Abstract: A kiln tool plate for firing a ceramic material used during the firing of an article to be fired, where at least uneven conformations are imparted to a front surface side on which the article to be fired is mounted and a back surface side, and opening areas are formed. In the ceramic material firing kiln tool plate, the decrease of heat capacity and the reduction of costs can be achieved, a contact area with the article to be fired is decreased to improve outgassing, and the atmosphere can be made uniform to uniformly manufacture the fired article. Above all, the kiln tool plate for firing the ceramic material has excellent thermal shock resistance, creep resistance, high strength at high temperature and oxidation resistance, and enables weight saving.

Abstract: A shelf assembly for firing including plural struts for supporting shelf boards arranged upright in two or more rows in a cross direction and in three or more rows in a longitudinal direction on a longitudinally-long car with tie-beams connecting the struts. A thermal stress relief structure is provided in which the struts arranged upright in the adjacent rows in the longitudinal direction are connected only with tie-beams slanted in a cross direction between the struts, with the thermal stress relief structure preventing warpage or damage of the struts resulting from a bending stress generated in the longitudinal direction at the fixing parts of the struts.

Abstract: A non-settling refractory mortar is provided, which includes 100 mass % of a ceramic powder such as cordierite, mullite, alumina, or silicon carbide, 0.5 to 1.5 mass % of a clay mineral, and a colloidal oxide solution, in which the Ca content in the total solid component is defined at 0.01 to 0.5 mass % as converted to oxide so as to be provided with a thixotropic property. As a result, the coating performance is not lowered if stored for a long period after kneading, the dimension change rate after coating is small, and cracks or gaps are not formed on the coat surface. The median diameter of ceramic powder is preferred to be 10 to 50 ?m, and in order to reduce the dimension change rate after coating, the content of particles of 0.1 to 5 ?m in ceramic powder is desired to be 1 to 20%.

Abstract: A kiln tool plate 1 for firing a ceramic material used during the firing of an article to be fired, wherein at least uneven conformations 3 are imparted to a front surface side A on which the article to be fired is mounted and a back surface side B, and opening areas 7 are formed. In the ceramic material firing kiln tool plate 1, the decrease of heat capacity and the reduction of costs can be achieved, a contact area with the article to be fired is decreased to improve outgassing, and the atmosphere can be made uniform to uniformly manufacture the fired article. Above all, the kiln tool plate for firing the ceramic material has excellent thermal shock resistance, creep resistance, high strength at high temperature and oxidation resistance, and enables weight saving.

Abstract: A monolithic refractory material is provided by a method including the steps of kneading cordierite powder having a median diameter in a range of 10 to 50 ?m, and having a sharp mountain-like particle size distribution in which the content of particles smaller than 10 ?m is 1% or more to 36% or less, the content of particles ranging from 10 ?m or more to 50 ?m or less is 50% or more to 75% or less, and the content of particles of 51 ?m or more is 1% or more to 14% or less, and a solvent including water and alumina sol or silica sol solution.

Abstract: A refractory mortar cured material is formed in the surface or joint portions of a ceramic refractory material, such as fire bricks used in the lining of melting furnace or firing furnace used at high temperature, and includes ceramic particles with an inorganic binder having silanol group that are kneaded together with water. The kneaded mortar is applied on the surface of a ceramic base material. The average particle size of ceramic particles in the refractory mortar is 10 to 50 ?m, and the difference between the 90% particle size and the 10% particle size is 10 ?m or more to 60 ?m or less. The average pore size of the refractory mortar cured material is 5 to 25 ?m, and the width of pore size distribution is 20 to 80 ?m, so that the cracks are suppressed. In addition, the bulk density is 0.9 to 1.5 g/cm3.

Abstract: A Si—SiC based fired body includes a plurality of silicon carbide (SiC) particles serving as an aggregate, and silicon (Si) which serves as a binder and which is filled into gaps between the above-described silicon carbide particles, wherein the maximum particle diameter of the above-described silicon carbide particles is 0.5 mm or more, the content of silicon is 5 to 40 percent by mass, and the porosity is 0 to 5%. Preferably, the Si—SiC based fired body is in a thick-walled shape having a thickness of 20 to 200 mm.

