48 results about "Porous oxide" patented technology

The invention relates to the technical field of brass materials, in particular to a high-strength and high-toughness brass material and a preparation method thereof.The preparation method comprises the steps that a porous oxide film layer is prefabricated on the surface of brass through plasma electrolytic oxidation, and an oxide film layer doped with double-bond silver-loaded graphene oxide is constructed on the surface of the brass; the preparation method comprises the following steps: firstly, preparing modified MXene, then preparing a photocurable hole sealing coating for hole sealing treatment, introducing double-bond silver-loaded graphene oxide and the modified MXene as fillers into the photocurable hole sealing coating, firstly performing sulfhydrylation on the MXene by using 3-mercaptopropyltriethoxysilane, and then grafting a double-bond-containing bis-benzimidazole ring derivative through light click to obtain the modified MXene; vinyl-terminated polyurethane is used as a cross-linking agent, o-phenyl phenoxyethyl acrylate, butyl acrylate, glycidyl methacrylate and octadecyl acrylate are compounded to serve as an acrylic monomer, a diluent and a solvent are introduced, a complex cross-linked network is constructed, and the service life of the brass material is prolonged.

A method for preparing a two-dimensional porous oxide belongs to the technical field of porous oxide preparation. The method includes the following steps: (1) using a metal salt as a precursor, an ion-intercalated two-dimensional oxide is prepared by a molten salt method; (2) the ion-intercalated two-dimensional oxide is mixed with a lithium initiator, reacted for a predetermined time, and then the unreacted lithium initiator is removed, filtered, and washed to obtain the two-dimensional porous oxide. The two-dimensional porous oxide prepared by this method forms uniform pores with a pore size range of 2-10 nm and a specific surface area of ​​200-300 m². 2 / g.

The present disclosure relates to a porous catalyst including an oxide matrix structure having mesopores and micropores, and metal nanoparticles embedded in the oxide matrix structure, wherein the metal nanoparticles of the porous catalyst have residual compressive stress.

The present invention relates to a pump, in particular a vacuum pump, comprising a pump-active component having a coating, wherein the coating comprises an oxide layer, which is in particular formed by anodic oxidation in an acidic electrolyte and which has pores, and a fluorine-free polymer-based and / or sol-gel-based sealing, and wherein the pores of the oxide layer are at least partly covered by the sealing and / or impregnated with the sealing and / or filled with the sealing. The present invention further relates to a method of sealing a porous oxide layer.

This application relates to the field of aircraft structural design technology, and more particularly to a folding tail boom structure for a single-rotor helicopter with a tail rotor, including a fuselage, a tail boom, and a folding assembly disposed at the connection between the fuselage and the tail boom. The folding assembly includes a front folding frame and a rear folding frame, with the front folding frame fixedly connected to the tail of the fuselage and the rear folding frame fixedly connected to the front end of the tail boom. The front and rear folding frames are rotatably connected by at least one set of shoulder screws, forming a folding rotating pair. This invention provides a porous oxide film layer formed by phosphoric acid anodizing at the connection interface between the front and rear folding frames and the fuselage / tail boom, combined with structural adhesive bonding, riveting mechanical fixation, and end face screw locking, forming an interconnected four-fold fixing structure. At the same time, the porous oxide film layer significantly improves the roughness and chemical activity of the bonding interface, greatly enhancing the bonding strength and effectively solving the problem of loosening of traditional quick-release pin connections under heavy loads.

This invention relates to the field of brass material technology, specifically a high-strength, high-toughness brass material and its preparation method. A porous oxide film is pre-formed on the brass surface through plasma electrolytic oxidation. A double-bonded silver-loaded graphene oxide-doped oxide film is then constructed on the brass surface. A photocurable sealing coating is then prepared for sealing. In the photocurable sealing coating, double-bonded silver-loaded graphene oxide and modified MXene are introduced as fillers. MXene is first thiolated with 3-mercaptopropyltriethoxysilane, and then grafted with a double-bonded dibenzimidazole ring derivative via photo-clicking to obtain modified MXene. A vinyl-terminated polyurethane is used as a crosslinking agent, and a complex crosslinking network is constructed using a blend of o-phenylphenoxyethyl acrylate, butyl acrylate, glycidyl methacrylate, and octadecyl acrylate as acrylic monomers. A diluent and solvent are introduced to extend the service life of the brass material.

