Ngk Insulators, Inc.

Ngk Adrec Co., Ltd.

Mgk Insulators, Ltd.

Naoshi Masukawa

Shuichi Ichikawa

Atsushi Watanabe

Takashi Harada

Atsushi Kaneda

Jun Fujita

Koichi Iwata

Osamu Yamakawa

Tetsuhiro Honjo

Syuichi Ichikawa

Honjo Tetsuhiro

There is disclosed a honeycomb structurewhich is made of a ceramic material and in which a plurality of honeycomb segmentshaving cell structuresand porous outer wallson outer peripheries of the cell structuresare integrated by bonding the outer wallsto one another with a bonding material, each of the cell structures being provided with a plurality of cellsconstituting fluid channels divided by porous partition walls, wherein the bonding material contains a bio-soluble fiber. The honeycomb structureof the present invention has a performance equivalent to that of a honeycomb structure in which a heretofore used ceramic fiber is contained.

Honeycomb structure and bonding material to be used for same

A honeycomb structurecomprising a honeycomb segment bonded bodyhaving a number of honeycomb segmentsintegrated on each bonding planes via bonding material layershas a structure so that a number of cellsproviding fluid flow channels are disposed in parallel in the direction of center axis thereof. The honeycomb structureis constructed so that the porosity of an outer portion of the bonding material layers(an area from the interface with the honeycomb segment-bonding plane to a point apart from that interface by a distance equivalent to 20% of the entire layer thickness) is smaller than the porosity of a central portion located inward of the outer portion, and so that the bonding material layershave a compression Young's modulus along the Z-axis of 5 to 100 MPa.

Honeycomb structure

There is disclosed a honeycomb structurehaving a plurality of cellspartitioned by cell wallsto function as fluid passages, a predetermined cellbeing plugged by a plugging material at one end face, a remaining cellbeing plugged by the plugging material at the other end face, wherein a Young's modulus of the plugging material is lower than that of the cell wall. A strength of the plugging material is lower than that of the cell wall. A porosity of the plugging material is 97% or more of that of the cell wall. There is provided a honeycomb structure whose end face is not easily cracked and which is superior in durability.

There is provided a honeycomb structurecomprising a honeycomb segment joined bodyhaving a plurality of honeycomb segmentsintegrally joined with one another at a joint face of each of the honeycomb segments by means of a bonding material layerand having a plurality of cellsfunctioning as fluid passages disposed in parallel with one another in a direction of central axis. Porosity in an outside portion of the bonding material layer(portion from the interface of the joint face of honeycomb segments to the point corresponding to 20% thickness of the total bonding material layer) is smaller than that in the central portion located on the inner side of the outside portion.

Disclosed is a honeycomb structure which is bonded with a bonding material containing 0.1 to 10 mass % of a layered clay mineral. Also disclosed are a honeycomb structure which is bonded with a bonding material containing 0.1 to 10 mass % of an organic binder, and a honeycomb structure which is bonded with a bonding material having a Casson yield value of 6 Pa or more. Further disclosed is a method for producing such a honeycomb structure.

Honeycomb structure and method for producing same

A ceramic honeycomb structure body () including a configuration in which a plurality of porous honeycomb segments () are bound one another with an adhesive layer () interposed between each two neighboring porous honeycomb segments (), where a plurality of protrusion portions () fixed to one of the adhesion surfaces () respectively of two honeycomb segments () opposed to each other with the adhesive layer () interposed between the two honeycomb segments () are embedded into the adhesive layer ().

Ceramic honeycomb structure body and method of manufacturing the same

In a honeycomb structurewhich is made of a ceramic and in which a plurality of honeycomb segmentshaving cell structuresand porous outer wallson outer peripheries of the cell structuresare integrated by bonding these outer wallsto one another with a bonding material, each of the cell structures being provided with a plurality of cellsconstituting fluid channels divided by porous partition walls, a base material constituting the honeycomb structurehas a thermal conductivity of 0.1 to 20 W/mK. Moreover, an outer periphery coating material constituting the outer peripheral wall of the honeycomb structurehas a porosity of 10 to 60%. Furthermore, the outer periphery coating material constituting the outer peripheral wall of the honeycomb structurehas a thermal conductivity of 0.01 to 0.5 W/mK.