Abstract: A shelf assembly for firing includes: plural struts for supporting shelf boards arranged upright in two or more rows in a cross direction and in three or more rows in a longitudinal direction on a longitudinally-long car; and tie-beams connecting between the struts. A thermal stress relief structure is provided in which the struts arranged upright in the adjacent rows in the longitudinal direction are connected only with tie-beams slanted in a cross direction between the struts, thereby solving the problems such as warpage or damage of the struts resulting from a bending stress generated in the longitudinal direction at the fixing parts of the struts whose tops are secured.

Abstract: A filtering medium for molten metal which is excellent in inclusion removal performance and durability and further may provide sufficient throughput and a method for producing the same. A filtering medium for molten metal in the present invention includes a two-layered structure of a macropore ceramic layer at the inflow side and a micropore ceramic layer at the outflow side. The average pore diameter of the micropore ceramic layer is from 100 to 500 ?m and the average pore diameter of the macropore ceramic layer is 1.1 to 3.0 times as large as that of the micropore ceramic layer. When respective layers are formed of aggregates bonded with an inorganic binder and the inorganic binder has a needle crystal structure with an aspect ratio of 2 to 50, the inside of filtering medium may be contributed to the filtration and the compatibility between inclusion-trapping performance and lifetime may be ensured.

Abstract: The refractory mortar cured material of the invention formed in the surface or joint portions of a ceramic refractory material such as fire bricks used in the lining of melting furnace or firing furnace used at high temperature is composed by kneading ceramic particles with an inorganic binder having silanol group together with water, and forming the kneaded mortar on the surface of a ceramic base material. The average particle size of ceramic particles in the refractory mortar is 10 to 50 ?m, the difference of 90% particle size and 10% particle size is 10 ?m or more to 60 ?m or less, the average pore size of the refractory mortar cured material is 5 to 25 ?m, and the width of pore size distribution is 20 to 80 ?m, so that the cracks may be suppressed. More preferably, the bulk density is 0.9 to 1.5 g/cm3.

Abstract: The non-settling refractory mortar of the invention contains 100 parts of ceramic powder such as cordierite, mullite, alumina, or silicon carbide, 0.5 to 1.5 parts of clay mineral, and colloidal oxide solution, in which the Ca content in total solid component is defined at 0.01 to 0.5% as converted to oxide so as to be provided with thixotropic property. As a result, the coating performance is not lowered if stored for a long period after kneading, the dimension change rate after coating is small, and cracks or gaps are not formed on the coat surface. The median diameter of ceramic powder is preferred to be 10 to 50 ?m, and in order to reduce the dimension change rate after coating, the content of particles of 0.1 to 5 ?m in ceramic powder is desired to be 1 to 20%.

Abstract: The invention relates to a Monolithic refractory material used in refractories and refractory ceramic products, and more particularly to a Monolithic refractory material having low expansibility, high strength, and crack extension resistance used for the purpose of repairing, protecting, modifying, filling, and forming the surface, adhesive surface, interface, or joint of low-expansion fire bricks and refractory ceramic products. The Monolithic refractory material of the invention is a Monolithic refractory material prepared by kneading cordierite powder, having a median diameter in a range of 10 to 50 ?m, and a sharp mountain-like particle size distribution in which the content of particles smaller than 10 ?m is 1% or more to 36% or less, the content of particles ranging from 10 ?m or more to 50 ?m or less is 50% or more to 75% or less, and the content of particles of 51 ?m or more is 1% or more to 14% or less, and a solvent composed of water and alumina sol or silica sol solution.

Abstract: A silicon nitride-bonded SiC refractory is provided, which includes SiC as a main phase and Si3N4 and/or Si2N2O as a secondary phase and which has a bending strength of 150 to 300 MPa and a bulk density of 2.6 to 2.9. A method for producing a silicon nitride-bonded SiC refractory is also provided, which comprises a step of mixing 30 to 70% by mass of a SiC powder of 30 to 300 ?m as an aggregate, 10 to 50% by mass of a SiC powder of 0.05 to 30 ?m, 10 to 30% by mass of a Si powder of 0.05 to 30 ?m, and 0.1 to 3% by mass, in terms of oxide, of at least one member selected from the group consisting of Al, Ca, Fe, Ti, Zr and Mg.

