29 results about "Spherical pore" patented technology

The invention relates to a preparation method of an inorganic hollow fiber membrane and the inorganic hollow fiber membrane, and the preparation method comprises the following steps: a membrane casting solution preparation process: mixing inorganic powder, an additive, a pore-forming agent and a solvent to prepare a membrane casting solution, 100 parts by mass of the membrane casting solution contains 50-60 parts by mass of the inorganic powder, 5-15 parts by mass of the pore-forming agent, 5-8 parts by mass of the additive and the balance of the solvent; the prepared membrane casting solution forms an inorganic hollow fiber membrane precursor through a spinning technology, organic matters in the precursor are removed through a sintering process, and meanwhile, a uniform pore structure is formed in the membrane by burning off the spherical pore forming agent. And for a metal film in the inorganic hollow fiber membrane, the metal hollow fiber membrane can be obtained by continuously switching to roasting in a reducing atmosphere. The method for producing an inorganic hollow fiber membrane according to the present application can easily produce an inorganic hollow fiber membrane capable of achieving both high porosity and narrow pore size distribution.

The present application provides a kind of porous abradable seal coating and its preparation method, the porous abradable seal coating includes base phase coating and spherical hole, the spherical hole is uniformly distributed in the base phase coating, the aperture of the spherical hole is 10-150 μm.The porous abradable seal coating provided by the present application has spherical hole, and the spherical hole is not easy to densify in the surface in the abrading process, in the abrading process, the place where coating is impacted and rubbed because the existence of spherical hole occurs crushing and produces retreat, and does not affect the combination of other places of coating, thus improves the abradability of coating, so that the abradability of coating can be maintained well in the whole service process, prolongs the service life of coating.

The invention belongs to the technical field of grinding wheel abrasives, and particularly relates to a diamond porous microsphere, a grinding wheel abrasive and a preparation method and application thereof. The preparation raw materials of the diamond porous microspheres comprise mixed powder, a binder and water, the mixed powder comprises a first ceramic bond, diamond and a pore forming agent. The first ceramic bond, the diamond and the pore forming agent are used as raw materials for preparing the diamond porous microspheres, the diamond porous microspheres have natural pores and prefabricated spherical pores, the porosity is high, and the self-sharpening performance of the grinding wheel grinding material can be improved; the grinding wheel abrasive material is prepared through secondary air degreasing sintering of the diamond porous microspheres, a new three-dimensional pore structure is formed among the naturally stacked diamond porous microspheres, the grinding wheel abrasive material with a'natural pore + prefabricated spherical pore + stacked pore 'multi-stage pore structure is obtained, the cooling, lubricating and chip removal effects of a grinding wheel can be greatly improved, and the service life of the grinding wheel is prolonged. Therefore, the grinding performance and the service life of the grinding wheel are improved.

The invention belongs to the technical field of solid oxide fuel cells, and particularly relates to an electrode catalyst of a solid oxide fuel cell suitable for sulfur-containing fuel. The NiMo-YSZ electrode catalyst with the straight hole and spherical hole composite structure is prepared through a tape casting-phase conversion method and a vacuum-assisted impregnation process; the mass transfer efficiency and the specific surface area are improved by a composite pore structure in the obtained catalyst, and Mo actively captures sulfur by virtue of dual mechanisms of surface selective adsorption and bulk phase chemical sulfur fixation and can be dynamically regenerated. H2S can be reduced from 120 ppm to 14 ppm, and the removal rate reaches 88%; when the catalyst is operated in sulfur-containing hydrogen and methanol for 300 hours, the performance stability is respectively improved by 160% and 125%, the decline rate is as low as 0.4 mV / h, 98% of initial performance is regenerated and recovered, the tradeoff bottleneck of'activity-stability 'is broken through, and reliable support is provided for efficient and stable application of sulfur-containing hydrocarbon fuel SOFC (solid oxide fuel cell).