The application discloses a preparation method of intermetallic compound modified lithium ion battery negative electrode material. (96‑x) Ni4Fe x The method comprises the following steps: in the first step, Al, Ni and Fe ingots are melted into Al Ni4Fe x intermediate alloy ingots by using a vacuum arc melting furnace at 1650-1800 DEG C, and then a precursor strip is obtained by melt spraying; in the second step, the precursor strip is ball milled to obtain a precursor powder with a particle size of 1-3 microns; and in the third step, the precursor powder is immersed in a NaOH solution for 6-8 hours to obtain a Ni3Fe / Ni / NiO lithium ion battery negative electrode material. Compared with the previous material, the nano-porous oxide prepared by the application has higher porosity and larger specific surface area, and can more effectively alleviate the problem of the deterioration of electrochemical performance caused by the volume change of the active material in the charging and discharging process.

The invention discloses a hydrophilic photocatalyst of a liquid CO2 and water double-liquid-phase catalytic system as well as a preparation method and application of the hydrophilic photocatalyst. The hydrophilic photocatalyst is prepared from a porous oxide carrier, a semiconductor matrix and a metal additive, the porous oxide carrier is selected from one of a hydrophilic molecular sieve, a SiO2 nanotube and mesoporous Al2O3 and accounts for 0-90% of the total mass of the catalyst; the semiconductor substrate is selected from at least one of ZnO, CeO2, C3N4 and TiO2 and accounts for 10%-100% of the total mass of the catalyst; the metal additive is selected from at least one of Au, Pt, Pd, Ru, Ag, Cu and Fe, is loaded in the form of monatomic and / or nano-particles, and accounts for 0.1-5% of the total mass of the catalyst. Compared with a traditional water phase system, the hydrophilic photocatalyst is improved by more than 300%, the total selectivity of a product reaches 90% or above, the stability of the catalyst is remarkably enhanced, the catalyst can be used in selective oxidation reaction of ethane, methanol or ethanol, the dual functions of taking CO2 as a reactant and a solvent are achieved, and the economical efficiency and the environmental protection property are improved.

This invention provides a method for efficiently producing aliphatic aldehydes by oxidizing aliphatic primary alcohols having four or more carbon atoms. [Solution] A method for producing an aliphatic aldehyde, comprising the step of oxidizing an aliphatic primary alcohol having 4 or more carbon atoms with molecular oxygen in the presence of a ruthenium-supported catalyst, The ruthenium-supported catalyst comprises ruthenium supported on a carrier, The aforementioned support is a porous oxide, The surface area per unit mass of ruthenium is 60 m². 2 / g or more The mesopore volume of the ruthenium-supported catalyst is 0.15 mL / g or more. A method for producing aliphatic aldehydes.

The invention discloses an aluminum alloy conductor and a cable produced by using the method. The method comprises the following steps of: performing polishing and grinding and inert atmosphere protection pretreatment on the aluminum alloy conductor; performing two-step anodic oxidation to form a gradient ceramic layer; applying a fluorosilane self-assembled molecular film; sequentially constructing a composite barrier consisting of an epoxy bonding layer, a polyimide isolating membrane and a fluorine-containing acrylate functional layer; and finally, an adaptive inner screen material extruding and cooling process is carried out. The gradient ceramic layer is formed through two-step anodic oxidation, in the first step, a porous oxide layer is formed in phosphoric acid electrolyte, and in the second step, a compact closed oxide layer is formed in sulfuric acid electrolyte. According to the aluminum alloy conductor composite protection method, the anti-adhesion effect is lasting, the electrical performance is reliable, the process compatibility is high, the aluminum alloy conductor is not adhered to the extruded inner screen material, and the service life of the cable is long.

