380results about How to "Improve wettability" patented technology

The invention discloses a high-strength silver-free copper-based brazing filler metal which is composed of P, Sn, Ni and Cu. The high-strength silver-free copper-based brazing filler metal is low in cost, safe, environmentally friendly and good in welding effect; through the adding of Sn and Ni, the melting point of brazing filler metal alloy is reduced, and the tensile strength and wettability of the brazing filler metal alloy are enhanced.

The invention relates to an S-doped g-C3N4 coated modified graphite material, a preparation method thereof and a lithium ion battery negative electrode. The method comprises the following steps: mixing a g-C3N4 precursor with a sulfur source, and then carrying out heat treatment under the condition of shielding gas to obtain sulfur-doped graphite phase carbon nitride S-g-C3N4; carrying out plasma modification treatment on the surface of the graphite material by adopting plasma reaction gas to obtain modified graphite; mixing S-g-C3N4 with the modified graphite to obtain a mixed material; and calcining the mixed material in a protective gas environment to obtain the S-doped g-C3N4 coated modified graphite material. The invention also provides the graphite material prepared by the method and a lithium ion battery negative electrode prepared from the graphite material. The graphite material has relatively high conductivity, interface compatibility and structural stability.

This invention discloses a method for preparing a self-supporting silicon-carbon electrode sheet, comprising the following steps: preparation of expanded graphite, nitrogen doping, pore formation, silicon composite, and molding. Its innovation lies in: through the porous design of the nitrogen-doped expanded graphite matrix, combined with in-situ silicon coating and integrated molding process, an integrated electrode sheet with a three-dimensional elastic conductive network is constructed. By doping expanded graphite with nitrogen, the wettability of the electrode sheet to the electrolyte can be improved. The pores in the expanded graphite can serve as ion transport channels between graphite layers. Then, utilizing the microscopic two-dimensional sheet structure of expanded graphite, direct molding is achieved to realize efficient composite of graphite and silicon and complete the preparation of the negative electrode sheet in one step. This results in a breakthrough electrode sheet thickness reaching the 1mm level (far exceeding the tens of micrometers level of traditional current collectors), while also possessing high rate performance and excellent cycle stability. The three-dimensional structure maintains electrode integrity through a mechanical interlocking effect, and the structure has a certain degree of elasticity, allowing the material to maintain structural stability during repeated expansion / contraction caused by charging and discharging, significantly improving capacity retention.

The present application relates to the low temperature curing high-strength benzoxazine type silicone adhesive formula and use method, the formula includes the benzoxazine group containing organic silicon compound and organic alkali compound, the mass ratio of benzoxazine group containing organic silicon compound, organic alkali compound is 100:0.1-20.The adhesive of the present application is based on the cooperation between the benzoxazine group containing organic silicon compound and the basic catalyst, can be cured at low temperature, realize the higher strength bonding.The benzoxazine type silicone adhesive formula provided by the present application can be directly used as adhesive, and the bonding strength is high;It can also be used as a basic formula, used as an adhesive after adding other fillers, to meet the different needs of various special occasions.

The application provides a low-temperature sintering silicon nitride ceramic powder, a silicon nitride ceramic and a preparation method thereof, and uses beta silicon nitride powder as raw material and low-melting-point glass powder as a sintering aid. The beta silicon nitride powder with a content of 75-90wt% and a particle size range of 0.5-1um is selected, and the low-melting-point glass powder with a content of 10-25wt% is added. The mixed powder is ball milled, dried and pressed into a sheet, and then cold isostatic pressing is carried out, and pressureless sintering is carried out at 1400-1600 DEG C under a nitrogen atmosphere to obtain a silicon nitride ceramic material. The beta silicon nitride powder provided by the application can directly sinter the beta silicon nitride ceramic at low temperature. The preparation method of the silicon nitride ceramic provided by the application reduces the sintering temperature of the silicon nitride, improves the preparation efficiency of the silicon nitride ceramic, and is mainly applied to refractory fire-resistant materials.