The invention discloses a porous GNP / PDMS composite material, a preparation method thereof and application of the porous GNP / PDMS composite material in a flexible sensor, and belongs to the technical field of flexible sensors and preparation of the flexible sensors. According to the preparation method, expanded polystyrene microspheres are taken as sacrificial templates to be combined with glucose, a spherical pore structure is constructed through a vacuum infiltration method, graphene is dispersed in a PDMS matrix by adopting a multi-step ultrasonic dispersion technology, and porous GNP / PDMS composite materials with different graphene contents are obtained. On the basis, a conductive electrode and a flexible packaging layer are combined to construct a high-sensitivity flexible sensor. Results show that the GNP / PDMS composite material containing 4 wt.% of graphene shows excellent mechanical properties, the elastic modulus is 2.43 MPa, the maximum tensile strength is 1.46 MPa, meanwhile, the recovery of more than 99.6% is maintained after 200 times of compression cycles, and the composite material shows very strong mechanical stability.

The invention discloses multi-element solid waste foam concrete and a preparation method thereof, and relates to the technical field of foam concrete. The multi-element solid waste foam concrete comprises slag, fly ash, ardealite, sodium dodecyl benzene sulfonate and water, the invention relates to an alkali-free concrete which comprises the following components in parts by mass: 250-350 parts of fly ash, 5-20 parts of aluminum powder and 0-20 parts of a liquid alkali-free accelerator, and further comprises the following components in parts by mass: 250-350 parts of fly ash, 5-20 parts of aluminum powder and 0-20 parts of a liquid alkali-free accelerator. Compared with the traditional foam concrete, the materials used in the invention are all industrial solid wastes, and cement is not doped, so that the carbon emission of cement production is reduced while the solid wastes are consumed and the solid waste stockpiling pressure is relieved. When the multi-element solid waste foam concrete is applied to an outer wall enclosure structure, due to the fact that the multi-element solid waste foam concrete is light in weight, has many spherical pores, excellent heat preservation performance and low dry density, the self-weight pressure of a high-rise building is reduced, cold and heat transmission paths are reduced, the heat conductivity coefficient is lower, and a large amount of energy consumed by refrigeration and heat is reduced.

The present invention aims to provide a method for preparing and applying a hydrotreating protectant for heavy residue oil, belonging to the field of catalyst preparation. The method includes the following steps: preparing an alumina sol and adding spherical carbon particles to the alumina sol; mixing the materials evenly and then forming droplets; drying and calcining the formed material to obtain an alumina support with spherical pores; hydrothermally treating the alumina support with spherical pores in an organic ammonium solution; drying and calcining the treated material to obtain another alumina support; impregnating the alumina support with an impregnation solution containing an active metal component; and drying and calcining the impregnated support to obtain the hydrotreating protectant. The hydrotreating protectant prepared by this method has large surface pores with good permeability and high internal pores that can accommodate metal impurities. This catalyst is suitable for the field of heavy residue oil hydrotreating.

The utility model discloses a high-temperature and high-pressure sealed electrical penetration assembly, relates to the technical field of electrical penetration assemblies, and is used for solving the problems that the existing penetration assembly is damaged due to factors such as vibration, thermal expansion and cold contraction in the operation process of a nuclear power station, and the stability of electric power and signal transmission cannot be ensured. The penetration piece comprises a glass sintering shell of a penetration piece main body part, wherein the glass sintering shell is connected with a flange through a clamping ring; a plurality of elastic steel ball assemblies are installed on the glass sintering assembly and matched with corresponding spherical holes in the flange to form a damping mechanism. And a combined metal O-shaped sealing ring is arranged on the end surface of one side of the glass sintering shell. Through the structural design, the radiation resistance, the high temperature resistance, the aging resistance and the sealing performance are improved, reliable electrical connection is provided in an extreme environment, and the problem that steering is needed in penetration piece installation is solved.

