A method for fabricating a porous ceramic heating body, and a method of fabricating a heating body. The method for fabricating includes, in sequence, mixing, ball-milling, defoaming, molding, and drying, pore-forming agent discharging, sintering, and electrode leading. The whole method is simple, and by using a box furnace to sinter the green body under an oxidizing atmosphere and normal pressure, the fabricated ceramic heating body is heated uniformly and the heating efficiency is high.

A sound absorption material preparation method, a sound absorption material and a filling method thereof. The preparation method comprises: S1, preparing a non-foaming material slurry; S2, producing a combustible material framework and a cover-shape container, and placing the combustible material framework into the cover-shape container; S3, forming the non-foamed material slurry in the cover-shape container to form a wet formed body; S4, drying the wet formed body to form a dry formed body; and S5, calcining the dry formed body, wherein the combustible material framework is burned off during the calcining step to form connected channels with a three-dimensional structure in the sound absorption material. The preparation method is simple in operation. Connected channels with a three-dimensional structure are formed in the sound absorption material so that the sound absorption effect is improved. The sound absorption material is prepared by the preparation method, has connected channels with a three-dimensional structure therein, and has a good sound absorption effect. The filling method comprises first pre-forming the sound absorption material and then filling same into a space to be filled, so that the sound absorption material fully fills the space to be filled.

In one aspect, the disclosure relates to processes for preparation of a carbon foam material, the process comprising devolatization of coal-derived pitches or extracts at atmospheric pressure near green coke temperatures, thereby forming a solid coke-like material. In a further aspect, the process can further comprise grinding the solid coke-like material to a powder, providing the ground powder to a mold, and then reheating above green coking temperature (e.g., >600 C.) to further devolatize the material and form a porous solid foam material. The process further provides carbon materials such as carbon composite materials and sp2-hybridized carbon in the form of graphene oxide or graphene. In various aspects, the disclosure relates to the carbon foam and other materials prepared using the disclosed processes. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

Disclosed is a method for manufacturing a honeycomb structure. The method includes molding a molded body from a mixture containing silicon carbide particles, an organic component, and a dispersion medium, removing the organic component included in the molded body to obtain a porous honeycomb body, and impregnating an inner portion of partition walls of the porous honeycomb body with metal silicon. In a state in which the porous honeycomb body is placed on a support inside a container containing solid metal silicon, the impregnating an inner portion of the partition walls is performed by heating the inside of the container to a temperature higher than or equal to a melting point of the metal silicon so that the porous honeycomb body is impregnated with molten metal silicon through the support that is porous.

Disclosed is a method for manufacturing a honeycomb structure. The method includes molding a molded body from a mixture containing silicon carbide particles, an organic component, and a dispersion medium, removing the organic component included in the molded body to obtain a porous honeycomb body, and impregnating an inner portion of partition walls of the porous honeycomb body with metal silicon. In a state in which the porous honeycomb body is placed on a support inside a container containing solid metal silicon, the impregnating an inner portion of the partition walls is performed by heating the inside of the container to a temperature higher than or equal to a melting point of the metal silicon so that the porous honeycomb body is impregnated with molten metal silicon through the support that is porous.

A porous material having a hierarchical pore structure, wherein a size and shape of interconnection parts of at least one level pore cavities is consistent with a size and shape of interconnection parts between the level pore cavities and the previous level pore cavities thereof, and an average value of equivalent diameters of the interconnection parts is larger than 45% of that of a diameter of small pore cavities of two adjacent pore cavities of the interconnection parts. The method for preparing the porous material includes: mixing a raw material powder with a pore-forming agent used for preparing the smallest level pores to formulate a slurry; uniformly filling the slurry into a polymeric material frame, and drying and crushing to form mixed grains; then uniformly mixing the mixed grains with the pore-forming agent used for preparing the upper-level pore cavities, forming a compact green body and sintering.

A porous material having a hierarchical pore structure, wherein a size and shape of interconnection parts of at least one level pore cavities is consistent with a size and shape of interconnection parts between the level pore cavities and the previous level pore cavities thereof, and an average value of equivalent diameters of the interconnection parts is larger than 45% of that of a diameter of small pore cavities of two adjacent pore cavities of the interconnection parts. The method for preparing the porous material includes: mixing a raw material powder with a pore-forming agent used for preparing the smallest level pores to formulate a slurry; uniformly filling the slurry into a polymeric material frame, and drying and crushing to form mixed grains; then uniformly mixing the mixed grains with the pore-forming agent used for preparing the upper-level pore cavities, forming a compact green body and sintering.

A method for fabricating a porous ceramic heating body, and a method of fabricating a heating body. The method for fabricating includes, in sequence, mixing, ball-milling, defoaming, molding, and drying, pore-forming agent discharging, sintering, and electrode leading. The whole method is simple, and by using a box furnace to sinter the green body under an oxidizing atmosphere and normal pressure, the fabricated ceramic heating body is heated uniformly and the heating efficiency is high.

A method for manufacturing a ceramic product containing silicon carbide, including a step of firing a formed body of a green body containing silicon carbide by transporting the formed body from an inlet to an outlet of a continuous furnace, wherein the continuous furnace includes the inlet, a heating zone, a cooling zone, and the outlet in this order, and a furnace atmosphere in both the heating zone and the cooling zone is an inert gas having an oxygen concentration of 100 ppm by volume or less.

A method for manufacturing a ceramic product containing silicon carbide, including a step of firing a formed body of a green body containing silicon carbide by transporting the formed body from an inlet to an outlet of a continuous furnace, wherein the continuous furnace includes the inlet, a heating zone, a cooling zone, and the outlet in this order, and a furnace atmosphere in both the heating zone and the cooling zone is an inert gas having an oxygen concentration of 100 ppm by volume or less.