NGK Adrec Co., Ltd. Patent applications |
Patent application number | Title | Published |
20100133220 | SHELF ASSEMBLY FOR FIRING - 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. | 06-03-2010 |
20100025324 | FILTERING MEDIUM FOR MOLTEN METAL AND METHOD FOR PRODUCING THE SAME - 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 μm 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. | 02-04-2010 |
20090169848 | REFRACTORY MORTAR CURED MATERIAL - 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 μm, the difference of 90% particle size and 10% particle size is 10 μm or more to 60 μm or less, the average pore size of the refractory mortar cured material is 5 to 25 μm, and the width of pore size distribution is 20 to 80 μm, so that the cracks may be suppressed. More preferably, the bulk density is 0.9 to 1.5 g/cm | 07-02-2009 |
20090149311 | MONOLITHIC REFRACTORY MATERIAL HAVING LOW EXPANSIBILITY, HIGH STRENGTH, AND CRACK EXTENSION RESISTANCE - 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 μm, and a sharp mountain-like particle size distribution in which the content of particles smaller than 10 μm is 1% or more to 36% or less, the content of particles ranging from 10 μm or more to 50 μm or less is 50% or more to 75% or less, and the content of particles of 51 μm or more is 1% or more to 14% or less, and a solvent composed of water and alumina sol or silica sol solution. | 06-11-2009 |
20090145334 | NON-SETTLING REFRACTORY MORTAR - 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 μm, and in order to reduce the dimension change rate after coating, the content of particles of 0.1 to 5 μm in ceramic powder is desired to be 1 to 20%. | 06-11-2009 |
20090011178 | HONEYCOMB STRUCTURE AND BONDING MATERIAL TO BE USED FOR SAME - There is disclosed a honeycomb structure | 01-08-2009 |
20080254271 | Si-SiC BASED FIRED BODY AND METHOD FOR MANUFACTURING THE SAME - 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. | 10-16-2008 |