70 results about "Large pore" patented technology

The present invention relates to a high-voltage anodization method and an aluminum substrate anodized thereby and, more specifically, to a high-voltage anodization method using a phosphoric acid solution as an electrolyte, which enables stable anodization while applying a high voltage without causing a burning phenomenon on the surface of the aluminum substrate, and an aluminum substrate anodized thereby. The high-voltage anodization method according to the present invention improves a voltage ramping process in anodizing using phosphoric acid so that a high voltage of 190 V or higher can be applied while preventing surface burning of the aluminum substrate, thereby enabling stable anodization of the aluminum substrate. In addition, an anodized membrane manufactured using the aluminum substrate produced by the high-voltage anodization method of the present invention can stably form a hexagonal nanostructure having large pores of 150 nm or greater.

This invention discloses a thermal shock-induced catalytic electrode, its preparation method, and its application in wastewater treatment, belonging to the field of wastewater treatment technology. The catalytic electrode comprises a titanium metal substrate and a mixed metal oxide catalytic layer formed on the surface of the titanium metal substrate. The mixed metal oxide catalytic layer has a hydroxylation-rich surface, high specific surface area, and large pore volume, and its microstructure is a uniform mud-crack-like porous structure containing nanoscale grains. The preparation method includes first laser shock strengthening of the titanium metal substrate to form a mesoscale array structure; then loading the mixed metal oxide precursor using an immersion-pulling-space flow method; subsequently performing annealing; rapidly immersing the annealed electrode in a hydrogen peroxide solution for thermal shock quenching; and finally performing low-temperature tempering to eliminate internal stress and reduce resistance. The catalytic electrode of this invention achieves a balance between catalytic activity, conductivity, and stability, and its preparation process is simple and easy for large-scale industrial production.

This utility model relates to the field of gas purification technology for C4 equipment, specifically, to a gas purification and filtration device for C4 equipment. The device includes a body of the C4 equipment with a slot on its back. A filter chamber is located within the inner cavity of the slot. A rear cover is snap-fitted to the top of the slot. The integrated design of the slot and filter chamber saves internal space in the C4 equipment and is suitable for compact environments. The device also includes a pull-out plate located within the filter chamber. A pretreatment screen is fixedly connected to the center of the pull-out plate. The pretreatment screen has large pores to intercept large particles in the gas, preventing clogging of the filtration equipment. The pull-out plate can be pulled, enabling multi-stage filtration and coordinated purification. The pretreatment screen intercepts large particles such as hair and debris, preventing clogging of the main filter element. The first and second filter screens achieve medium and high precision filtration respectively, improving gas filtration efficiency. The three-stage gradient filtration extends the filter element's lifespan.

The application discloses a high-strength, large-pore-volume phosphorus-containing binder, characterized in that the binder comprises a glue, a curing agent and a modifier; the glue comprises a phosphorus-containing compound and an aluminum-containing compound; the curing agent comprises a gamma-aluminum oxide precursor, an acid and an alkylammonium salt, and the modifier is a metal chelate; wherein the colloidal solubility index of the gamma-aluminum oxide precursor is less than or equal to 50%; and the modifier is reacted with the glue in a high-shear dispersion emulsifier. The phosphorus-containing binder provided by the application, in combination with a conventional method, can obtain a catalytic cracking catalyst which, on the basis of high molecular sieve content and large pore volume, still has high wear resistance.

Provided are zeolite which, even in a severe thermal environment, maintains the hydrocarbon adsorbency and has increased catalytic reactivity and improved heat resistance, a production method thereof, a hydrocarbon adsorbent and an exhaust gas purifying catalyst. The zeolite is a zeolite having large pores with 12-member rings in a framework structure and encapsulating metal-containing particles. The metal contained in the metal-containing particles preferably contains at least one of metals selected from the group consisting of Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Sn, Zr, Rh, Ru, Pd, Pt, Ag, Ir, Au, Nb and Mo.

