摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
There is disclosed a honeycomb structure 1 having a plurality of cells 4 partitioned by cell walls 2 to function as fluid passages, a predetermined cell 4 being plugged by a plugging material at one end face, a remaining cell 4 being 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 2. 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.
摘要:
A bonding material for a honeycomb structure comprises inorganic particles in which D90/D10 is from 10 to 500, D10 is 100 μm or less and D90 is 4 μm or more, and the D10 and D90 are the values of 10% diameter and 90% diameter from a smaller particle diameter side, respectively, in volume-based integrated fractions of a particle diameter distribution measurement by a laser diffraction/scattering method.
摘要:
The method for measurement of thermal conductivity of a honeycomb structure according to the present invention comprises the steps keeping the whole honeycomb structure in a steady temperature state with keeping two ends of the honeycomb structure at given different temperatures; and measuring a thermal conductivity of the honeycomb structure in the steady state. According to the present invention there is provided a method for measurement of thermal conductivity of a honeycomb structure, which can measure the thermal conductivity of a honeycomb structure in the shape of the honeycomb structure per se or in a predetermined block shape without preparing, for example, a test specimen of particular shape.
摘要:
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%.
摘要:
A method of manufacturing a monolithic honeycomb structure free from coarse pinhole defects, the method including: mixing ceramic powders, metal silicon whose surface is coated with an organic matter, a binder and water to obtain a mixture; kneading the mixture to form a plastic clay; pugging the plastic clay; extruding the pugged plastic clay from an extruder to form a green honeycomb body having a predetermined shape, the green honeycomb body lacking closed pores; drying the green honeycomb body; calcining the dried green honeycomb body; and firing the calcined green honeycomb body.