Abstract: A Si—SiC based fired body includes a plurality of silicon carbide (SiC) particles serving as an aggregate, and silicon (Si) which serves as a binder and which is filled into gaps between the above-described silicon carbide particles, wherein the maximum particle diameter of the above-described silicon carbide particles is 0.5 mm or more, the content of silicon is 5 to 40 percent by mass, and the porosity is 0 to 5%. Preferably, the Si—SiC based fired body is in a thick-walled shape having a thickness of 20 to 200 mm.

Abstract: The present invention provides a silicon nitride-bonded SiC refractory which contains SiC as a main phase and Si3N4 and/or Si2N2O as a secondary phase and which has a bending strength of 150 to 300 MPa and a bulk density of 2.6 to 2.9, and a method for producing a silicon nitride-bonded SiC refractory, which comprises a step of mixing 30 to 70% by mass of a SiC powder of 30 to 300 ?m as an aggregate, 10 to 50% by mass of a SiC powder of 0.05 to 30 ?m, 10 to 30% by mass of a Si powder of 0.05 to 30 ?m, and 0.1 to 3% by mass, in terms of oxide, of at least one member selected from the group consisting of Al, Ca, Fe, Ti, Zr and Mg. According to the silicon nitride-bonded SiC refractory and the method for production thereof, there can be obtained a refractory which has heat resistance, thermal shock resistance and oxidation resistance and which is high in strength and superior in creep resistance and thermal conductivity.

Abstract: A high thermal conductive material includes substantially silicon carbide and metal silicon, and preferably is formed by impregnating the space between the bonded silicon carbide crystals with the metal silicon. The production process comprises adding an organic binder and a dispersant or a binder having a dispersing effect to a silicon carbide powder to obtain a mixture, forming the mixture by cast forming or pressure forming to obtain a formed product, treating the formed product with heat at 2,100–2,500° C. for 1–5 hours to obtain a base material, impregnating the base material with an organic resin, treating the base material with heat, and impregnating the base material with metal silicon at 1,450–1,800° C. under reduced pressure.

Abstract: A high thermal conductive material includes substantially silicon carbide and metal silicon, and preferably is formed by impregnating the space between the bonded silicon carbide crystals with the metal silicon. The production process comprises adding an organic binder and a dispersant or a binder having a dispersing effect to a silicon carbide powder to obtain a mixture, forming the mixture by cast forming or pressure forming to obtain a formed product, treating the formed product with heat at 2,100-2,500° C. for 1-5 hours to obtain a base material, impregnating the base material with an organic resin, treating the base material with heat, and impregnating the base material with metal silicon at 1,450-1,800° C. under reduced pressure.

Abstract: A fiber-composite material includes: 55-75 wt % of carbon, 1-10 wt % of silicon and 10-50 wt % of silicon carbide, and the matrices including Si—SiC-based materials formed integrally among assemblages of yarns include carbon fibers integrally formed and combined three-dimensionally so as not to separate from each other. The fiber-composite material has a coefficient of kinetic friction of 0.05-0.6 and a porosity of 0.5-10%.

Abstract: A fiber-composite material includes: 55-75 wt % of carbon, 1-10 wt % of silicon and 10-50 wt % of silicon carbide, and the matrices comprising Si—SiC-based materials formed integrally among assemblages of yarns comprising carbon fibers integrally formed being combined three-dimensionally so as not to separate from each other. The fiber-composite material has a coefficient of kinetic friction of 0.05-0.6 and a porosity of 0.5-10%.

Abstract: A rectangular spalling-resistant refractory setter for use in heating furnace, which is made of a material having a bending strength of 1,000 kgf/cm.sup.2 or higher at 1,000-1,300.degree. C. and which has slits extending from each of at least one pair of the parallel sides of the setter toward the opposite side in a length of 15-35% based on the length of each side which is parallel to the slit.A creep-resistant setter which is made of a Si--SiC sintered material containing controlled amounts of impurities and having a controlled porosity.An oxidation-resistant setter which is made of a Si--SiC sintered material containing controlled amounts of impurities and having a controlled porosity.These setters are superior in spalling resistance, creep resistance and oxidation resistance, can mount thereon an increased amount of materials to be fired, and give a higher firing efficiency.