摘要:
A honeycomb structural body includes at least one honeycomb unit including a β type zeolite, a phosphate group zeolite, and an inorganic binder and having plural through holes divided by partition walls and arranged in a longitudinal direction thereof. The β type zeolite includes secondary particles having an average particle diameter of 0.5 µm or more and 5 µm or less. The phosphate group zeolite includes primary particles having an average particle diameter of 0.5 µm or more and 5 µm or less. A ratio of a mass of the phosphate group zeolite with respect to a total mass of the β type zeolite and the phosphate group zeolite is 5% or more and 35% or less.
摘要:
A holding seal material which has alumina-silica based fibers aggregated into a mat shape as a constituent element (4), and is placed in a gap between a ceramic body (2) capable of allowing a fluid to flow through the inside thereof and a metal shell (3) covering the outer circumference of the ceramic body, wherein the dispersion of fiber diameter in said alumina-silica based fiber is within ±3 µm.
摘要:
Provided is an exhaust pipe having a superior heat releasing characteristic. The present invention provides a method for producing an exhaust pipe provided with a metal base material and a surface coating layer formed on a surface of the metal base material, the method including: a coatfilm forming step of forming a coat film on a surface of the metal base material by carrying out an electrocoating process using a paint containing inorganic glass particles and an electrocoating resin; and a heating step of heating, after the coatfilm forming step, the coat film to temperature that is not less than the burning-out temperature of the electrocoating resin, and further heating the coat film to temperature that is not less than the softening point of the inorganic glass particles.
摘要:
It is an object of the present invention to provide an exhaust pipe paint with which it is possible to manufacture an exhaust pipe having predetermined heat dissipation, as well as excellent heat resistance and thermal shock resistance, by taking advantage of heat of exhaust gas. An exhaust pipe paint for application to an exhaust pipe base comprises: an inorganic glass particle; an inorganic particle; and at least one of an inorganic binder and a precursor of the inorganic binder, the inorganic binder partially softening at a softening temperature of the inorganic glass particle.
摘要:
A gas separation membrane is provided which has both excellent gas permeability and gas separation characteristics, particularly permeability of carbon dioxide (CO 2 ) and separation characteristics of carbon dioxide and methane (CH 4 ), at such a high level that has not hitherto been achieved. The gas separation membrane was obtained by heat treating a membrane composed of a hyperbranched polyimide-based material in a non-oxidizing atmosphere.
摘要:
A holding seal member for holding an exhaust gas treating element which treats an exhaust gas within a housing is provided. The holding seal member includes: at least two layers of inorganic fiber sheet members stacked on one another, the at least two layers comprising a front layer to be in contact with the housing and a back layer to be in contact with the exhaust gas treating element. A width of the back layer in an exhaust gas inflow direction is smaller than that of the front layer by a specific length.
摘要:
A method of manufacturing a honeycomb structure including a honeycomb unit includes the steps of (a) forming a honeycomb molded body containing inorganic particles having a specific surface area of 50 m 2 /g or more and at least one of a molding aid and an organic binder and having a plurality of cells extending from a first end face to a second end face of the honeycomb molded body along a longitudinal direction thereof and separated by a plurality of cell walls; (b) placing the honeycomb molded body in a degreasing apparatus with the first end face facing downward and the second end face facing upward; (c) feeding introduced gas into the degreasing apparatus; (d) degreasing the honeycomb molded body at a temperature of 200 °C to 400 °C; and (e) firing the degreased honeycomb molded body at a temperature of 500 °C to 900 °C and thereby obtaining the honeycomb unit. The introduced gas is caused to flow from the first end face to the second end face inside the honeycomb molded body through the cells thereof, and the introduced gas contains oxygen and nitrogen with an oxygen-to-nitrogen ratio of 1.5:98.5 (vol%) to 5.5:94.5 (vol%).