20results about How to "Barrier contact" patented technology

This invention belongs to the technical field of aluminum powder passivating agents, specifically relating to an aluminum powder passivating agent and its preparation method. The preparation method of the aluminum powder passivating agent includes the following steps: heating a solvent, adding anchoring functional monomers, including styrene-based phosphoric acid, hydroxyethyl methacrylate phosphate, and 2-methacryloyloxyethyl phosphate, stirring until homogeneous, continuing to add mixed monomers, stirring until homogeneous, adding a mixed solution of initiator and solvent dropwise, allowing the reaction to complete, adding solvent to adjust the solid content after the reaction, cooling to room temperature, and obtaining the aluminum powder passivating agent. This invention provides a novel aluminum powder passivating agent and its preparation method. This passivating agent forms a stable protective layer through surface passivation, effectively blocking the contact between aluminum powder and water, inhibiting hydrogen generation, avoiding can bulging, and exhibiting high stability.

The application discloses an antioxidant composite ceramic aerogel and a preparation method thereof, and belongs to the technical field of composite ceramic aerogels.The main body of the antioxidant composite ceramic aerogel is a silicon nitride aerogel, the nanostructure of the silicon nitride aerogel is one of one-dimensional silicon nitride nanowires and two-dimensional silicon nitride nanobands or a combination of the two nanostructures, and a mullite coating and a copper-nickel metal coating are sequentially coated on the nanostructure of the silicon nitride aerogel from inside to outside.The application can solve the technical problem that the prior art cannot prepare silicon nitride ceramic aerogels which can stably serve in a high-temperature oxygen environment at low cost and in batches.

The invention discloses a tin-zinc-copper powder ultrafine powder batch preparation process, and relates to the technical field of metal powder preparation, and the tin-zinc-copper powder ultrafine powder batch preparation process comprises the following steps: dissolving tin salt, zinc salt and copper salt in deionized water, adding a complexing agent, and uniformly mixing to obtain a mixed metal salt aqueous solution; dissolving a rosin-based polyamine hyperbranched dispersant in an organic solvent to serve as an oil phase; slowly adding a mixed metal salt aqueous solution into the oil phase, and uniformly dispersing to obtain a water-in-oil microemulsion system; dropwise adding a reducing agent solution, and continuously carrying out heat preservation reaction for 0.5-3 hours after dropwise adding is finished, so as to obtain slurry containing alloy particles; and carrying out demulsification treatment, centrifugal separation, repeated washing and drying to obtain the surface-modified tin-zinc-copper superfine powder. Superfining of particles is achieved through confinement growth, synchronous co-deposition of multi-component elements is guaranteed, a homogeneous alloy phase is formed, component segregation is avoided, and a protective layer formed on the surface of the powder in situ endows the material with excellent oxidation resistance and good weld-aid wettability.

This invention discloses a low-corrosion chloride molten salt heat transfer and storage medium, method, and application, belonging to the field of molten salt thermal storage technology. The high-heat-capacity, low-corrosion carbonate molten salt heat transfer and storage medium of this invention is composed of 18%~22% potassium chloride, 6%~10% sodium chloride, 1%~3% aluminum powder, 1%~3% magnesium powder, 1%~3% zinc powder, with the remainder being zinc chloride. Its key feature is the introduction of metal powder into the molten salt, which not only achieves excellent thermal storage performance at 600℃~800℃, but also reduces corrosion by utilizing the potential regulation ability of dissolved metal ions and the formation of highly active [Al] from gaseous chloride products through physical and chemical adsorption. This low-corrosion chloride molten salt heat transfer and storage medium achieves excellent thermal storage performance and low corrosivity, and can be applied in solar thermal power generation and molten salt energy storage.

This invention discloses a chromium-free passivation and fingerprint-resistant composite treatment method for high-aluminum-zinc-aluminum-magnesium steel plates, belonging to the field of metal sheet surface protection technology. The specific steps of the method are as follows: A fine-grained high-aluminum-zinc-aluminum-magnesium steel plate is selected as the substrate, and firstly, it undergoes multi-stage cleaning and hot air drying. Next, the dried substrate is immersed in a composite chromium-free passivation solution to form a passivation precursor film. Then, a porous inorganic passivation layer is prepared through low-temperature hot air curing. Subsequently, a modified fingerprint-resistant resin is roller-coated onto its surface to form an organic precursor film. Finally, a constant-temperature curing treatment is performed to produce a chromium-free passivation and fingerprint-resistant composite film. This invention uses multi-stage cleaning and chromium-free passivation processes on the high-aluminum-zinc-aluminum-magnesium steel plate to form a porous inorganic passivation layer, enhancing corrosion resistance. Then, a composite protective film layer is constructed by reverse roller coating of modified fingerprint-resistant resin, achieving functional integration. This process improves the environmental protection and protective properties of the plate, meets the needs of multiple fields, and expands the application scenarios and market scope.

