Abstract: There is provided a bonding material composition for obtaining a joined body by unitarily joining two or more members to be joined by means of a bonding material layer, wherein the bonding material composition contains flat particles, non-flat particles, smectite-based clay, and an inorganic adhesive as main components. The bonding material composition costs little, can relax thermal stress generated in the joined body without using fibers which may do harm to a human body, and can reduce defects such as a crack and a void upon drying or a thermal treatment.

Abstract: A method for producing a honeycomb structure where a body containing a forming formulation composed of a cordierite forming material and an organic binder is formed into a honeycomb shape to prepare a honeycomb formed article, and the honeycomb formed article is fired to obtain a honeycomb structure, wherein the forming formulation comprises two or more types of magnesium-containing materials containing at least talc (a first magnesium-containing material), and a magnesium-containing material except talc (a second magnesium-containing material) has an average particle diameter of 4 ?m or less; and a honeycomb structure produced by the above method The above method allows the production of a well formed honeycomb structure, even when the above body contains a small of an organic material.

Abstract: A silicon carbide-based porous material containing silicon carbide particles (1) as an aggregate and metallic silicon (2), wherein the average particle diameter of the silicon carbide-based porous material is at least 0.25 time the average particle diameter of the silicon carbide particles (1), or the contact angle between the silicon carbide particles (1) and the metallic silicon (2) is acute, or a large number of secondary texture particles each formed by contact of at least four silicon carbide particles (1) with one metallic silicon (2) are bonded to each other to form a porous structure. This silicon carbide-based porous material can be sintered, in its production, at a relatively low firing temperature and, therefore, can be provided at a low production cost, at a high yield and at a low product cost.

Abstract: A honeycomb structure having a large number of channels through along the axial direction and being defined by partition walls. A honeycomb structure containing a refractory particle to be an aggregate and metallic silicon and being porous. This honeycomb structure can be suitably used under high SV conditions as a filter for purifying automobile exhaust gas by treatment such as clogging or catalyst supporting.

Abstract: There is disclosed a ceramic clay obtained by kneading a forming material containing a ceramic forming material, wherein the forming material contains layered double hydroxide, in addition to the ceramic forming material, at a ratio of 0.5 to 50% by mass with respect to a total with the ceramic forming material, and hardness measured by an NGK clay hardness meter is set to 4 to 18 mm. A high-strength honeycomb structure can be obtained capable of preventing or inhibiting pollution and global warming when used in manufacturing a ceramic structure, and having few defects such as cracks.

Abstract: There is disclosed a ceramic clay obtained by kneading a forming material containing a ceramic forming material, wherein the forming material contains layered double hydroxide, in addition to the ceramic forming material, at a ratio of 0.5 to 50% by mass with respect to a total with the ceramic forming material, and hardness measured by an NGK system hardness scale is set to 10 to 35 mm. A high-strength honeycomb structure can be obtained capable of preventing or inhibiting pollution and global warming when used in manufacturing a ceramic structure, and having few defects such as cracks.

Abstract: There are provided a honeycomb structure and a method of manufacturing the structure, capable of preventing or reducing generation of CO2 or harmful gas during firing to thereby prevent or inhibit pollution and global warming, and capable of obtaining a honeycomb structure having few defects such as cracks and maintaining high strength and low thermal expansion. In a method of manufacturing a honeycomb structure, in which a forming material containing a cordierite forming material and an organic binder is kneaded and formed to prepare a honeycomb-shaped formed article (honeycomb formed article), and the prepared honeycomb formed article is fired to obtain a honeycomb-shaped structure (honeycomb structure) mainly composed of cordierite: the forming material containing a layered clay mineral whose layer charge (X) is 0.

Abstract: It is directed to a silicon carbide-based porous body, wherein said body is a porous one which contains silicon carbide particles as an aggregate and metallic silicon, and has an oxygen-containing phase at the surfaces of silicon carbide particles and/or metallic silicon or in the vicinity of the surfaces thereof. The silicon carbide-based porous body contains refractory particles such as silicon carbide particles or the like and yet can be produced at a relatively low firing temperature at a low cost, has a high thermal conductivity, and is superior in oxidation resistance, acid resistance, chemical resistance to ash and particulates.

Abstract: A honeycomb structure body which has a number of passages partitioned with partition walls and penetrating along the axial direction. A porous honeycomb structure body which contains refractory grains as filler, one or more elements selected from the group consisting of the rare earth elements, alkaline earth elements, Al, and Si, and the crystal containing one or more kinds of these elements. The present honeycomb structure body contains refractory grains such as silicon carbide grains and the like, but it can be produced at a relatively low firing temperature at a low price, it is sufficiently porous and high in specific surface area, and it can be used as a filter for purifying automobile exhaust gas, a catalyst carrier, and the like under the high SV conditions.

Abstract: A honeycomb structure made of a silicon carbide-based porous body and having a number of through-holes extending in the axial direction, separated by partition walls. The strength and Young's modulus of the silicon carbide-based porous body satisfy the following relation: Strength (MPa)/Young's modulus (GPa)≧1.1. The honeycomb structure contains refractory particles such as silicon carbide particles and the like and yet can be produced at a relatively low firing temperature at a low cost, has a high strength and a high thermal shock resistance, and can be suitably used, for example, as a filter for purification of automobile exhaust gas by a treatment such as plugging of through-channel at its inlet or outlet, or as a catalyst carrier, even under a high SV condition.

Abstract: A silicon carbide-based porous material containing silicon carbide particles (1) as an aggregate and metallic silicon (2), wherein the average particle diameter of the silicon carbide-based porous material is at least 0.25 time the average particle diameter of the silicon carbide particles (1), or the contact angle between the silicon carbide particles (1) and the metallic silicon (2) is acute, or a large number of secondary texture particles each formed by contact of at least four silicon carbide particles (1) with one metallic silicon (2) are bonded to each other to form a porous structure. This silicon carbide-based porous material can be sintered, in its production, at a relatively low firing temperature and, therefore, can be provided at a low production cost, at a high yield and at a low product cost.

Abstract: A honeycomb structure having a large number of channels through along the axial direction and being defined by partition walls. A honeycomb structure containing a refractory particle to be an aggregate and metallic silicon and being porous. This honeycomb structure can be suitably used under high SV conditions as a filter for purifying automobile exhaust gas by treatment such as clogging or catalyst supporting.

Abstract: A honeycomb structure body which has a number of passages partitioned with partition walls and penetrating along the axial direction. A porous honeycomb structure body which contains refractory grains as filler, one or more elements selected from the group consisting of the rare earth elements, alkaline earth elements, Al, and Si, and the crystal containing one or more kinds of these elements. The present honeycomb structure body contains refractory grains such as silicon carbide grains and the like, but it can be produced at a relatively low firing temperature at a low price, it is sufficiently porous and high in specific surface area, and it can be used as a filter for purifying automobile exhaust gas, a catalyst carrier, and the like under the high SV conditions.

Abstract: It is directed to a silicon carbide-based porous body, wherein said body is a porous one which contains silicon carbide particles as an aggregate and metallic silicon, and has an oxygen-containing phase at the surfaces of silicon carbide particles and/or metallic silicon or in the vicinity of the surfaces thereof. The silicon carbide-based porous body contains refractory particles such as silicon carbide particles or the like and yet can be produced at a relatively low firing temperature at a low cost, has a high thermal conductivity, and is superior in oxidation resistance, acid resistance, chemical resistance to ash and particulates.

Abstract: A honeycomb structure made of a silicon carbide-based porous body and having a number of through-holes extending in the axial direction, separated by partition walls.