The invention belongs to the field of metal additive manufacturing, and relates to a preparation method of a formed test block containing prefabricated micropores, which comprises the following steps: 1) obtaining an initial base material sample containing a flat and smooth surface; (2) forming spherical holes in the flat and smooth surface of the initial base material sample in a machining manner; 3) filling the spherical holes with a sublimable material, and curing the sublimable material in the spherical holes; 4) sealing the spherical hole filled with the sublimable material to obtain a base material sample after hole sealing; and (5) continuously forming on the base material sample after hole sealing until a formed test block containing the prefabricated micropores is formed. The invention provides the preparation method of the formed test block containing the prefabricated micropores, which can be compatible with metal additive manufacturing process characteristics and can be used for accurately prefabricating the controllable pores.

The utility model relates to the technical field of lighting equipment, in particular to auxiliary lighting equipment for mining equipment maintenance, which comprises a base, a first powerful magnet is fixedly connected to the bottom end of the base, a U-shaped seat is rotatably connected to the top end of the base, a shell is rotatably connected to the middle of the U-shaped seat, and a lighting lamp is fixedly connected above one end of the shell. A clamping device is fixedly connected to one side of the shell, a second powerful magnet is fixedly connected to the upper portion of the other end of the shell, a containing groove is formed in the lower portion of the other end of the shell, a spherical hole is formed in the middle of the containing groove, a hook is rotatably connected to the interior of the spherical hole, and a spotlight is fixedly connected to the top end of the shell. During use, the LED lamp beads which are high in brightness and reasonably arranged are matched with the optical lens, so that the sufficient and uniform lighting effect can be achieved, all parts of mining equipment can be clearly lighted, and the maintenance efficiency is further improved.

This invention discloses a galvanometer mechanism and a laser processing apparatus. The galvanometer mechanism includes a carrier, a galvanometer, a drive module, and a first sealing member. The carrier has a mounting cavity and a spherical hole connecting the mounting cavity and the outside of the carrier. The galvanometer is disposed within the mounting cavity. The drive module is mounted in the spherical hole and partially extends into the mounting cavity to connect with the galvanometer. The drive module located within the spherical hole has a spherical surface, which rotatably engages with the spherical hole. The first sealing member is disposed between the hole wall and the spherical surface of the spherical hole and is arranged circumferentially around the drive module. The technical solution of this invention can achieve effective sealing of the optical path while simultaneously enabling galvanometer position adjustment.

The invention discloses functional bioactive glass as well as a preparation method and application thereof, and relates to the technical field of regenerative medical materials.The functional bioactive glass provided by the invention takes silicon, calcium, phosphorus and sodium as basic components, a porous structure is constructed by introducing nano zinc oxide (ZnO), and hydrophilicity and dispersity are improved by utilizing short amylose surface grafting. The nano zinc oxide is used as a pore-forming template and is selectively dissolved out in the subsequent steps to form sphere-like pores with the pore diameter of 1-30nm and the porosity of 30-70%, so that physical support is provided for cell adhesion and bone tissue ingrowth. The short amylose is grafted on the surface of the glass through a covalent bond of an amino silane coupling agent, and hydroxyl (-OH) on a molecular chain of the short amylose and water molecules form a hydrogen bond, so that the contact angle of the material is obviously reduced, and particle aggregation is effectively inhibited.

The application aims to provide a spherical alumina carrier and a preparation method thereof, and belongs to the technical field of material synthesis. 2 The alumina carrier prepared by the application has a surface covered with hexagonal plate-shaped alumina particles, the hexagonal plate-shaped alumina particles grow in a directional manner on the surface of the alumina carrier and in the micrometer spherical pores, the size of the hexagonal plate-shaped alumina particles is 0.5-1 micrometers, the plate-shaped particles are interwoven to form 100-600 nm channels, the specific surface area of the spherical alumina carrier is 160-290 m 2 / g, and the pore volume is 0.8-1.0 mL / g. The alumina carrier prepared by the application has an open surface channel, a body phase containing through macroporous channels, a uniform carrier morphology, high mechanical strength, and is easy to be filled into a reactor bed, and is suitable for preparing a catalyst for a heterogeneous catalytic reaction.