The invention relates to the technical field of aluminum electrolysis metallurgy, in particular to an aluminum electrolysis carbon anode anti-oxidation coating and a preparation method thereof. The coating is prepared from the following raw materials in percentage by mass: 45-60% of aluminum oxide powder; 15 to 25% of water glass; 8-12% of potassium feldspar powder; 0.5 to 2% of sodium fluoride; 7-11% of sodium acetate trihydrate; 8-12% of ionized water; the preparation method comprises the following steps: S1, preparing the catalytic compact component; s2, mixing the coating; s3, coating and drying; and S4, carrying out high-temperature calcination. The product provided by the invention has good oxidation resistance, adhesive force and compactness, and the preparation method provided by the invention has the advantages of simple process and low cost.

This application relates to a passivation treatment solution, aluminum alloy components, and a method for preparing the same. The passivation treatment solution comprises a solvent and components dispersed in the solvent at the following concentrations: fluorozirconate 5 g / L–30 g / L, fluorinated silane coupling agent 10 ml / L–50 ml / L, polyphenol complexing agent 1 g / L–8 g / L, and silicate 5 g / L–25 g / L. The passivation treatment solution, through a multi-component synergistic formulation composed of fluorozirconate, fluorinated silane coupling agent, polyphenol complexing agent, and silicate, exhibits different functions and molecular bridging synergistic effects. After passivation treatment of anodized aluminum alloys, the alkaline corrosion resistance of the aluminum alloys can be significantly enhanced.

The application discloses an electrolyte and a battery. The electrolyte comprises an electrolyte, a solvent, a first additive and a second additive. The first additive is selected from at least one of structural formula (1) to structural formula (4), and the second additive is selected from at least one of structural formula (5) to structural formula (7). The first additive has high oxidation resistance, and contains an unsaturated double bond which can be polymerized to form an SEI protective film on a negative electrode. The protective film inhibits the volume expansion of the silicon negative electrode. The second additive can form a polymer film on the surface of a positive electrode under high voltage, which can improve the oxidation resistance of the electrolyte. Through the joint action of the first additive and the second additive, a stable film layer is formed on the surface of the electrode, the volume expansion of the electrode is inhibited, the interface on the surface of the electrode is prevented from being damaged by expansion stress, the contact between the electrolyte and the electrode material is blocked, the oxidation resistance of the electrolyte is improved, the performance stability of the battery under high voltage is improved, and the high-temperature storage and cycle performance of the battery are improved.

This invention relates to the fields of fine chemicals and polymer materials technology, specifically a method for manufacturing toy adhesives. It includes steps for preparing the adhesive base material, preparing borax solution, and cross-linking molding. Polyvinyl alcohol, guar gum, methylparaben, etc., are prepared as base materials, which are then reacted with borax solution to undergo a cross-linking reaction. The core of this invention is the strict limitation of specific high-temperature ranges and constant-temperature stirring times during the base material preparation process, which promotes the complete extension and entanglement of molecular chains, constructing a dense and uniform three-dimensional network structure. This invention effectively avoids microscopic particle residue and stress concentration, achieving a significant improvement in the tensile strength, elongation at break, and resilience of the toy adhesive.

The invention discloses an underwater super-oleophobic polyvinylidene fluoride porous membrane with oil stain adhesion resistance and a preparation method of the underwater super-oleophobic polyvinylidene fluoride porous membrane, and belongs to the technical field of material preparation. Aiming at the problem that the performance of the existing underwater super-oleophobic material is reduced due to the fact that the existing underwater super-oleophobic material is easily adhered and blocked by oil stains, the material is obtained by sequentially constructing a polyvinyl alcohol / tannic acid-polyethyleneimine hydrophilic layer and an amino-modified flexible molecular brush grafting layer on the surface of a polyvinylidene fluoride porous membrane. According to the composite structure, the membrane has underwater super-oleophobicity and dynamic oil stain adhesion resistance, oil drops can be effectively prevented from being attached and accumulated on the surface of the membrane, the anti-pollution performance of the membrane in the oil-water separation process is remarkably improved, and the service life of the membrane in the oil-water separation process is remarkably prolonged. The membrane can efficiently and continuously separate the oil-in-water emulsion with the stable surfactant under the assistance of vacuum, the process is simple, and the membrane has a good practical application prospect.