The invention discloses a lithium ion battery diaphragm, a preparation method and a battery thereof, the lithium ion battery diaphragm comprises a base membrane and a composite ceramic coating coated on the surface of the base membrane, the composite ceramic coating comprises a ceramic material and a porous oxide, the mass ratio of the ceramic material to the porous oxide is 1: 2-1: 4, the ceramic material comprises at least one of LLTO, LLZO and LAGP, and the porous oxide is a porous oxide. The porous oxide comprises at least one of Al2O3, ZrO2 and AlOOH, and the preparation method comprises the following steps: S1, mixing the ceramic material and the porous oxide according to a mass ratio to obtain first powder; s2, preparing bottom layer slurry; s3, preparing surface layer slurry; and S4, the two faces of the base membrane are sequentially coated with the bottom layer slurry and the surface layer slurry, drying is conducted after coating is completed, the lithium ion battery diaphragm is obtained, a lithium battery comprises a positive plate, a negative plate, the lithium ion battery diaphragm, a current collector and an electrolyte, and the cycle life of the battery is prolonged.

The invention discloses a silicon-carbon negative electrode composite material and a preparation method and application thereof, and relates to the technical field of negative electrode materials, the silicon-carbon negative electrode composite material comprises a conductive carbon material, deposited silicon and a porous oxide solid electrolyte with a porous structure; wherein part of the conductive carbon material is distributed in a porous structure of the porous oxide solid electrolyte, and the rest of the conductive carbon material is distributed on the surface and / or in the silicon-carbon negative electrode composite material; the preparation method comprises the following steps: uniformly mixing the oxide solid electrolyte, the sintering aid and the pore-forming agent in a solvent in a ball milling manner to obtain mixed slurry; carrying out freeze drying on the mixed slurry, carrying out heat treatment in an inert atmosphere, then adding the mixed slurry into a fluidized bed reactor, and introducing silicon source gas to carry out primary chemical vapor deposition to form deposited silicon; carbon source gas is introduced for secondary chemical vapor deposition, and a conductive carbon material is formed; the silicon-carbon negative electrode composite material with excellent electrochemical performance is obtained.

This invention provides a method for preparing a syngas-to-higher alcohols catalyst with a hierarchical pore structure. The preparation method includes: loading an aqueous precursor of the active component ruthenium onto a porous oxide support, and drying it to obtain a catalyst powder precursor; mixing the catalyst powder precursor with a binder, an extrusion aid, PMMA microsphere powder, and water, and mechanically kneading it to form a plastic slurry; extruding the plastic slurry into a wet catalyst preform; drying the wet catalyst preform and calcining it to obtain a shaped Ru-based catalyst with a two-level pore structure of macropores and mesopores. The catalyst prepared by this method achieves a total alcohol selectivity of over 40% in the one-step synthesis of higher alcohols from syngas, and C... 6+ The selectivity of higher alcohols in the total alcohol products reaches over 60%, while maintaining a high CO conversion rate.

This invention provides a porous oxide composite material, a silicon-carbon composite material, a preparation method, an application, and a battery. The preparation method includes the following steps: (1) heating a mixture containing pulverized molecular sieve, phenol source, formaldehyde, and catalyst to obtain molecular sieve-phenolic resin composite spheres; (2) deforming the molecular sieve-phenolic resin composite spheres under external force to obtain a non-spherical molecular sieve-phenolic resin composite material; (3) heating and curing the spherical molecular sieve-phenolic resin composite material under an inert atmosphere, followed by carbonization to obtain the porous oxide composite material. The porous oxide composite material prepared by this invention can effectively increase the contact area between particles while maintaining a high compaction density, thereby improving the material's electrical conductivity, rate performance, and cycle performance.

The present disclosure contemplates an optical device that comprises a low refractive index layer that comprises a porous oxide material. The optical device may further comprise at least one additional layer comprising a second material. The optical device may comprise an ultra-low refractive index layer that comprises a porous dielectric material. Such a device may have strong angle-dependent spectral responses, including structural color devices that may produce highly iridescent and angle variable color output. In other aspects, a device is provided that comprises a first layer or region comprising a porous material comprising silicon dioxide (SiO2), which may be an aerogel or formed via glancing angle deposition (GLAD). The device may also comprise at least one additional layer or region comprising a dielectric material or a metal.

