5results about How to "Good pore connectivity" patented technology

The invention belongs to the technical field of coal bed gas exploitation, relates to a self-energizing activated drainage gas recovery process, and introduces a self-energizing technology and a fracturing exploitation technology. In other words, before the self-energizing activator is injected, the fracturing technology is adopted to exploit the coal seam, high-pressure liquid or gas is injected into the coal seam, the coal seam is fractured, cracks are opened, and new cracks and channels are created. The self-energizing activator can increase the permeability of the coal bed, improve the pore connectivity, increase the release rate and collection efficiency of the coal bed gas, increase the quantity of the collected coal bed gas and reduce the waste of coal bed gas resources.

The application discloses a DMAA gel system gel injection molding-non-pressure sintering porous Si3N4 ceramic and a preparation method thereof, and relates to the technical field of porous ceramic materials. The ceramic comprises, in terms of mass fractions, alpha-Si3N4 powder, Y2O3-CeO2 composite sintering aid, polymethyl methacrylate pore-forming agent, N, N-dimethyl acrylamide-N, N'-methylene bisacrylamide gel system, dispersant, initiator and deionized water. Through the synergistic effect of the DMAA low-toxicity gel system, the PMMA spherical pore-forming agent, the Y2O3-CeO2 composite aid and the step sintering process, the porosity is continuously adjustable, the bimodal pore size distribution and the high pore connectivity are realized, the bending strength is improved under the same porosity, the fracture toughness is improved, the technical bottleneck that high pores must have low strength is broken, and the ceramic is suitable for high-temperature filtration, catalytic carriers, aerospace and other fields.

This invention relates to a seedling substrate made from distiller's grains and its preparation process. The substrate comprises, by weight, 40-60 parts distiller's grains, 25-35 parts coconut coir, 7-12 parts perlite, 7-12 parts humic acid, 5-15 parts bamboo fiber with mycotoxin, and 0.4-0.8 parts iron oxide granules. The preparation steps are as follows: S1, fermenting the distiller's grains; S2, initially mixing the distiller's grains, coconut coir, and humic acid in a biaxial mixer to form a preliminary mixed substrate; S4, adding the preliminary mixed substrate, perlite, bamboo fiber with mycotoxin, and iron oxide granules into a three-dimensional mixer, mixing at 20-30 rpm for 30 minutes, adjusting the moisture content to 30-40%, and adjusting the pH to 6.0-7.0; S5, magnetizing the iron oxide granules. The seedling substrate of this invention has good air permeability, rich nutrients, and promotes root growth.

This invention relates to the field of silicone technology, specifically to a silicone composite thermally conductive material and its preparation process. The preparation process of a silicone composite thermally conductive material includes: pretreatment of graphene filler, preparation of modified graphene filler, preparation and modification of heterogeneous filler, and preparation of the silicone composite thermally conductive material. This invention utilizes modified graphene and the construction of a boron nitride-silica heterogeneous filler to form a multi-level thermally conductive network. Combined with electric field-induced ordered arrangement of fillers and pretreatment of graphene with chemically reduced gel and directional ice template, multiple methods are used synergistically to reduce interfacial thermal resistance and phonon scattering, constructing continuous thermally conductive channels. Simultaneously, it improves the structural uniformity, thermal conductivity stability, and mechanical properties of the composite material, effectively solving problems such as filler agglomeration and migration, and significantly improving the thermal conductivity of the silicone composite material.

The invention discloses an alumina ceramic ball with a communicated micropore structure and a preparation method and application thereof, and relates to the technical field of catalyst carriers. The ceramic ball takes aluminum oxide as a main raw material, and the content of the aluminum oxide is greater than or equal to 90wt%; mutually communicated micropores are formed in the ceramic ball, the diameter of the micropores is 0.1-2 microns, and the aperture deviation is less than or equal to 15%; the specific surface area of the ceramic ball is greater than or equal to 300m < 2 > / g, the porosity is 30-50%, and the compressive strength is The ceramic ball successfully realizes ideal combination of a high specific surface area and a high strength characteristic, and provides a huge loading space and rich reaction active sites for a catalyst; meanwhile, the compressive strength can still be kept at 150 MPa or above, and the porosity is 30%-50%, which shows that the material has an extremely high specific surface area, the skeleton structure is still compact and firm, and the common technical contradiction of low strength caused by high porosity of a porous material is effectively overcome.