The invention discloses a wall-crossing tower crane mounting structure and a construction method thereof.The construction method of the wall-crossing tower crane mounting structure comprises the steps that two vertical frame bodies are provided, a plurality of wall penetrating sleeves with the length equal to the thickness of a to-be-spanned wall are provided, and a plurality of half transverse rods arranged in the height direction of the vertical frame bodies at intervals are fixedly mounted on each vertical frame body; the half transverse rods on the two vertical frame bodies are made to be opposite in pairs to form a plurality of pairs of half transverse rods, and the two half transverse rods in each pair of half transverse rods are detachably connected in a butt joint mode to form a plurality of first transverse rods; according to the non-standard transition joint of the tower crane, the problem of cross-wall arrangement of the tower crane in a narrow and small space is solved, the cost of later plate repairing and large-scale machine dismantling is avoided, the cost is saved, the arrangement flexibility of the tower crane is improved, and the construction period is shortened. And the dismantling safety risk is reduced, the construction efficiency is improved, and the high popularization value is achieved.

This utility model relates to a printer, comprising: a frame; a printer core including a support assembly, a printhead assembly, and a roller assembly, wherein the support assembly is movably mounted on the frame, the printhead assembly is connected to the support assembly, and the roller assembly is disposed opposite to the printhead assembly; a paper feed motor mounted on the frame; a cutter assembly including a fixed bracket positioned above the frame; a contact spring located between the fixed bracket and the frame, the contact spring including a base plate and a support leg, the base plate being disposed on the outer bottom wall of the fixed bracket, and the support leg being connected to the housing of the paper feed motor and the support assembly; and a wire, the first end of which is connected to at least one of the support assembly, the housing of the paper feed motor, the fixed bracket, and the contact spring, and the second end being used for grounding; the housing of the paper feed motor, the support assembly, the fixed bracket, and the contact spring are all made of conductive materials. This device can discharge static electricity generated by the paper feed motor, the printer core, and the cutter assembly through a single contact spring, making assembly and disassembly convenient.

This invention relates to the field of marine fouling protection and bactericidal materials, and particularly to a quaternary ammonium salt / copper pyridinethione / montmorillonite composite antibacterial material, its preparation method, and its application. The quaternary ammonium salt / copper pyridinethione / montmorillonite composite antibacterial material uses montmorillonite as a carrier, with quaternary ammonium salt and copper pyridinethione intercalated between the montmorillonite layers. The preparation method involves obtaining copper-loaded montmorillonite through ion exchange, and then introducing pyridinethione anions and quaternary ammonium salt into the copper-loaded montmorillonite to obtain the quaternary ammonium salt / copper pyridinethione / montmorillonite composite antibacterial material. This material exhibits good adsorption performance, high stability, and durability, maintaining its antimicrobial effect for a long time, reducing the frequency and cost of antiseptic treatment, and has broad application prospects.

The application relates to a vacuum rapid-congealing continuous furnace safety door which comprises a door frame arranged at the bottom of a continuous furnace, a maintenance opening arranged at the bottom of the continuous furnace and located in the door frame, a rectangular frame arranged at the front end of the door frame, a door body hinged to one side of the door frame, a plurality of pressing devices arranged on the rectangular frame and used for pressing the door body on the rectangular frame, and an observation window arranged on the door body. The safety door structure provides a preset rapid channel for the bottom of the furnace body. When extreme working conditions such as molten crucible liquid leakage or cooling system water leakage occur, the bottom safety door can be quickly opened to drain water.

