63results about How to "Good pore connectivity" patented technology

Substantially non-microcracked, porous, cordierite ceramic honeycomb bodies are provided. Although exhibiting moderately high thermal expansion (CTE) between 7×10−7 to 16×10−7 / ° C. (25-800° C.), the honeycomb bodies exhibit relatively high thermal shock parameter (TSP), such as TSR≧525° C. by virtue of a high MOR / E ratio, and / or low Eratio=ERT / E1000° C. and well interconnected porosity, as witnessed by a relatively high pore connectivity factor (PCF). A method of manufacturing the honeycomb ceramic structure is also provided.

Substantially non-microcracked, porous, cordierite ceramic honeycomb bodies are provided. Although exhibiting moderately high thermal expansion (CTE) between 7×10−7 to 16×10−7 / ° C. (25-800° C.), the honeycomb bodies exhibit relatively high thermal shock parameter (TSP), such as TSR≧525° C. by virtue of a high MOR / E ratio, and / or low Eratio=ERT / E1000° C. and well interconnected porosity, as witnessed by a relatively high pore connectivity factor (PCF). A method of manufacturing the honeycomb ceramic structure is also provided.

A diesel particulate filter having a honeycomb body composed of cordierite and exhibiting a CTE (25-800° C.) of less than 13×10−7 / ° C.; a median pore diameter, d50, of less than 25 μm; % porosity not less than 53%; and a narrow pore size distribution wherein a value of d50<sup2>−< / sup2>d10) / d50 is not greater than 0.6; and a value of d90 less than 40 μm wherein d10, and d90 are pore diameters at 10% and 90% of the pore size distribution on a volumetric basis, and d10<d50<d90. The particulate filter preferably exhibits a plugged, wall-flow honeycomb filter body composed of cordierite and having a plurality of parallel end-plugged cell channels traversing the body from a frontal inlet end to an outlet end thereof.

The invention relates to a carbon material with mesopores of 2 to 20 nm and high porosity, a carbon / metal oxide composite material in which metal oxides are deposited in carbon pores by using the carbon material, and an electric double made of the carbon material. A layer capacitor and an electrochemical capacitor made using the carbon / metal oxide composite material. When mesoporous carbon is used as an electrode material for an electric double-layer capacitor, the electric double-layer capacitor is superior to existing electric double-layer capacitors due to its low equivalent series resistance, although its capacitance value per unit weight is low due to its low surface area. Has a higher charge storage capacity. Moreover, when the carbon / metal oxide composite material is used as an electrode material of an electric double-layer capacitor, the capacitor has a higher capacitance value per unit weight through the combination of the electric double-layer capacitor and the metal oxide pseudocapacitor, that is, 254F / g.

Substantially non-microcracked, porous, cordierite ceramic honeycomb bodies are provided. Although exhibiting moderately high thermal expansion (CTE) between 7×10−7 to 16×10−7 / ° C. (25-800° C.), the honeycomb bodies exhibit relatively high thermal shock parameter (TSP), such as TSR≧525° C. by virtue of a high MOR / E ratio, and / or low Eratio=ERT / E1000° C. and well interconnected porosity, as witnessed by a relatively high pore connectivity factor (PCF). A method of manufacturing the honeycomb ceramic structure is also provided.

A diesel particulate filter having a honeycomb body composed of cordierite and exhibiting a CTE (25-800° C.) of less than 13×10−7 / ° C.; a median pore diameter, d50, of less than 25 μm; % porosity not less than 53%; and a narrow pore size distribution wherein a value of d50-d10) / d50 is not greater than 0.6; and a value of d90 less than 40 μm wherein d10, and d90 are pore diameters at 10% and 90% of the pore size distribution on a volumetric basis, and d10<d50<d90. The particulate filter preferably exhibits a plugged, wall-flow honeycomb filter body composed of cordierite and having a plurality of parallel end-plugged cell channels traversing the body from a frontal inlet end to an outlet end thereof.

The invention discloses a biomacromolecule / chitin nanocrystalline composite scaffold material and a preparation method thereof. Being a blend, the biomacromolecule / chitin nanocrystalline composite scaffold material comprises a biodegradable macromolecule and chitin nanocrystalline in a mass ratio of 1:10-1:100. The biodegradable macromolecule / chitin nanocrystalline composite bone tissue scaffold material is prepared by a freezing / pore-foaming agent leaching method. The composite scaffold has an average porosity of greater than 85%, the pore diameter is regulatable, and the compression modulus is 2MPa-12MPa. By introducing chitin nanocrystalline into a biomacromolecule porous scaffold, the mechanical strength and bioactivity of the scaffold are improved, and the adhesion of cells on the scaffold and the mineralization activity are promoted. The biomacromolecule / chitin nanocrystalline composite scaffold can be applied in the bone repair field as a bone tissue engineering scaffold.