The invention relates to the technical field of electrophoretic coatings, in particular to an anticorrosive coating as well as a preparation method and application thereof. The anticorrosive coating comprises: a porous oxide layer; the porous oxide layer is obtained by performing surface oxidation treatment on the surface of the metal base material by using an anodic oxidation liquid medicine; or the porous oxide layer is formed on the surface of the metal base material through electrolysis of the metal base material; the closed body is formed on the surface of the porous oxide layer; the closed body is obtained by performing surface closing treatment on the porous oxide layer by using a closing liquid; the confining liquid comprises a second acid solution, a second additive, an organic solvent and water; and the electrophoretic coating is formed on the closed body. The anti-corrosion coating has excellent adhesive force on a metal base material, and the adhesive force after aging is also excellent; in addition, the anticorrosive coating has excellent corrosion resistance, and especially has excellent electrolyte corrosion resistance, damp-heat aging corrosion resistance and copper ion accelerated salt spray resistance.

This invention relates to a method for preparing ion-doped yttrium iron garnet powder, belonging to the field of materials preparation. The method specifies a method for preparing ion-doped yttrium iron garnet powder, wherein the chemical composition of the ion-doped yttrium iron garnet powder is Ce. a Bi b Y (3‑a‑b) Fe5O 12 Where a≤0.4, b≤0.4, and a and b are not both 0, the method includes the following process steps: first, synthesizing a polymeric network gel containing Ce, Bi, Y, and Fe ions; then calcining the obtained polymeric network gel to obtain a loose and porous oxide precursor powder; placing the obtained oxide precursor powder in a high-temperature horizontal ball mill for high-temperature controlled-pressure ball milling, and finally obtaining ion-doped yttrium iron garnet powder. The method of the present invention can obtain composite oxide powder with high phase purity, low defect density, and good compactness and grain uniformity.

The invention belongs to the technical field of solid electrolyte preparation, and discloses a hydrophobic composite solid electrolyte and a preparation method thereof. The preparation method comprises the following steps: mixing a template agent, a complexing agent and reactants required for preparing the oxide solid electrolyte, preparing a porous oxide solid electrolyte precursor through a hydrothermal synthesis method, and calcining to obtain the porous oxide solid electrolyte; mechanically mixing the porous oxide solid electrolyte with Li2S, P2S5 and an organic solvent to obtain a mixed material, and calcining the mixed material to obtain an oxide sulfide composite solid electrolyte; the surface of the oxide sulfide composite solid electrolyte is coated with a layer of hydrophobic liquid substance through spraying, and the hydrophobic composite solid electrolyte is obtained through curing treatment. The composite solid electrolyte has high conductivity and hydrophobicity, and has good interface compatibility with an electrode material.

The invention provides a method for modifying a high-nickel ternary positive electrode material. The method comprises the following steps: preparing sol containing a metal oxide precursor; the preparation method comprises the following steps: dispersing a high-nickel ternary positive electrode material in an alcohol solvent, and uniformly stirring to obtain slurry; under a stirring condition, adding the obtained sol into the obtained slurry, and continuously stirring to uniformly coat the surface of the positive electrode material with the sol to obtain a mixture; putting the prepared mixture into a low-temperature environment, and solidifying the mixture into a pre-frozen sample in a pre-freezing manner; performing vacuum drying on the pre-frozen sample in a freeze dryer to sublimate the solvent to form a porous structure; and sintering the sample subjected to vacuum drying in an oxygen atmosphere to obtain the porous oxide coating layer modified high-nickel ternary positive electrode material. According to the invention, the positive electrode material is soaked in the modified sol, the coating layer is cured by pre-freezing, the solid-phase solvent is sublimated by freeze-drying, and a porous structure is constructed in situ in the coating layer, so that the cycling stability and the rate capability of the material are synchronously improved.

The present invention relates to a process for decontaminating a spent catalyst comprising a metal from Group VIB and / or a metal from Group VIII, and a porous oxide-based support, and containing coke and metallic contaminants including at least nickel and vanadium. The process comprises: - a step for extracting at least a portion of the metallic contaminants from the spent catalyst by contacting the spent catalyst with an extraction solution comprising sulfuric acid and at least one alcohol, to obtain a spent catalyst depleted in vanadium and nickel contaminants, recyclable in a hydroconversion or hydrotreating process for hydrocarbon feedstocks, and a liquid extract containing at least vanadium and nickel. The invention also relates to a process for hydroconverting a hydrocarbon feedstock containing metals, incorporating the recycling of a catalyst obtained by decontamination according to the described decontamination process.

