Abstract: A exhaust gas mixing apparatus includes an outer cylinder being configured to an insulating ceramic; fins being configured to an insulating ceramic, the fins being provided on an inner side of the outer cylinder; and an electric heating portion embedded in at least a part of the outer cylinder and/or the fins.

Abstract: A exhaust gas mixing apparatus includes an outer cylinder being configured to an insulating ceramic; fins being configured to an insulating ceramic, the fins being provided on an inner side of the outer cylinder; and an electric heating portion embedded in at least a part of the outer cylinder and/or the fins.

Abstract: The clay extruder includes a drum 2 having a screw 4 having a rotary shaft 6, a spiral rotary blade 5 for feeding the clay under pressure while kneading the clay fed into the screw, a pressure raising portion 10 to feed the clay under pressure while kneading the clay, and a rectifying portion 11 provided on the side of an extrusion port 20 in the drum 2 to rectify the clay into a columnar shape. The rectifying portion 11 has a rectifying rotary blade 7 whose intervals being longer than that of the rotary blade; an angle formed between the face on the side of the extrusion port in a sectional shape of the rectifying rotary blade cut along the central line of the rotary shaft 6 and the central line gradually decreases, as the rectifying rotary blade comes close to the extrusion port.

Abstract: There is disclosed a ceramic honeycomb structure which is not easily damaged and is excellent in durability even in a case where irregular canning conditions such as an overload and an offset load are generated. The ceramic honeycomb structure has a cell tilt angle of 0.5° or more and 35° or less and a substantially elliptic or oblong sectional shape vertical to a central axis direction.

Abstract: The clay extruder includes a drum 2 having a screw 4 having a rotary shaft 6, a spiral rotary blade 5 for feeding the clay under pressure while kneading the clay fed into the screw, a pressure raising portion 10 to feed the clay under pressure while kneading the clay, and a rectifying portion 11 provided on the side of an extrusion port 20 in the drum 2 to rectify the clay into a columnar shape. The rectifying portion 11 has a rectifying rotary blade 7 whose intervals being longer than that of the rotary blade; an angle formed between the face on the side of the extrusion port in a sectional shape of the rectifying rotary blade cut along the central line of the rotary shaft 6 and the central line gradually decreases, as the rectifying rotary blade comes close to the extrusion port.

Abstract: A slurry for molding an article is provided wherein a source powder including at least one of a ceramic powder and a metal powder is dispersed, introduced into a forming mold, cured in the forming mold to form the molded article, and at least a part of the forming mold is degraded or dissolved in releasing the molded article from the forming mold. The major components of the slurry include the source powder, a dispersion medium and a gellifying agent, wherein the dispersion medium and the gellifying agent each contain an organic compound having a reactive functional group such that the slurry is cured by a reaction between the organic compound in the dispersion medium and the organic compound in the gellifying agent.

Abstract: A furnace 10 according to the present invention includes a heating unit 1 and a furnace body 2 that can degrease an article 5, containing an organic substance, to be degreased by heating the article 5 with the heating unit 1. The furnace body 2 includes an outlet 21 and an inlet 22. The heating unit 1 includes a first heater 11 and a second heater 12. The furnace further includes a treatment gas-introducing unit 3 for introducing a treatment gas 7 treated with the second heater 12 into the furnace body 2 from the second heater 12 through the inlet 22. The treatment gas 7 is introduced into an internal section 20 of the furnace body from the inlet 22 in such a manner that the treatment gas 7 is circulated through the internal section 20 of the furnace body, the outlet 21, the treatment gas-introducing unit 3, and the inlet 22, whereby the concentration of the gaseous organic decomposition products in the internal section 20 of the furnace body is reduced such that explosion is prevented.

Abstract: A slurry for molding an article is provided wherein a source powder including at least one of a ceramic powder and a metal powder is dispersed, introduced into a forming mold, cured in the forming mold to form the molded article, and at least a part of the forming mold is degraded or dissolved in releasing the molded article from the forming mold. The major components of the slurry include the source powder, a dispersion medium and a gellifying agent, wherein the dispersion medium and the gellifying agent each contain an organic compound having a reactive functional group such that the slurry is cured by a reaction between the organic compound in the dispersion medium and the organic compound in the gellifying agent.