The present application relates to the field of high-speed spraying technology, in particular to a supersonic flame spraying process for steam turbine blades. The present application overcomes the problems of insufficient coating bonding strength and poor corrosion resistance of the supersonic flame spraying. The present application uses nickel-coated alumina composite sand for sandblasting pretreatment of the blades to achieve micro-implantation of active nickel; adjusts the ratio of NiCr and Cr3C2-NiCr powders by using double powder feeders to build a gradient structure coating with continuous component change; uses a modified sealing agent containing nano-alumina for vacuum impregnation sealing; and finally obtains finished blades through graded vacuum diffusion annealing. Through surface nickel implantation, gradient structure design and diffusion annealing, the present application realizes metallurgical bonding and thermal stress matching between the coating and the substrate, greatly improving the bonding strength; at the same time, the in-situ ceramicization reaction of the sealing agent eliminates micro-pores, significantly enhancing the corrosion resistance of the coating.

The application relates to a pit mud preparation system, which comprises a feeding device through which pit mud is fed, a first cutting device which cuts the pit mud, a first conveying device, a second cutting device which cuts the pit mud again, a second conveying device, a first stirring device which stirs the pit mud after adding water, a granulating device which prepares the pit mud into strips, a third conveying device, a second stirring device which stirs the pit mud again after adding water, and a forming box. The application can improve the uniformity of the pit mud when the pit mud is cut through the first cutting device and the second cutting device. The pit mud is stirred twice through the first stirring device and the second stirring device, and the pit mud is granulated again through the granulating device between the two times of water stirring, so that the soaking effect of the pit mud is improved, the phenomenon that the pit mud is dry and wet after water stirring is avoided, the stirring effect of the pit mud is guaranteed, and the quality of the prepared pit mud is guaranteed.

The application relates to the technical field of lithium battery diaphragm, in particular to a high-stability lithium battery diaphragm and a preparation method thereof. The high-stability lithium battery diaphragm is prepared by the following steps: after a polypropylene film is irradiated by ozone and ultraviolet light in sequence, pre-deposition and pre-grafting are carried out on the surface of the polypropylene film, and then ultraviolet radiation treatment is carried out. The application realizes synergistic effect of nano-enhancement and self-repairing, solves the stability problem of traditional PP diaphragms in long-term cycles, and provides a reliable diaphragm solution for high-energy-density lithium batteries.

This invention relates to an insulating oil and an oil-paper insulation system containing superhydrophobic nanoparticles, as well as their preparation method and application, belonging to the field of electrical equipment insulation technology. This invention provides an insulating oil containing superhydrophobic nanoparticles, wherein the superhydrophobic nanoparticles are silane-modified nanoparticles, and the nanoparticles include at least one of SiO2, TiO2, and h-BN; the insulating oil includes at least one of mineral insulating oil, synthetic insulating oil, and natural ester insulating oil. This invention achieves the superhydrophobicity of the nanoparticles and good compatibility with the oil phase through silane modification. Adding silane-modified nanoparticles to the insulating oil effectively reduces the water content of the insulating oil and optimizes the interfacial performance of the oil-paper. Combined with the low-temperature, high-efficiency, and uniform rapid impregnation process of this invention, the overall electrical performance and service life of the oil-paper insulation system are significantly improved.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

The application discloses a WC+TiC particle reinforced high-entropy alloy coating and a preparation method thereof, and belongs to the field of coating preparation. The coating comprises a bottom layer, and the chemical components and mass percentages of the bottom layer are as follows: carbon: 0.1-0.5%, boron: 1-1.3%, chromium: 19-21%, nickel: 21-24%, silicon: 1-1.5%, molybdenum: 8-10%, cobalt: 22-24%, sulfur: 0.005-0.015%, phosphorus: 0.015-0.045%, and the balance is iron and inevitable impurities; and a working layer, and the chemical components and mass percentages of the working layer are as follows: WC: 15-25%, X: 1.5-4.5%, and the balance of components and the proportion between the components are the same as those of the bottom layer, wherein the X is TiC particles coated with Ni on the surface. The method is used for preparing the coating, and compared with a conventional coating, can effectively improve the wear resistance and corrosion resistance of the coating, and prolong the service life of equipment.