This invention provides a single-cavity explosion-proof electromagnetic relay, comprising a base plate, a coil support on one side of the base plate, a coil mounted in the coil support, an adsorption plate above the coil support for contacting normally open or normally closed contacts, normally open, normally closed, and other contacts integrated into the base plate, a contact heat-conducting plate embedded within the base plate for contacting the normally open or normally closed contacts, and the upper and lower ends of the coil respectively contacting the coil heat-conducting plate; an inner sleeve connected to the base plate is provided outside the coil support, an outer sleeve is provided outside the inner sleeve, and a support grid is provided inside the outer sleeve, forming a gap between the inner sleeve and the outer sleeve for resin casting; heat dissipation fins are bolted to the outside of the movable cover. This invention maintains excellent explosion-proof performance while ensuring heat dissipation performance, achieving a balance between the two and meeting the requirements for use in a single explosion-proof cavity.

The invention relates to the field of solid electrolyte, in particular to a method and a device for improving air stability of sulfide solid electrolyte. The method comprises the following steps: placing a solid fluorinating agent in a first temperature zone reaction device, heating the solid fluorinating agent at a first temperature, and decomposing the solid fluorinating agent to generate HF-containing gas; and placing the sulfide solid electrolyte in a second temperature zone reaction device, vacuumizing the second temperature zone, introducing the HF-containing gas generated in the first temperature zone, and keeping the temperature for 1-3 hours at the second temperature. According to the method, a uniform and compact fluoride shell layer is generated in situ on the surface of the sulfide solid electrolyte through a gas-solid reaction, and a core-shell structure is formed. The shell layer can effectively prevent air from being in contact with a substrate, the air stability of the material is remarkably improved, the process is safe, toxic gas residues are avoided, raw materials are cheap and easy to obtain, and the shell layer is suitable for large-scale production.

The application discloses a high-temperature oxidation-resistant ceramic aerogel and a preparation method thereof, and belongs to the technical field of ceramic aerogels.The main body of the high-temperature oxidation-resistant ceramic aerogel is a silicon nitride aerogel, the nanostructure of the silicon nitride aerogel is one of one-dimensional silicon nitride nanowires and two-dimensional silicon nitride nanobands or a combination of the two nanostructures, and the nanostructure of the silicon nitride aerogel is sequentially coated with a silicon carbide precursor coating and a zirconium carbide precursor coating from inside to outside.The application can solve the defects that traditional ceramic aerogels are prone to oxidation failure under superhigh temperature and are difficult to be prepared at low cost and in large scale.

The application belongs to the technical field of fertilizers, and particularly relates to an environment-friendly urea slow-release fertilizer and a preparation method thereof. The preparation method of the urea slow-release fertilizer comprises the following steps: S1. Modified sodium-based montmorillonite is added to water, and a modified sodium-based montmorillonite suspension is obtained after ultrasonic dispersion; urea and puhuizi polysaccharide are uniformly mixed and preheated to obtain mixed particles; S2. The modified sodium-based montmorillonite suspension is sprayed on the surface of the mixed particles, and the environment-friendly urea slow-release fertilizer is obtained after drying. The method is simple and easy to operate, and the obtained fertilizer has excellent slow-release performance.

This invention relates to the field of fish farming technology, specifically to a fish feeding device, comprising a feed storage bin and a mounting bracket installed on the outer wall of the feed storage bin. A discharge pipe is located at the bottom of the feed storage bin, and a first opening / closing assembly, a second opening / closing assembly, and a feed dispensing assembly are sequentially installed inside the discharge pipe from top to bottom. This invention utilizes the linkage design of the first and second opening / closing assemblies. The rotating disc plate rotates, and a rotating long plate is driven to rotate via a first linkage rod. The rotation of the long plate, through a hinged rod, causes the opening / closing plate to slide symmetrically within the discharge pipe, achieving double-layer closure and opening of the discharge pipe. This effectively prevents moisture from contacting the fish feed inside the feed storage bin, preventing the fish feed from becoming damp and clumping.

The application discloses an EPDM sealing material for electronic water pump shaft seals and a preparation method thereof, and belongs to the technical field of rubber sealing materials. Double-bond modified hexagonal boron nitride and trifluoropropyltrimethoxysilane composite nanospheres are used as auxiliary reinforcing phases. The double-bond modified hexagonal boron nitride is a layered ceramic material with the characteristic of easy sliding. The trifluoropropyltrimethoxysilane composite nanospheres have a hollow structure and play a role similar to that of a ball bearing in the rubber matrix. The two can synergistically reduce the friction between the rubber molecular chains, so that the rubber molecular chains can more freely slide and deform under stress, can absorb stress at high and low temperatures, have good temperature impact resistance, and can adapt to the working requirements of electronic water pump shaft seals in cold northern regions.