摘要:
As a ceramic structural body improving material properties of a sealing member such as adhesion properties at room temperature and high temperature and the like and having an improved durability, there is proposed a ceramic structural body comprising an assembly of plural united ceramic members 2, 3 each having a plurality of through-holes arranged side by side along a longitudinal direction, in which end faces at either side of these through-holes are closed in a checkered pattern so as to have a reverse relation of open and close between gas inlet side and gas outlet side and adjacent through-holes are permeable to each other through porous partition walls, characterized in that a plurality of the ceramic members 2, 3 are integrally adhered by interposing a sealing member 4 of an elastic material consisting of at least inorganic fibers, an inorganic binder, an organic binder and inorganic particles and mutually bonded three-dimensionally intersected organic fibers and inorganic particles through the inorganic binder and organic binder between the mutual ceramic members.
摘要:
A ceramic filter includes a porous ceramic body (1) which is a sintered body of ceramic particles (1a), and a coating portion (2) formed on a surface of each ceramic particle to support the catalyst. The porous ceramic body (1) has a specific surface area equal to or greater than 0.5 m 2 /cc, measured by a mercury porosimeter, and an amount of the coating portion (2) is equal to or greater than 15g/l.
摘要:
Provided is a silicon carbide ceramic having a small amount of resistivity change due to temperature change and being capable of generating heat by current application; and containing silicon carbide crystals having 0.1 to 25 mass% of 4H-SiC silicon carbide crystals and 50 to 99.9 mass% of 6H-SiC silicon carbide crystals, preferably having a nitrogen content of 0.01 mass% or less, more preferably containing two or more kinds of silicon carbide particles containing silicon carbide crystals and silicon for binding these silicon carbide particles to each other and having a silicon content of from 10 to 40 mass%.
摘要:
A ceramic filter includes a porous ceramic body (1) which is a sintered body of ceramic particles (1a), and a coating portion (2) formed on a surface of each ceramic particle to support the catalyst. The porous ceramic body (1) has a specific surface area equal to or greater than 0.5 m 2 /cc, measured by a mercury porosimeter, and an amount of the coating portion (2) is equal to or greater than 15g/l.
摘要:
A honeycomb filter for clarifying an exhaust gas which is composed of a cylinder of a porous ceramic having numbers of through holes separated by wall portions being provided in the longitudinal direction and arranged parallel with one another, and a sealing material layer formed around the perimeter of the cylinder, wherein the wall portions separating the through holes function as a filter for capturing particles, characterized in that in the cross section perpendicular to the through holes, the proportion (Sα) of the area for the sealing layer relative to the total area of the cross section is 0.5 % or more, and the proportion (Vα) of organic components relative to the whole honeycomb filter is 0.5 wt % or less. The above honeycomb filter has a relatively large amount of a sealing material layer and, in spite of this, the amount of organic matters in a gas discharged from the honeycomb filter is little increased as compared to a gas charged to the filter.