This invention discloses a mesoporous carbon composite material and its preparation method. The preparation method is as follows: S1: Using tetraethyl orthosilicate as the silicon source, an ethanol / deionized water mixture, a surfactant as the solvent system, and a conductive agent as the dopant, a polycondensation reaction is carried out under acid-base catalysis. A silica / soft template composite is formed through a sol-gel process, followed by high-temperature sintering to obtain a silica composite template; S2: A mixed solution A is prepared by mixing a phenol source, a dispersant, and water; a mixed solution B is prepared by mixing an aldehyde source, a lithium supplement, and a catalyst; S3: Mixed solutions A, B, and the silica composite template are reacted, carbonized, and activated. The resulting material is then added to a hydrofluoric acid solution to dissolve the template, and the resulting material undergoes thermal reduction to obtain the mesoporous carbon composite material. The mesoporous carbon prepared using the template method exhibits advantages such as high uniformity, large pore volume, and low powder resistivity. It can be applied to silicon-carbon composite materials to increase the deposition amount of nano-silicon, improve specific capacity, and reduce the expansion of silicon-carbon materials.

This invention relates to the field of high-purity aluminum and aluminum alloy production technology, and particularly to a porous alumina ceramic material, its preparation method, and its application. The material comprises a composite aggregate and an organic binder, wherein the mass ratio of the composite aggregate to the organic binder is 47:3. The composite aggregate comprises 9 wt%–17 wt% inorganic binder and 83 wt%–91 wt% aggregate particles. The inorganic binder comprises: 40 wt%–50 wt% B₂O₃, 20 wt%–29 wt% Al₂O₃, 10 wt%–15 wt% SiO₂, 9.4 wt%–14.4 wt% MgO, 0–0.5 wt% Na₂O, 0–0.5 wt% K₂O, and 0–10 wt% Re₂O₃, where Re is a rare earth element. This method uses corundum or α-Al₂O₃ as a framework and rare earth composite oxides as an inorganic binder. A high-temperature reaction forms sintering necks between the aggregate particles, resulting in a porous alumina ceramic with a bimodal pore distribution. Two different pore sizes are distributed in situ on the surface of the skeleton particles and the sintered neck, achieving a dual-capture filtration effect for aluminum molten inclusions. This solves the problem that filters with large pore sizes cannot simultaneously filter small-grain-sized impurities.

The application relates to an ultra-low thermal conductivity external wall external insulation foam ceramic and a preparation method thereof, and belongs to the technical field of thermal insulation materials. The preparation method of the ultra-low thermal conductivity external wall external insulation foam ceramic comprises the following steps: (1) mixing boron carbide, iron oxide, fluorite, albite and potassium feldspar to obtain a mixture; (2) ball milling the mixture into mixed powder I; (3) uniformly stirring the mixed powder I and aluminum nitride powder to prepare a foaming agent; (4) ball milling solid waste raw materials into solid waste powder; (5) mixing the foaming agent, the solid waste powder and water, and uniformly stirring to prepare mixed powder II; (6) pressing the mixed powder II into a green body; and (7) sintering the green body to obtain the foam ceramic. The prepared foam ceramic has the structural feature that small pores surround large pores, and can simultaneously meet the indexes of density, strength and thermal conductivity, and meets the requirements of the national standard of "external wall external insulation foam ceramic", and can be used for external wall external insulation.

The present invention provides a method for manufacturing electrode plates for secondary batteries that can fully obtain the effects of dielectric materials, and also provides electrode plates. [Solution] In the first step of the electrode plate manufacturing method, based on the measurement results of the pore distribution in the electrode plate composite, volume peaks of different sizes of pores are determined, and the size range of the first dielectric 23 with large particle size is set from the size of the large pores in which the volume peak appears, and the size range of the second dielectric 24 with small pore size is set from the size of the small pores in which the volume peak appears. In the second step of the electrode plate manufacturing method, based on the evaluation results of a secondary battery having an electrode plate 8 containing the first dielectric 23 and the second dielectric 24 whose size ranges were set in the first step, the mixing ratio of the first dielectric 23 and the second dielectric 24, and the ratio of the dielectric 22 to the total weight of the electrode plate composite are set.

