摘要:
A method of manufacturing a cordierite-based honeycomb structure, comprising: adding an alumina source material, a silica source material and a magnesia source material to obtain a cordierite forming material; obtaining a clay by use of the resultant cordierite forming material; extruding the resultant clay into a honeycomb shape to obtain a formed honeycomb body; drying the resultant formed honeycomb body to obtain a dried honeycomb body; and firing the resultant dried honeycomb body to manufacture the cordierite-based honeycomb structure, wherein a first alumina source material having a degree of circularity of 0.70 or more and an average particle diameter of 1 to 10 μm is added as at least the alumina source material in an amount of 10 mass % or more with respect to the total mass of the cordierite forming material to obtain the cordierite forming material.
摘要:
A honeycomb structure 10 of the present invention is provided with porous partition walls 12 made of a ceramic material containing cordierite as a main crystal phase and separating and forming a plurality of cells 14 functioning as fluid passages. The partition walls 12 contain sodium at 0.08 to 0.15 mass % in terms of sodium oxide. A honeycomb structure having a large average pore size can be provided.
摘要:
A honeycomb filter including partition walls having a porous partition wall base material and a surface layer provided on only inflow side or both inflow and outflow sides of the partition wall base material, and satisfying the following conditions capable of using as a DPF. The surface layer has a peak pore diameter of from 0.3 μm to 20 μm (exclusive) being equal to or smaller than the average pore diameter of the base material; the porosity of from 60% to 95% (exclusive) when measured by mercury porosimetry being larger than that of the base material; and the thickness L1 of from 0.5% to 30% (exclusive) of the partition wall thickness L2; and mass per filtration area of from 0.01 mg/cm2 to 6 mg/cm2 (exclusive). The base material has an average pore diameter of from 10 μm to 60 μm (exclusive) and a porosity of from 40% to 65% (exclusive).
摘要翻译:一种蜂窝过滤器,包括具有多孔分隔壁基材的分隔壁和仅在分隔壁基材的流入侧或流入侧和流出侧设置的表面层,并且满足能够用作DPF的以下条件。 表面层的峰值孔径为0.3μm〜20μm,(专用)等于或小于基材的平均孔径; 当通过水银孔隙率法测量时,孔隙率为60%至95%(排除)大于基体材料的孔隙率; 并且分隔壁厚度L2的厚度L1为0.5%至30%(排除); 每个过滤面积的质量为0.01mg / cm 2至6mg / cm 2(排他性)。 基材的平均孔径为10〜60μm(排他性),孔隙率为40〜65%(排他性)。
摘要:
There is disclosed a ceramic structure which comprises a material having a controlled pore distribution and including cordierite as the main crystal phase. In the pore distribution, the volume of pores having pore diameters smaller than 20 μm accounts for 15% or less of the total pore volume, and the volume of pores having pore diameters of 20 to 100 μm accounts for 70% or more of the total pore volume. This ceramic structure is suitable for realizing a ceramic catalyst body which has excellent purification efficiency, is reduced in pressure loss, and is mountable even in a limited space.
摘要:
A system provided in accordance with the present invention comprises a sever unit (100), which serves as an apparatus for processing information concerning a biological condition information, and a client unit (200), which serves as an information terminal of a provider of the information on the biological condition communicably connected to the server unit (100) via a network (300). The server unit (100) determines a composite index reflecting a plurality of metabolites indicative of the biological condition based on the information on the biological condition acquired from the client unit (200).
摘要:
A process for producing a honeycomb structure by obtaining clay from a cordierite-forming raw material containing an alumina source, a silica source, and a magnesia source; and forming the clay into a honeycomb shape, wherein a material having, in its volume particle size distribution, a 50 volume % particle size (V50) [μm] of 1 to 25 μm is used, as each of alumina source, silica source, and magnesia source; and a material having, in the volume particle size distribution of the whole cordierite-forming raw material, a ratio of 90 volume % particle size (Vall90) [μm] to 10 volume % particle size (Vall10) [μm] [a volume particle size distribution ratio (Vall90/Vall10)] of 10 or less and a difference (Vall90−Vall10) between 90 volume % particle size (Vall90) [μm] and 10 volume % particle size (Vall10) [μm] of 25 μm or less is used, as the cordierite-forming raw material.
摘要:
There is provided a method for manufacturing a silicon carbide based honeycomb structure, the method using, as a part of a starting material, a recycled raw material recycled from a recovered material generated in a process for manufacturing the silicon carbide based honeycomb structure and derived from a starting material for a silicon carbide based honeycomb structure; wherein the recycled raw material is pulverized to have an average particle size of 10 to 300 μm. According to the present invention, structure defects such as voids or coarse particles, which have been problems upon manufacturing a silicon carbide based honeycomb structure, are hardly formed, and a silicon carbide based honeycomb structure having excellent strength and uniform heat conductivity can be obtained. In addition, since a once kneaded material is used as a part of a starting material, the time for kneading can be shortened.
摘要:
There is provided a method for manufacturing a porous ceramic structure, including: firing a formed body containing ceramic particles and a combustible powder functioning as a pore former, and burning off the combustible powder to obtain the porous ceramic structure. The combustible powder has an exothermic rate of 0 to 35 μV·min./mg, which is obtained from a differential thermal analysis. The method for manufacturing a porous ceramic structure can inhibit a crack from being generated during firing even without slowing down the temperature rise rate at the combustion range of the pore former or without lowering an oxygen content in the firing atmosphere.
摘要:
A method for manufacturing a porous ceramic structure which can produce a high porosity ceramic structure as well as a low porosity ceramic structure without causing cracks at the time of firing. A method for manufacturing a porous ceramic structure comprising molding a raw material which contains a ceramic material as a main component and a pore-forming agent and then drying and firing the obtained molded article. When the molded article is fired, the temperature of a firing environment is raised substantially in synchronization with the temperature of the central portion of the molded article within a temperature range in which at least a portion of the molded article is shrunk by firing.
摘要:
In a hepatic disease-evaluating apparatus, an indicator calculating unit calculates an index indicating the degree of hepatic fibrosis from amino acid concentration data to be evaluated including amino acid concentration value, based on one or more indices of fractional expression having amino acid concentration as variable. A disease state evaluating unit evaluates the disease state of the hepatic disease to be evaluated, based on the index value.