The invention provides a composite positive plate, a preparation method thereof and a battery, and belongs to the technical field of batteries. The interface conductive layer is arranged on at least one side of the positive electrode active material layer, and the interface conductive layer comprises conductive filler and an elastic matrix. According to the composite positive plate, the interface conductive layer with conductivity, flexibility and elasticity is arranged on at least one side of the positive active material layer, so that when the composite positive plate is applied to the battery and the interface conductive layer is close to one side of the diaphragm, not only can the interface impedance be reduced, but also the wettability of electrolyte on the positive active material layer can be improved; when the interface conducting layer is close to one side of the shell, the positive electrode active material layer can be better protected, extrusion damage of the shell to the positive electrode active material layer is reduced, the interface conducting layer can serve as a current collector, the electrochemical performance of the battery is improved, and the interface conducting layer can adapt to volume expansion of the composite positive plate in the charging and discharging process of the battery and improve the cycle performance of the battery.

The invention discloses a polypropylene film suitable for a film lamination method and a preparation method of the polypropylene film. The polypropylene film comprises the following components in parts by weight: 85.6-91.85 parts of polypropylene; 4-7 parts of long-chain branched polypropylene; 4-7 parts of a compatibilizer; 0.05 to 0.1 part of a nucleating agent; and 0.1 to 0.3 part of an antioxidant. Firstly, polypropylene is selected, so that the wettability of a melt to carbon fibers is effectively improved, and the filling defect caused by high viscosity of a traditional material is overcome; and secondly, the compatibilizer is introduced to form firm chemical bonding with the fiber surface, so that the interface bonding strength is greatly enhanced. And finally, by combining a precise extrusion and casting process, the prepared polypropylene film is uniform in thickness, excellent in interface performance and suitable for a film lamination method.

The invention discloses a process for preparing a V2O3 / ZnV2O3 total battery by simultaneously using vanadium oxide in a zinc ion battery as a positive electrode material and a negative electrode material, which comprises the following steps: reacting ammonium metavanadate with absolute ethyl alcohol by adopting a solvothermal synthesis method, washing, drying, and calcining in a tubular furnace to obtain V2O3; in the preparation process of the V2O3 positive electrode material, only V2O3, acetylene black serving as a conductive agent and PVDF serving as a binder are mixed in proportion and then are coated on graphite paper, other coating protection materials do not need to be introduced into a V2O3 / Zn negative electrode, and V2O3 is used as a protection layer to inhibit growth of zinc dendrites, relieve hydrogen evolution side reaction of the zinc negative electrode and reduce corrosion of zinc. Vanadium oxide V2O3 is directly used as a core positive electrode material, the zinc negative electrode coating is developed by utilizing the characteristics of the vanadium oxide V2O3, a material is formed, meanwhile, the performance optimization of the positive electrode and the negative electrode is realized, the used raw materials are simple and easy to obtain, the process is simple and easy to implement, and the preparation process is simple and easy to implement from V2O3 raw material synthesis to positive and negative electrode piece preparation to V2O3 / ZnV2O3 total battery assembly. And comprehensive improvement of positive and negative electrode performances of zinc ions is simultaneously realized by a single material.