The invention provides 3D printing porous zirconia ceramic and a preparation method thereof, and belongs to the technical field of advanced ceramic materials and additive manufacturing. Zirconia powder serves as a main raw material, the 3D printing zirconia porous ceramic is prepared through photocuring 3D printing and high-temperature glue discharging sintering, rapid and accurate forming of theporous zirconia ceramic can be achieved by accurately controlling the content of the zirconia powder, parameters of photocuring printing and the specific process of high-temperature glue discharging sintering, the pore channel structure is controllable, and ceramic products with complex structures and shapes can be prepared; the method does not need a mold, a pore-forming agent or a pore-forming template, and is low in preparation cost and high in production efficiency. The 3D printing porous zirconium oxide ceramic product prepared by the method is good in mechanical property, high in porosity, thin in pore wall, large in surface area and high in pore passage connectivity, and can be widely applied to the industrial field as a filter, a catalyst carrier, a heat exchanger, a heat accumulator, a bone tissue engineering bracket and the like.

A diesel particulate filter comprising a plugged, wall-flow honeycomb filter body composed of cordierite and having a plurality of parallel end-plugged cell channels traversing the body from a frontal inlet end to an outlet end thereof, wherein the filter exhibits a CTE (25-800° C.) of less than 13×10−7 / ° C., a bulk filter density of less than 0.60 g / cm3, a median pore diameter, d50, of less than 25 micrometers, a porosity and pore size distribution that satisfy the relationship Pm≦3.75, wherein Pm is equal to 10.2474{1 / [(d50)2(1 / oporosity / 100)]}+0.0366183(d90)−0.00040119(d90)2+0.468815(100 / % porosity)2+0.0297715(d50)+1.61639(d50−d10) / d50, wherein d10, and d90 are pore diameters at 10% and 90% of the pore size distribution on a volumetric basis, and d10<d50<d90. A method of making the same is also provided.

A preparation method for a porous beta-TCP ceramic / gelatin composite material belongs to the field of preparation of artificial bone scaffold materials. Concretely, the preparation method is used to prepare the porous beta-TCP ceramic / gelatin composite material of which the structure and the composition are similar to those of natural bone. According to the preparation method, a foaming process is employed for preparing porous beta-TCP, a high-temperature adhesive K2HPO4 is added for improving the scaffold strength, and a porous beta-TCP support is combined with gelatin for improving the strength and the toughness of the porous support, and thus the porous beta-TCP ceramic / gelatin composite material of which the structure and the composition are similar to those of natural bone is prepared. The porous beta-TCP ceramic / gelatin composite material prepared by the preparation method has the advantages of good pore connectivity, high porosity, high water absorption rate, high compressive strength and the like, the composition and the structure of the composite scaffold are similar to those of natural bone, and the composite scaffold has wide application prospect.

The invention discloses a composite foundation composed of a rubble / sand inverted filter layer and porous concrete piles and a treatment method. The exterior structure of the foundation is the rubber / sand inverted filter layer, and the interior of the foundation is porous concrete. The pile diameter is 0.3 m-0.8 m, and the thickness of the rubble / sand inverted filter layer outside the piles is 0.2 m-0.4 m. After underwater maintenance for 28 days, the compressive strength of the porous concrete is not lower than 5 MPa, the permeability coefficient is not lower than 5 mm / s, the pile spacing is 3-5 times of the pile diameter, and the porosity rate of the porous concrete is greater than 20 percent. The treatment method of the foundation comprises the steps that according to the requirements for foundation settlement and bearing capacity, the pile diameter, the pile spacing, the foundation reinforcement range, the reinforcement depth, the pile arrangement mode, the amount of packing in pile holes and the thickness of pile top granular materials or wet clay are determined, and piles are constructed. According to the composite foundation, the problem that the porous concretes are blocked by slurry is effectively weakened; the rubble / sand inverted filter layer plays a role in water permeability and inverted filtering, and therefore the piles can be drained continuously and effectively in the composite foundation.

The invention discloses a high-strength self-lubricating metal ceramic bearing. The high-strength self-lubricating metal ceramic bearing is prepared from, by weight, 2.3-2.4 parts of ferric citrate, 3.1-3.5 parts of basic nickel carbonate, 25-30 parts of water, an appropriate amount of ammonium hydroxide, 2.9-3 parts of TiH2, 1.1-1.3 parts of nanocarbon, 15-15.4 parts TiC, 0.7-0.9 part of lubricant, 1-1.1 parts of C, 3.9-4.1 parts of Cr, 5.8-6 parts of W, 5.1-5.3 parts of Mo, 3.1-3.3 parts of V and 65-66 parts of Fe. Ferric citrate and basic nickel carbonate are used for carrying out coating modification on TiC, the bonding strength of a ceramic phase and a metal phase is improved, and the strength and the toughness of the bearing are greatly improved. Nanocarbon, ferrocene acetyenic ketone and ferric alginate are adopted, so that the lubricating performance and compactness in the pressing process are improved, the pore connectivity of sintered materials is good, the show porosity is improved, and the wear resistance of the bearing is extremely good.