The invention provides a template agent and a preparation method thereof, and a macroporous ZSM-5 molecular sieve and a synthesis method thereof. The preparation method of the template agent comprises the following steps: mixing maleic anhydride, an initiator and a first organic solvent to obtain a reaction solution A, and then introducing alpha-olefin to carry out copolymerization reaction with the reaction solution A to obtain a liquid-solid mixture B; carrying out liquid-solid separation on the liquid-solid mixture B, washing an obtained solid C with a second organic solvent, and drying to obtain a product D; and carrying out ammoniation treatment on the product D to obtain the template agent E. The template agent containing the monoolefine-maleic anhydride polymer is introduced into the ZSM-5 molecular sieve through a secondary synthesis method, inorganic acid or organic acid does not need to be added in the synthesis process, the molecular sieve is easier to form, the ratio of macropores in the ZSM-5 molecular sieve is increased, and the ZSM-5 molecular sieve has high crystallinity.

The present invention relates to the technical field of fine chemical synthesis. Disclosed are a preparation method for a supported nickel-based catalyst and polyetheramine prepared from the catalyst. The preparation method comprises the following steps: S1, using a first active metal source, aluminum hydroxide dry rubber powder, an extrusion aid, a pore-enlarging agent, and a silica sol as raw materials, and preparing, by means of kneading molding, an aluminum oxide carrier containing an active metal component; and S2, using a second active metal source to prepare an impregnation solution, then impregnating the aluminum oxide carrier prepared in step S1, and calcining same to prepare the supported nickel-based catalyst, wherein the first active metal source and the second active metal source each include a nickel source, a platinum source, a copper source, and a cobalt source. The supported nickel-based catalyst prepared in the present invention has the characteristics of large pore volume, large specific surface area, and uniform distribution of active components. Polyetheramine is prepared from the supported nickel-based catalyst, so that the conversion rate of a polyalcohol ether and the selectivity of a primary amine can be significantly improved, thereby reducing the production of by-products.

This invention belongs to the field of petrochemical technology, specifically relating to a high-purity pseudoboehmite with concentrated pore size and its preparation method. The preparation method includes: mixing aluminum sulfate solution with ammonia water for a primary neutralization reaction; adding ammonia water and a pore-expanding agent to the resulting slurry for a secondary neutralization reaction; subsequently heating and allowing it to age; filtering, washing, drying, and pulverizing the aged product to obtain high-purity pseudoboehmite. The preparation method of this invention employs co-current and overflow neutralization, reducing the process flow and simplifying operation. It solves the problems of high synthesis cost, complex operation, and environmental pollution in existing pseudoboehmite synthesis methods. The generated byproduct, ammonium sulfate, has certain industrial application value. The pseudoboehmite obtained by this invention has the advantages of large specific surface area, large pore volume, and uniform and concentrated pore size distribution.

The utility model discloses a kind of sintered porous metal membrane sintered precursor and sintered porous metal membrane, solve both can avoid forming large pore defect, can reduce manufacturing cost, improve the technical problem of sintered porous metal membrane filtration performance simultaneously.The sintered porous metal membrane sintered precursor includes: base material, the base material is the metal wire mesh with mesh number 80-150 mesh;Organic macromolecule coating layer, the organic macromolecule coating layer is coated on the first side of the metal wire mesh, and the aperture of the metal wire mesh is filled;And metal powder coating layer, the metal powder coating layer is coated on the second side of the metal wire mesh.The sintered porous metal membrane includes: base material, the base material is the metal wire mesh with mesh number 80-150 mesh;And sintered metal film layer, the sintered metal film layer is only connected on the side of the metal wire mesh, so that the grid structure of the other side of the metal wire mesh protrudes from the sintered metal film layer.

This utility model discloses a precision mold with a built-in venting insert, including an upper mold base, a lower mold base, a cavity located at the bottom of the upper mold base, and a core located at the top of the lower mold base. A split venting insert is embedded in the melt end region of the core. The venting insert is composed of at least two layers of permeable steel stacked and fixed along the thickness direction. The pore diameter of the upper layer of permeable steel is smaller than that of the lower layer. The venting insert has an internal venting channel penetrating through the multiple layers of permeable steel, with one end extending to the molding surface of the venting insert and the other end connected to a venting interface on the mold sidewall. The multi-layer permeable steel design, combined with a spiral guide groove, uses small pores in the upper layer to prevent melt overflow and large pores in the lower layer to accelerate venting. Combined with the spiral guide for efficient venting, this significantly reduces defects such as bubbles and depressions in the plastic part, and significantly improves molding quality.