Honeycomb structure body

A method of bonding at least a first ceramics structure () to a second ceramics structure (), which includes the steps of applying a pressure to the first ceramics structure () and the second ceramics structure () in such a direction that these structures move close to each other with a bonding material layer () interposed between the first ceramics structure () and the second ceramics structure () (FIG. A), removing a bonding material () extruded from the bonding material layer () to an end face of a stacked body including the first ceramics structure () and the second ceramics structure () by the application of the pressure thereto (FIG. B), drying a bonding material () near the end face of the stacked body () after the extruded bonding material () is removed (FIG. C), and drying the entire part of the stacked body ().

Method of bonding ceramics structures

There is provided a honeycomb structured body having improved durability in a honeycomb structure body obtained by unitarily bonding a plurality of honeycomb segments. There is provided a honeycomb structure bodyincluding a plurality of honeycomb segmentseach having an outer wall, partition wallsdisposed in the outer wall, and a plurality of cellsseparated from each other by the partition wallsand extending in an axial direction, a bonding layerinterposed between the plurality of honeycomb segmentsto unitarily bond the honeycomb segments, and an intermediate layerinterposed between the bonding layerand the honeycomb segments. In the honeycomb structure body, pores having a diameter of 0.5 &#x3bc;m or more of the intermediate layeroccupies 25% by volume or less of the whole volume of the intermediate layer

A honeycomb structure includes honeycomb segments separated by porous partitions and having circulation holes through the honeycomb segments in an axial direction; a spacer positioned between neighboring honeycomb segments of the honeycomb segments; and a bonding layer located between honeycomb segments where the spacers are positioned and bonding the neighboring honeycomb segments. The spacer has Young's modulus in a range of 0.1 to 1.5 GPa. A ratio of area of the spacer to area of the bonding layer between the neighboring honeycomb segments is in a range of 0.2 to 30%.

Honeycomb structure and method of manufacturing the same

The honeycomb structure of the present invention has a construction wherein a plurality of cellseach functioning as a passage of a fluid, surrounded by porous partition wallsare arranged so as to be parallel to each other in the central axis direction of the honeycomb structure, and has such a constitution that a plurality of honeycomb segmentsare bonded integrally by a bonding materialcontaining a ceramic as a main component and a particulate filler. In the honeycomb structure, generation of drawbacks such as peeling of bonded area, cracking and the like is suppressed reliably, and the honeycomb structure is superior in durability.

The present invention provides a honeycomb structure in which a plurality of honeycomb segments each constituted by a cell structure having a plurality of cells divided from each other by partition walls and functioning as a passage for fluid and an outer wall provided at the circumference of the cell structure are bonded to each other at the outer walls by a bonding layer made of a bonding agent and converted into one piece, which honeycomb structure is characterized in that the bonding agent does not contain inorganic particles having diameters (&#x3bc;m) of at least 1.1 times the average surface roughness Ra (&#x3bc;m) of the outer wall, in an amount exceeding 30% by mass relative to the total of the bonding agent. In the honeycomb structure, the honeycomb segments as a constituent are strongly bonded to each other by a bonding agent and converted into one piece.

There is disclosed a honeycomb structure in which a positional deviation is not easily occurred by vibration or the like in the honeycomb structure held in a can, of which the strength reduction is small and which can be easily produced, and a process for production of the structure. The honeycomb structurecomprises a cell structure portionconstituted of partition wallsarranged so as to form a plurality of cellsextending through an axial direction, and an outer peripheral walldisposed in an outer periphery of the cell structure portionA surface roughness Ra of an outer peripheral surface of the outer peripheral wall is 1 to 80 &#x3bc;m.

Honeycomb structure and process for production thereof

A honeycomb structure, and a process for production thereof, formed by bonding into one piece via a bonding layer a plurality of honeycomb segments, the honeycomb segment having an outer wall, partition walls provided inside the outer wall, and a large number of through-holes divided by the partition walls and extending in the axial direction of the segment; the outer wall and bonding layer having a relation:*[(&#x3ba;)+(&#x3ba;)]&#x2267;&#x3ba;&#x2267;*[(&#x3ba;)+(&#x3ba;)]&#xd7;0.6wherein &#x3ba;c (W/mK) and dc (cm) are respectively the thermal conductivity and thickness of the outer wall, &#x3ba;a (W/mK) and da (cm) are respectively the thermal conductivity and thickness of the bonding layer, and &#x3ba; (W/mK) and d (cm) are respectively the thermal conductivity and thickness of a layer which is the sum of the outer wall and the bonding layer.

Growing community of inventors

Nishikasugai-gun, Japan

Naoshi Masukawa