The application provides a composite solid electrolyte membrane and a preparation method thereof, a secondary battery and an electric device. The preparation method comprises the following steps: forming a first mixed solution of a precursor solution of an oxide solid electrolyte and a pore-forming agent, and forming a porous oxide solid electrolyte membrane by using a flow casting method; dissolving a lithium salt and a tackifier in an organic solvent to obtain an ionic liquid; and infiltrating the ionic liquid into the porous oxide solid electrolyte membrane by applying pressure to obtain the composite solid electrolyte membrane. The application provides a method for efficiently and uniformly filling the porous oxide solid electrolyte membrane. The composite solid electrolyte membrane has high ion conductivity and interface contact, realizes rapid infiltration of the ionic liquid and efficient utilization of the porous oxide solid electrolyte membrane, and has high ion conductivity and interface contact. The application also provides application of the composite solid electrolyte membrane in the secondary battery, and the secondary battery has high energy density and cycle life performance.

The present invention relates to porous oxide materials containing niobium in oxidation state + 5 and / or heavy homolog tantalum, and their use. The subject of the invention is also an iridium-containing (electro) catalyst comprising a porous oxide material of a Group 5 element, in particular a porous niobium (V) and / or tantalum (V) oxide-containing material. Furthermore, the invention relates to the use of such an (electro) catalyst.

The invention belongs to the technical field of preparation of perfluorobutyl ethylene, and provides a nanoscale high-dispersity rhenium-based catalyst for preparing perfluorobutyl ethylene as well as a preparation method and application of the nanoscale high-dispersity rhenium-based catalyst. The preparation method comprises the following steps: roasting a porous oxide to obtain a carrier; mixing a rhenium source, water and a pH value regulator to obtain a precursor solution; immersing the carrier into a precursor solution for electrostatic adsorption to obtain a supported rhenium precursor, and calcining to obtain the nanoscale high-dispersity rhenium-based catalyst, the loading amount of rhenium in the rhenium-based catalyst is 0.1-1 wt%; and the particle size is 0.1-10 nm. The catalyst prepared by the method can efficiently activate molecular bonding sites of perfluorobutyl iodide and ethylene under mild conditions, the highly dispersed active center of the catalyst can avoid agglomeration and inactivation, and the catalyst has the advantages of easy separation and recyclability, reduces energy consumption of separation and purification and discharge of three wastes, can effectively inhibit side reactions, and is suitable for industrial production. The method is suitable for continuous industrial production of perfluorobutyl ethylene.

The utility model discloses a multilayer heat -proof sheet metal structure of N2 gas heater, including assembly sheet metal part, the first assembly frame and the second assembly frame are provided with respectively on the assembly sheet metal part top and below, the both ends of assembly sheet metal part all are fixedly connected with the assembly passageway, two symmetrical assembly branch plates are arranged in the first assembly frame top, the utility model discloses, through stainless steel layer play to block high temperature resistance excellent, can be directly used in high temperature environment's structural member, then aluminum plate layer because its material lightweight and heat conductivity are good and through anodic oxidation form porous oxide layer and improve the heat -proof property, and the galvanized layer of galvanized steel layer can provide basic anticorrosion protection, and then use in combination with the heat -proof coating or interlayer structure, thereby play to the assembly sheet metal part heat -proof, and then block the transfer of heat and heat loss, make reduce because thermal expansion and cold shrinkage and the uneven internal stress and occur deformation, and the temperature field is even and prolongs the life, thereby improve the use effect.

The invention relates to the technical field of porous oxide powder, in particular to a preparation method of oxide powder with a micro-nano structure, which comprises the following steps: mechanically mixing specific metal source powder with organic powder serving as a pore forming agent and a stabilizer, then heating and calcining in an air atmosphere, and finally cooling to obtain a product. According to the invention, pores are formed by gas generated by decomposition of organic powder, and crystal grain sintering is inhibited by a carbon intermediate product, so that the problem that the low-melting-point metal and the alloy thereof are easy to melt and agglomerate during direct air calcination is successfully solved. The preparation method has the advantages of simple process, environmental protection, low cost and easiness in large-scale production, and the prepared oxide powder with the porous micro-nano structure has a wide application prospect in the fields of sensing, catalysis, energy and the like.