Abstract: A slurry for molding an article is provided wherein a source powder including at least one of a ceramic powder and a metal powder is dispersed, introduced into a forming mold, cured in the forming mold to form the molded article, and at least a part of the forming mold is degraded or dissolved in releasing the molded article from the forming mold. The major components of the slurry include the source powder, a dispersion medium and a gellifying agent, wherein the dispersion medium and the gellifying agent each contain an organic compound having a reactive functional group such that the slurry is cured by a reaction between the organic compound in the dispersion medium and the organic compound in the gellifying agent.

Abstract: A screw for an extruder includes a drive shaft and stirring blades arranged on the drive shaft, and blades among the stirring blades arranged at least part of the drive shaft adjacent to the leading edge of the drive shaft are interrupted blades, each of continuous surfaces of the interrupted blades being less than a full circle about the drive shaft. The screw is capable of effectively preventing problems that characteristics of a compressed material obtained are not unified in each part, resulting in uneven distribution, and discontinuous portions (screw marks) are formed inside the obtained compressed product.

Abstract: The inner shape of the body part in a hollow ceramic molded article constituting a precursor of a discharge vessel is precisely controlled so as to make a large improvement in the function of a discharge vessel formed by baking the hollow ceramic molded article.

Abstract: A method for producing a powder-molded body is provided, including the steps of casting a slurry containing a powder of at least one of a ceramic and a metal, and organic dispersion medium, and a gelling agent into a mold, and solidifying the slurry by gelling the slurry to obtain a molded body. The slurry is solidified by chemically bonding an organic dispersion medium having reactive functional groups and a gelling agent. The method is capable of improving gelling (solidification) efficiency and obtaining a molded body having a high density, a small firing shrinkage, and high shape precision, and which hardly experiences cracks during drying and firing.

Abstract: A method for producing a powder-molded body,includes: casting a slurry containing a powder of a ceramic and/or a metal, a dispersion medium, and a gelling agent; and solidifying the slurry by gelling the slurry to obtain a molded body. The slurry is solidified by chemically bonding an organic dispersion medium having reactive functional groups and a gelling agent. The method is capable of improving gelling (solidification) efficiency and obtaining a molded body with a high density, a small firing shrinkage, and a high shape precision while scarcely causing cracks at the time of drying and firing.

Abstract: There is provided a method of producing a metal/ceramic composite, comprising the steps of adding starch to a ceramic slurry; casting the slurry into a water-nonabsorptive mold; heating the slurry to harden it to obtain a hardened body; demolding the hardened body out of the mold; and drying the hardened body to obtain a molded body; and then impregnating pores of the molded body or pores of a porous ceramic body produced by firing the molded body with a metal. The method can produce a metal/ceramic composite having a narrow metal distribution at a low cost, while freely controlling metal content as designed for complex shapes, or products with varying thickness or highly thick products, to say nothing of simple shapes.

Abstract: A method for forming molded articles in any shape from ceramic, glass, or metal powders which comprises: preparing a slurry by dispersing more than one powder selected from a group consisting of ceramic, glass, and metal materials in a dispersing medium using a dispersing agent, and curing by adding a reactive substance that reacts with the dispersing agent to make the dispersibility of the dispersing agent disappear or lower.

Abstract: The present invention includes a method for freeze molding, comprising the steps of: mixing poly(vinyl alcohol) or a modified additive thereof with a material slurry to obtain a mixture; pouring the mixture into a molding die; and subjecting the mixture in a molding die to at least one cycle of cooling and heating so as to obtain a compact. A compact obtained in this method is free from melting and can maintain its configuration even if the compact is kept at a temperature of freezing point or higher. Further, since the method does not require vacuum drying, the compact can easily be dried.

Abstract: A forming process utilizing liquid absorption by a liquid-absorbing substance, includes preparing a liquid mixture containing at least one substance dispersible or soluble in the liquid mixture, a liquid capable of dispersing or dissolving the at least one substance, and a liquid-absorbing substance capable of absorbing the liquid by itself or when modified, and placing the liquid mixture in a mold and allowing the substance to absorb the liquid to obtain a formed material. In the forming process, the moldability is not influenced by the particle shape, particle diameter or particle size distribution of the at least one substance dispersible or soluble in the liquid, and the formed material obtained by said process has no internal strain and is homogeneous and elastic.