposite sides of a quadrangle defining an outer peripheral shape of the bottom face and a pair of protruding portions protruding from another pair of opposite sides of the quadrangle. At least a part of the adhesive surface of each of the pair of protruding portions is bonded so as to be in contact with a pair of opposing lateral faces of the honeycomb formed body.

An air-heating type heat not burn heating device, a ceramic heating element and a preparation method thereof are provided. The ceramic heating element includes a honeycomb ceramic body and a heating printed circuit. Porous channels are arranged in the honeycomb ceramic body, and the porous channels are circular holes or polygonal holes. The heating printed circuit is arranged around an outer surface of the honeycomb ceramic body to heat the air passing through the porous channels. According to the ceramic heating element, the surface made of high purity alumina honeycomb ceramic has high compactness, it is able to effectively prevent absorption of smoke dust particles, thus to effectively preventing odd smell; the high-purity alumina honeycomb ceramic has good thermal conductivity, with a thermal conductivity of 33 W/mk; the wall thickness and pore diameter in the honeycomb ceramic structure are both very small, and the thermal conductivity is extremely excellent.

A tool die for forming a green ceramic body. The tool die has a wear resistant coating that is deposited on a substrate and has an outer or free surface having a morphology that provides a mean roughness in a range from about 0.03 μm up to about 0.8 μm Rq. In one embodiment, the wear resistant coating has multiple alternating layers of fine grained and coarse grained materials. Methods of making the tool die and wear resistant coating are also provided.

A ceramic honeycomb structure having pluralities of flow paths partitioned by porous cell walls; (a) the cell walls having porosity of 50-60%; and (b) in a pore diameter distribution in the cell walls measured by mercury porosimetry, (i) pore diameters at cumulative pore volumes corresponding to particular percentages of the total pore volume being within specific ranges and having specific relationships; and (ii) the difference between a logarithm of the pore diameter at a cumulative pore volume corresponding to 20% of the total pore volume and a logarithm of the pore diameter at 80% being 0.39 or less, and its production method.

A ceramic honeycomb structure comprising large numbers of flow paths longitudinally formed by cell walls arranged in a lattice pattern in cross section, and an outer peripheral wall formed around the flow paths; in a cross section perpendicular to the longitudinal direction, fan-shaped bulges projecting in a fan shape toward the flow paths from cell wall intersections at which the cell walls are crossing; the circumscribed circles of circular portions of the fan-shaped bulges at all cell wall intersections having a constant radius; and when the distance between the center point of the circumscribed circle and the center point of the cell wall intersection is defined as a center point distance S, a center point distance So in the outer peripheral portion of the ceramic honeycomb structure and a center point distance Sc in the center portion meeting Sc<So.

A ceramic formed body extrusion method for forming a ceramic formed body having a wall-shaped or plate-shaped formed portion by using an extrusion die provided with a slit for extrusion of a ceramic formed body from a raw material for forming, the slit including a slit former stage unit located on an upstream side in an extrusion direction in the extrusion and a slit latter stage unit located on a downstream side in the extrusion direction, the slit latter stage unit having a width of three to 27 times a width of the slit former stage unit, and by extruding a raw material containing a first particle having an aspect ratio of two or more and less than 300 such that the raw material passes though the slit former stage unit of the extrusion die and then passes through the slit latter stage unit.

A honeycomb structure has partition walls defining a plurality of polygonal cells which become through channels for a fluid, a structure end face vertical to an axial direction has at least two cell regions possessing mutually different cell structures and surrounded by circumferential portions, and in the cell regions adjacent to each other, to first partition walls of a first cell structure of one first cell region, second partition walls of a second cell structure of the other or second cell region are tilted.

A honeycomb structure has a pillar-shaped honeycomb structure body having porous partition walls which defines cells which forms a passage of liquid extended from an inflow end face toward an outflow end face, a circumferential wall arranged to surround a circumference of the partition walls. The honeycomb structure body has an outermost circumference cell structure including a complete cell arranged at the outermost circumference of the honeycomb structure body, a center cell structure formed by the cells arranged at a center part at an inner side to the outermost circumference cell structure, and a boundary wall arranged at a boundary part between the outermost circumference cell structure and the center cell structure. The outermost circumference cell structure and the center cell structure are formed as different structures to each other, and a thickness of the boundary wall is set to be thicker than a thickness of the circumferential wall.