The application belongs to the technical field of lubricant additives, and particularly relates to boron-doped silica microspheres with a hierarchical pore structure, a preparation method thereof and application. The boron-doped silica microspheres with a hierarchical pore structure provided by the application have a regular spherical morphology, good dispersibility, stable structure, and two different size pore structures, including ordered spherical pores and randomly distributed nanopore structures; the coexistence of the two different size pore structures improves the oil storage capacity of the modified silica microspheres as lubricant additives, facilitates the transmission and diffusion of lubricating oil, and improves the lubricating effect. In the application, an organic complex formed by mixing a surfactant and an acrylic acid homopolymer is used as a template, a silicic acid skeleton is formed through the interaction between a silicon source and the organic template, boron is introduced into the skeleton through the interaction between the silicic acid and a boron source, and the synthesis of boron-doped hierarchical mesoporous silica microspheres is realized through drying and calcination.

The invention discloses a preparation method of a porous ceramic material for an electronic cigarette, and relates to the field of porous ceramic materials. Cotton fibers loaded with nano calcium carbonate are used as a pore-forming agent, after high-temperature sintering, the cotton fibers can be carbonized at high temperature to form pores, calcium carbonate can be further decomposed on the pores to form micron-sized spherical pores, a multi-stage structure of'large-pore oil guiding and small-pore oil locking 'is formed, meanwhile, a carbon skeleton can be left after the cotton fibers are carbonized, and the pore-forming effect is improved. Supporting and reinforcing effects can be achieved in the porous ceramic material, and the risk of breakage is reduced; the porous ceramic for the electronic cigarette is placed in a KH570 silane coupling agent solution, a layer of film is formed on the surfaces of calcium oxide and the ceramic, the wear resistance of the surfaces is improved, erosion of chemical components in tobacco tar can be resisted, the service life of the porous ceramic for the electronic cigarette is prolonged, the lipophilicity of the treated ceramic surface is improved, and the porous ceramic has better tobacco tar adsorption and release performance. According to the prepared porous ceramic material for the electronic cigarette, the strength and the oil guiding performance of the porous ceramic material are improved.

The invention discloses a one-dimensional hollow carbon nanomaterial constructed on the basis of spherical pores and a preparation method and application thereof, and belongs to the technical field of mesoporous materials.According to the method, Fe3O4 nanospheres are induced by a magnetic field to be assembled into a chain structure, after silicon dioxide is coated, super-assembly is conducted on the surface by means of PS-PEO-PVP block copolymer micelles, and the one-dimensional hollow carbon nanomaterial is obtained. And performing dopamine coating, high-temperature carbonization and template etching to obtain the one-dimensional hollow carbon nanomaterial with spherical macropores which are communicated with one another and ordered spherical mesopores which are uniformly distributed on the inner wall of the one-dimensional hollow carbon nanomaterial. The length of the material is 600 nm to 1 [mu] m, the dispersity is good, and the structure is adjustable. Experiments show that the composite material shows power generation voltage higher than that of commercial carbon nanotubes and excellent cycling stability in evaporation direct-current power generation, and has wide application prospects in the fields of efficient electrodes, catalyst carriers and the like.

The invention relates to a preparation method of a ceramic dental implant with a porous structure on the surface. The ceramic dental implant comprises an inner compact ceramic layer and an outer porous ceramic layer. The inner layer is formed by compounding 3Y-TZP zirconium oxide nano ceramic powder with nano hydroxyapatite, so that a high-strength substrate is ensured. The outer layer contains the same zirconia powder, micron hydroxyapatite and a dual-mode pore-forming agent, the pore-forming agent is composed of micron PMMA microspheres and micron PLGA fibers, a hierarchical pore structure with the thickness of 200-800 microns and the porosity of 40%-60% is formed, and spherical pores and a through pore channel network are integrated. A gradient transition area is arranged between the porous layer and the compact layer, the thickness is larger than or equal to 50 micrometers, the aperture is continuously decreased from 80 micrometers to 5 micrometers, and the content of hydroxyapatite is 10-20 vol%. According to the preparation method, structural control is achieved through layered powder filling, cold isostatic pressing forming and staged sintering, and the final implant has mechanical strength, bionic porosity gradient and efficient osseointegration activity.