The present invention provides a multilayer ceramic dielectric for an inductor and an inductor using same, wherein a first anodic oxide film having a low porosity due to having relatively small pores or a relatively small number of pores is positioned on upper and lower surface layers, and a second anodic oxide film having a large porosity due to having relatively large pores or a relatively large number of pores is positioned on inner layers positioned between the upper and lower surface layers to make the dielectric constant high on the upper and lower surfaces and low in an inner region so that a current path operates efficiently on the surface sides, and the efficiency of magnetic field passage inside can be enhanced to improve high-frequency characteristics.

The application provides a positive electrode material, a preparation method thereof and a battery. The positive electrode material comprises a core and a first carbon layer coated on at least part of the surface of the core. The core comprises secondary particles, and the secondary particles comprise a plurality of primary particles bonded by Na-NASCION type fast ion conductors containing an E element. The binding energy of the E element and oxygen is 520 eV-820 eV. The primary particles comprise NFPP particles and a second carbon layer coated on at least part of the surface of the NFPP particles. The core has a pore structure, and the pore structure comprises large pores with a pore size of 0.5-1.5 mu m. The cross-sectional porosity of the core is 40%-60%. The positive electrode material improves the electron transmission efficiency of the NFPP active particles, optimizes the embedding and de-embedding capacity of sodium ions, increases the contact area between the electrolyte and the material, and finally effectively improves the rate performance of the positive electrode material.

The present application relates to the technical field of alumina carrier, in particular to a preparation method of super-large pore hydrogen spheroidal alumina carrier.The preparation method of super-large pore hydrogen spheroidal alumina carrier comprises the following steps: a) mixing nanocellulose and amino silane coupling agent in water to prepare slurry;b) mixing pseudo-boehmite, inorganic strong acid and water, kneading for 20-40 min to obtain initial sol; then stirring the slurry prepared from the initial sol and the solution of basic aluminum chloride for 40-50 min to obtain slurry; forming the slurry to obtain wet gel balls;c) mixing the wet gel balls obtained in step b) with urea solution, and hydrothermal reaction at 110-130 DEG C for 5-7 h; washing with water; drying; and then sintering in an oxygen-containing atmosphere, thus obtaining the super-large pore hydrogen spheroidal alumina carrier.The preparation method of the present application generates a microcrystalline hardening layer of mullite in situ at the interface of the carrier pore wall, thereby maintaining high porosity while improving mechanical strength.

The utility model discloses a kind of woven filter belt and high-pressure belt type dehydrator, it is related to dehydration equipment technical field.The woven filter belt of the utility model, including first monofilament, first monofilament is set along warp direction, two adjacent first monofilament weaving and form framework structure, framework structure has framework hole;Woven filter belt also includes second monofilament and multifilament, second monofilament and multifilament are set along weft direction, second monofilament and multifilament are located in framework hole, second monofilament and multifilament are spaced apart arrangement.The woven filter belt of the utility model, between second monofilament and multifilament, between first monofilament and second monofilament and multifilament can form slightly larger pore, and a large number of free water can be quickly discharged through the pore, improve processing efficiency;And micropore can be formed in multifilament, the micropore can realize the interception of solid particle, reduce the solid particle of entering filtrate by filter belt, to reduce the processing load and cost of filtrate.

A MXene membrane with gradient pores, its preparation method and application are provided. The MXene membrane with gradient pores, excluding the substrate, includes the following layers in sequence from bottom to top: an ultra large pore MXene membrane layer with a thickness of 0-30 nanometers (nm) and a pore size of 2-5 nm; a large pore MXene membrane layer with a thickness of 0-30 nm and a pore size of 0.9-1.2 nm; a medium pore MXene membrane layer with a thickness of 20-50 nm and a pore size of 0.6-0.8 nm; and a small pore MXene membrane layer with a thickness of 40-60 nm and a pore size of 0.3-0.5 nm. The present disclosure prepares the MXene membrane with gradient pores by repeating spin-coating and plasma irradiation while limiting the irradiation time.