The invention discloses a preparation method and application of a non-spontaneous-combustion porous nickel-based catalyst, the non-spontaneous-combustion porous nickel-based catalyst mainly comprises a porous nickel skeleton and porous silicon dioxide or porous manganese dioxide, the content of Ni is 70-90 wt%, the content of Al is 5-10 wt%, and the content of SiO2 or MnO2 is 5-15 wt%, Ni, Al, Si or Mn metal is smelted and processed into metal alloy particles, an alkali activation dealloying process is used, the alloy particles are activated, and the catalyst is prepared. And washing to obtain the catalyst. The porous oxide layer is constructed on the surface of the porous nickel, so that the spontaneous combustion phenomenon caused by heat release due to violent oxidation of nickel in the presence of air is relieved, and the potential safety hazard of traditional Raney nickel and porous nickel catalysts is solved. A dealloying process is adopted, the porous nickel and the porous oxide layer are constructed in one step, the process is simple, and large-scale production is facilitated. Compared with a conventional Raney nickel catalyst, the prepared catalyst has more excellent catalyst activity and stability in the application of glucose hydrogenation production of sorbitol.

The invention provides a titanium alloy surface wear-resistant smooth micro-arc oxidation coating and a preparation method thereof, and relates to the technical field of surface coatings. The preparation method comprises the following steps: cleaning a titanium alloy component; the cleaned titanium alloy component serves as an anode, first stainless steel serves as a cathode, the titanium alloy component and the first stainless steel are immersed in first micro-arc oxidation electrolyte, the first micro-arc oxidation process is executed, and a porous oxidation film is formed on the surface of the titanium alloy component; the titanium alloy component with the porous oxidation film formed on the surface serves as an anode, second stainless steel serves as a cathode, the titanium alloy component and the second stainless steel are immersed in second micro-arc oxidation electrolyte, the second micro-arc oxidation process is executed, and a compact micro-arc oxidation coating is formed on the surface of the titanium alloy component; and grinding and polishing the compact micro-arc oxidation coating to prepare the wear-resistant smooth micro-arc oxidation coating. The quality of the titanium alloy coating can be improved.

This invention relates to the field of metal surface treatment technology. The method first involves anodizing an aluminum alloy sheet in a sulfuric acid electrolyte to obtain a porous oxide film. Then, using this film as the cathode, ultrasonic pulse electrochemical sealing is performed in a colloidal sealing solution containing an oxidant, organic fuel, and a boron source. Utilizing the ultrasonic cavitation effect and the relaxation characteristics of the pulsed electric field, directional deposition of colloidal particles deep within the micropores is achieved. Finally, gradient heat treatment completes low-temperature drying, liquid-phase pre-melting, self-propagating reaction initiation, and densification sintering. This method optimizes mass transfer and buffers thermal stress through a boron-source molten liquid-phase medium. It utilizes an in-situ self-propagating exothermic reaction to create localized high temperatures, promoting the transformation of the pore filler into a chemically inert, dense ceramic phase. This solves the problems of high-temperature cracking in traditional hydrated sealing layers and air pockets at the bottom of conventional physical filling pores, improving the high-temperature resistance, thermal shock resistance, and long-term chemical corrosion resistance of high-strength aluminum alloy sheets such as 6061 and 7075.

The application relates to the technical field of battery materials, and discloses a sodium-attracting modified current collector, a preparation method thereof and a sodium ion battery. The sodium-attracting modified current collector comprises a current collector substrate, and a first modification layer, a second modification layer and a third modification layer arranged on the surface of the current collector substrate in sequence; the first modification layer comprises a sodium-attracting metal material; the second modification layer comprises hard carbon and a liquid metal material; and the third modification layer comprises a porous oxide ceramic material and a sodium fast ion conductor. The sodium-attracting modified current collector can isolate sodium metal from contact with electrolyte, can relieve volume expansion, can avoid the tip effect, and has excellent electrochemical performance.