Provided are: a porous film which is capable of satisfactorily removing minute foreign matter in a chemical liquid by filtration; a method for producing the porous film; and a method for producing a purified chemical liquid for use in the production of a semiconductor element, the method including performing filtration using the porous film.　The present invention uses a porous film in which at least a portion of the surface of a porous base film is coated with a coating layer containing a polyamide resin, wherein the porous base film has a plurality of spherical holes therein, in which the plurality of spherical holes are connected to adjacent spherical holes to form communicated holes.

The application provides a polyimide lithium battery diaphragm and a preparation method thereof, and relates to the technical field of lithium battery diaphragms. The diaphragm has spherical or ellipsoidal holes formed by the rupture of thermal expansion microspheres. The thermal expansion microspheres and a dispersing agent are dispersed in a polyamide acid solution, then the mixed slurry is made into a wet film, and the gelation of the polyamide acid and the expansion and rupture of the thermal expansion microspheres are simultaneously completed by cooperating with multi-stage temperature rising heat treatment, so that the average pore diameter and porosity of the holes of the required diaphragm can be obtained, the process is simple, and the process is suitable for large-scale production and preparation. The average pore diameter and porosity of the holes of the diaphragm are highly controllable in the process.

The utility model discloses a portable display board for financial publicity, which comprises two support plates distributed up and down, the support plates are connected through a support column, the outer side of the support column is rotatably provided with an air guide piece, the support column is sleeved with a shell with two open ends, the middle part of the shell is provided with a display board assembly groove, and the display board assembly groove is provided with an air guide piece. A flow guide groove is formed in the side face of the display board assembling groove, a connecting plate is arranged at the bottom of the shell, the bottom of a supporting plate below is connected with an adapter plate through a connecting column, a ball head is arranged below the adapter plate and rotatably installed in a spherical hole in a base, and the base is connected with the adapter plate through a rebound assembly. According to the utility model, the structural design is scientific and reasonable, the maintenance cost is greatly reduced, the main body consisting of the supporting plate and the supporting columns is used for supporting the shell, the openings are formed in the two ends of the shell, and the flow guide grooves are formed in the side surfaces of the shell, so that the air guide effect is achieved, and the airflow passing ability is improved.

A three-dimensional parametric modeling method of a fiber-woven multilayer heterogeneous C-ring structure, which realizes the full three-dimensional modeling of the multilayer heterogeneous matrix, fiber-woven preform and ellipsoidal pores in the fiber-woven multilayer heterogeneous C-ring composite material through a parametric modeling method. The method is suitable for all numerical simulation modeling involved in the composite material with fiber-woven preform, ellipsoidal pores and multilayer heterogeneous matrix. The modeling method steps are as follows: 1. setting the fiber-woven preform curve equation, fiber cross section, woven body layer number and other parameters. 2. establishing the three-dimensional model of the woven preform structure through the parametric method. 3. establishing the ellipsoidal pore model. 4. establishing the C-ring matrix model. 5. judging whether the matrix is a multilayer heterogeneous structure. 6. dividing the matrix layer. 7. deleting the pores in the ceramic matrix and combining the fibers and the ceramic matrix through Boolean operation to complete the modeling of the fiber-woven multilayer heterogeneous C-ring structure.

This invention relates to an ultra-low temperature ceramic binder, which is mainly composed of the following raw materials in the indicated mass percentages: Bi₂O₃: 40-80%, B₂O₃: 5-15%, ZnO: 10-35%, SiO₂: 0-5%, Li₂O: 0.5-3%, TiO₂: 0-5%, CaF₂: 2-10%, Y₂O₃: 0-5%. This binder can be fired at a minimum temperature of 400°C and softened at a minimum temperature of 320°C. It enables the ceramic binder to achieve bonding and consolidation before the polymeric pore-forming agent and temporary polymeric binder burn off, maintaining the integrity of the pore structure while achieving a high porosity. Furthermore, using this ceramic binder and a preferred polymeric pore-forming material, it is possible to construct spherical pores with interconnected microscopic gaps, and the pore size can be controlled during preparation.