This invention discloses a cyclononenyl bicovalent macroporous covalent organic framework and its preparation method. The framework contains both C-C and B-O covalent bonds, exhibiting a ring-shaped macroporous structure. The preparation method involves mixing 10,15-dihydro-5H-tribenzo[a,d,g][9]cyclononen-2,3,7,8,12,13-hexanol with a diboronic acid monomer at a molar ratio of 3:2, dissolving the mixture in a mixed solvent of mesitylene and dioxane, reacting at 90°C under nitrogen protection, and obtaining the target product after filtration, washing, and drying. The diboronic acid monomer is 1,4-phenylenediboric acid or 4,4''-biphenylenediboric acid. This material has the characteristics of good thermal stability, ideal specific surface area and pore size greater than 2nm. It exhibits excellent adsorption capacity and selectivity for CO2, low-carbon alkanes, acetylene and other substances. It can be used in the separation of low-carbon alkanes, adsorption of dye macromolecules, photoelectrocatalytic carriers and other fields. Moreover, no external transition metal catalyst is required in the synthesis process, which makes it low-cost and environmentally friendly.

The application discloses a preparation method of a pitch-based hard carbon negative material in the technical field of batteries, and comprises the following steps: step 1) taking pitch and carbon material, and transferring to a mixing device to obtain a mixture; step 2) pre-oxidation: transferring the mixture to an oxidation furnace, introducing air, gradient heating, completing oxidation, and obtaining pre-oxidized material; and step 3) carbonization treatment: transferring the pre-oxidized material to a carbonization furnace, and performing carbonization treatment to obtain a hard carbon negative material. The application has a large specific surface area and is rich in medium and large pores, can realize high dispersion and isolation of pitch, improves the oxidation efficiency of pitch, and especially solves the softening and melting problem of pitch with a medium and low softening point, thereby paving the way for commercialization of the pitch-based hard carbon.

The present application relates to the technical field of adsorbent, in particular to a porous material adsorbent and its preparation method and application. The preparation method comprises the following steps: (1) adding a ruthenium-containing substance and an organic peroxide into a first organic solvent to perform a first reaction, adding a crosslinking agent to perform a second reaction, and obtaining a precursor solution; (2) adding a second organic solvent into the precursor solution to mix, obtaining a ligand mixture; (3) adding graphene oxide into the ligand mixture to mix, obtaining an adsorbent slurry, performing solid-liquid separation, calcination and extrusion molding on the adsorbent slurry, and obtaining a porous material adsorbent. The prepared porous material adsorbent has a large specific surface area, a large pore size and a large pore volume, and has a high compressive strength. The porous material adsorbent is applied in the field of adsorption desulfurization, has a high total sulfur breakthrough sulfur capacity and a high tail gas outlet precision.

The application belongs to the field of battery materials, and discloses a pitch-based mesoporous carbon and a preparation method and application thereof. The pitch-based mesoporous carbon has multiple pores, the average pore diameter of the pores is 2-5 nm, and the ratio of the pore volume of the pores with a pore diameter of 0.5-5 nm to the pore volume of all the pores is greater than or equal to 90%. Compared with the porous carbon in the prior art which has a wide pore diameter distribution and a low proportion of micropores and mesopores, the pitch-based mesoporous carbon provided by the application has a narrower pore diameter distribution and a significantly higher enrichment degree of micropores and mesopores. The high-proportion, narrow-distribution micropore and mesopore structure can provide efficient and rapid transmission channels for lithium ions, improve the rate performance of the material, effectively buffer volume expansion, improve the structural stability, and avoid problems such as low utilization and easy collapse of the structure caused by excessively large pores, so that the material has excellent ion transmission efficiency, cycle stability and structural integrity when used as a negative electrode material.

This utility model discloses a medical odor-controlling air filter, relating to the field of air filter technology. The utility model includes a housing, with an intermittent air intake component on the top of the housing, and an air intake pipe fixedly connected to the top of the intermittent air intake component. This utility model features a multi-layered, high-efficiency filtration structure. The primary filter layer uses a non-woven fabric material with large pores, effectively filtering large particles of dust, hair, and other impurities from the air, providing initial purification and protecting subsequent filter layers. The activated carbon filter layer removes odors and some harmful gases from the air, improving the odor environment. The HEPA filter layer removes fine particulate matter from the air, ensuring air cleanliness. The photocatalytic coating uses an ultraviolet lamp for catalytic decomposition, further removing harmful gases from the air. Through the synergistic effect of multiple filtration methods, deep purification of the air in the medical room is achieved.

The application discloses a kind of composite short fibers for air filter, comprising: fiber matrix, the fiber matrix is made of first polymer;The surface of fiber matrix is equipped with multiple recessed grooves;Two recessed grooves between adjacent form protruding rib part;The top of protruding rib part is covered with low melting point layer, the low melting point layer is made of second polymer;The melting point of first polymer is higher than the melting point of second polymer by 40-100 DEG C.The application leaves larger pore and filter area for filter material, so that the filter material can obtain high porosity, and has low damping and resilience and rigidity.Meanwhile, the three-lobed main body in three-lobed cross section is mixed with antibacterial material, which gives the fiber long-term safe broad-spectrum antibacterial, antiviral, mildew-proof, odor-removing function.

This invention provides a high-thickness, multi-layered twill-woven spaced fabric with large pores, its twill weaving device, and weaving method. The device's opening mechanism is equipped with novel heddles containing multiple twill weave holes. These novel heddles include multi-layered lifting heddles capable of relative movement and multi-hole saddle heddles. During weaving, the device adjusts the movement path and the distance between the heddle eyes through the coordinated action of the lifting and saddle heddles, thereby adjusting the weave hole distance and ensuring successful weft insertion. This achieves integrated weaving of multi-layered twill-woven spaced fabrics. By increasing the number of layers in the middle layer of the fabric and using X-shaped warp threads to connect the layers, this invention meets the thickness requirements of the fabric, resulting in a high-thickness, multi-layered twill-woven fabric with a stable structure, uniform stress distribution, strong impact resistance, large pores, and minimal yarn slippage. The device of this invention has low modification costs, simple process, and high feasibility, enabling the industrial production of high-thickness, multi-layered twill-woven spaced fabrics and possessing significant commercial application value.

This utility model relates to the field of fuel cell technology, and in particular to a buffer device for a solid oxide fuel cell stack with overheat protection and combined heat and power functions. A biomimetic grapefruit peel structure protective shell is provided between the solid oxide fuel cell stack and several helical spring components. Several symmetrically arranged metal liquid cooling pipes are located on the biomimetic grapefruit peel structure protective shell along the fuel flow direction. A temperature sensor connected to the liquid cooling system is installed inside the biomimetic grapefruit peel structure protective shell to collect the internal temperature signal of the solid oxide fuel cell stack and control the start / stop and flow rate of the cooling water in the metal liquid cooling pipes. The outermost layer of the biomimetic grapefruit peel structure protective shell is resistant to mechanical vibration and has good thermal insulation, providing a good buffering effect while reducing heat loss from the stack. Smaller pores are provided in the middle layer, and larger pores are provided in the inner layer, improving the system's buffering efficiency through the porous structure. The metal liquid cooling pipes are located within the middle layer of the protective shell, achieving efficient heat conduction.

This invention relates to the field of dielectric ceramics technology, providing a glass-coated strontium titanate-based giant dielectric ceramic material and its preparation method. This invention utilizes a zinc borosilicate glass sol to coat strontium titanate-based ceramic powder, followed by pressing, aging, pulverizing, molding, debinding, and sintering to obtain the glass-coated strontium titanate-based giant dielectric ceramic material. This invention allows the glass sol to be uniformly distributed on the surface of the ceramic powder, forming a glass sol coating layer with a nanometer-thickness. After melting, the coating layer has almost no large pores, effectively improving the performance of the strontium titanate-based ceramic material. The glass-coated strontium titanate-based giant dielectric ceramic material prepared by this invention has a stable structure and good thermal stability, exhibiting a stable high dielectric constant and low dielectric loss over a wide temperature range, and can be widely used in the field of energy storage electronic materials.