A porous glass includes: a skeleton; and multi-directional communication pores. The multi-directional communication pores are spherical pores and in communication with at least six pores around a multi-directional communicating pore. In an embodiment, the multi-directional communication pores are in communication with six to twelve pores around the multi-directional communicating pore.

The invention provides a polyimide lithium battery diaphragm and a preparation method thereof, and relates to the technical field of lithium battery diaphragms.The diaphragm is provided with spherical or ellipsoidal holes formed by cracking of thermal expansion microspheres; the thermal expansion microspheres and a dispersing agent are dispersed in a polyamide acid solution, then the mixed slurry is prepared into a wet film, polyamic acid gelation and expansion kettle breaking of the thermal expansion microspheres are synchronously completed in cooperation with multi-stage heating heat treatment, the average pore size and porosity of pores of the diaphragm meeting the requirements can be obtained, and the process is simple and easy to implement. The method is suitable for large-scale production and preparation; the average pore size and the porosity of the pores of the diaphragm are highly controllable in process.

Provided is a method for producing a refined chemical liquid used in manufacturing a semiconductor element, the refined chemical liquid being produced by removing minute foreign matter through filtration using a porous membrane to refine a crude chemical liquid.　In the production of a refined chemical liquid used in manufacturing a semiconductor element, a crude chemical liquid is filtered by using, as a filter, a porous polyamide film which has a plurality of spherical holes therein and in which the plurality of spherical holes are connected to adjacent spherical holes to form communication holes.

Provided is a porous polyamide film in which the pore diameter and pore shape are controlled and which, when filtering a fluid, can satisfactorily remove impurities in the fluid. Also provided is a method for purifying a chemical liquid using the porous polyamide film.　The porous polyamide film has a plurality of spherical pores therein, and is configured such that: the plurality of spherical pores form connected pores with spherical pores that are adjacent thereto; the spherical pores have an average pore diameter of 10 nm to 200 nm; a pore diameter distribution indicates that the difference between the maximum value and the minimum value of pores is 1 nm to 15 nm; and the surface area of a region having an area of 1 m2 on a main surface of the porous polyamide film is 1000 m2 to 6000 m2.

The invention provides a composite porous ceramic which comprises spherical particles and neck connectors, and the spherical particles form a network structure through the neck connectors. Holes of the network structure are sphere-like holes, and a zigzag communicated pore channel structure is formed through the sphere-like holes; wherein the content of alumina in the neck connection is higher than the content of alumina in the spherical particles. The composite porous ceramic prepared by the invention has relatively high bending strength and corrosion resistance.

Provided are: a porous polyamide film in which pore diameter and pore shape are controlled and which is capable of satisfactorily removing impurities in a fluid while the fluid is being filtered; and a method for purifying a chemical solution by using the porous polyamide film.　In the porous polyamide film having a plurality of spherical pores therein, the plurality of spherical pores are configured to form connection pores connected with the adjacent spherical pores, the porosity of the porous polyamide film is 50-70%, and the flatness of the spherical pores is 0-0.2.

The invention relates to the technical field of ceramics, and particularly discloses fiber-reinforced reticular structure porous zirconium oxide and a forming preparation method thereof. The forming preparation method comprises the following steps: treating zirconium oxide fibers with a silane coupling agent ethanol solution to obtain pretreated zirconium oxide fibers; mixing the pretreated zirconium oxide fiber, zirconium oxide powder, water, an organic monomer, a cross-linking agent and a spherical pore-forming agent, and performing vacuum defoaming to obtain slurry; injecting the slurry into a mold, and adding an initiator aqueous solution to obtain a gel blank; carrying out directional cooling, heat preservation treatment and freeze drying on the gel green body to obtain a dried green body; and sintering the dried green body to obtain the fiber-reinforced porous zirconium oxide with the net structure. The fiber-reinforced reticular structure porous zirconium oxide obtained by the forming preparation method has the characteristics of high porosity, good compressive strength and good fracture toughness, has good comprehensive performance, and meets market requirements.