This invention belongs to the field of electronic packaging and soldering materials technology, and relates to a lead-free solder powder for reflow soldering and its preparation method. This lead-free solder powder is based on a Sn-Ag-Cu alloy system, and achieves melt purification, β-Sn grain refinement, and interface IMC stabilization by adding trace amounts of Ce and Ni elements. Its composition, by mass percentage, is: Ag 2.9%–3.1%, Cu 0.45%–0.55%, Ce 0.01%–0.10%, Ni 0.01%–0.05%, with the balance being Sn and impurities. During preparation, a Ce-Ni master alloy is used to introduce microalloying elements, followed by vacuum melting, inert gas atomization, and surface treatment to obtain spherical solder powder. The resulting solder powder has low oxygen content, good wettability, slow interface IMC growth after reflow, high solder joint strength, and excellent thermal cycling reliability, making it suitable for high-reliability electronic packaging applications.

This invention discloses a method for preparing a multi-element metallized coating on a diamond surface, comprising the following steps: S1: Weighing salt, diamond, titanium powder, and nickel powder according to calculated masses, and grinding and mixing them uniformly for later use; S2: Transferring the mixed powder to a sintering boat, placing the sintering boat in a tube furnace, and obtaining a sample through a high-temperature salt bath plating process; S3: Performing cleaning, ultrasonication, drying, and sieving processes sequentially, and obtaining a Ti-Ni coated diamond powder product after sieving; S4: Characterizing the performance of the diamond powder product. This invention has the advantages of simple process, high preparation efficiency, energy saving and environmental protection, and low cost, and is suitable for large-scale production. Compared with traditional plating technology, this invention generates C-Ti and Ni-Ti bonds through a high-temperature salt bath plating process, which greatly improves the bonding strength and wettability of diamond, promoting the development of the diamond and its composite material products industry.

The invention relates to the technical field of oil and gas well reservoir transformation, and provides a permeability-enhancing surfactant for shale gas fracturing and a preparation method thereof, and the permeability-enhancing surfactant is synthesized from 3, 4-difluoromaleic anhydride, alkyl polyoxyethylene polyoxypropylene alcohol and sodium isethionate. According to the permeability-enhancing surfactant for shale gas fracturing, fluorine atoms in aliphatic fluoride enable the permeability-enhancing surfactant to have very good low surface tension and wettability, and meanwhile, epoxy groups are introduced into gemini surfactant molecules, so that the wetting effect can be improved, and the permeability-enhancing surfactant is environmentally friendly. Therefore, aiming at the characteristics of a shale reservoir, from the aspects of excellent surface performance, cost reduction, environmental friendliness and the like, the permeability-enhancing surfactant for shale gas fracturing, provided by the invention, has a relatively good practical application value.

This invention provides an arc-based additive and subtractive manufacturing method based on interlayer morphology reconstruction, belonging to the technical field of metal additive manufacturing. The method includes depositing an Nth layer of metal material on a substrate to form a deposition layer with a natural wavy morphology; acquiring actual morphology data to identify peak and valley distribution characteristics and planning a subtractive manufacturing path; selectively turning the deposition surface to obtain an anti-wavy substrate; detecting the surface temperature field of the anti-wavy substrate and cooling or preheating the substrate; and repeatedly performing arc-based additive deposition of the N+1th layer on the temperature-controlled anti-wavy substrate to complete the additive manufacturing process. This invention solves the technical problem in existing technologies where the wavy morphology between layers is not addressed, resulting in subsequent deposition layers covering and permanently remaining inside the workpiece, leading to a reduced yield. It achieves the technical effect of suppressing interlayer defects, reducing porosity by 90%, and improving internal quality.

The invention discloses an aviation spray auxiliary agent for improving the rain wash resistance of plant protection fog drops and application of the aviation spray auxiliary agent. The invention provides a composition for plant protection aviation spraying. The composition comprises sodium dodecyl benzene sulfonate and polyethylene glycol monostearate. The invention also provides a plant protection aviation spray auxiliary agent which comprises the composition. The plant protection aviation spray auxiliary agent provided by the invention can significantly improve the rain wash resistance of fog drops on crop leaves during aviation pesticide application, thereby solving the key problems that the window period of pesticide application in rainy seasons in the south is short, and the pesticide liquid is very easy to wash away by rain water due to frequent heavy rainfall.

The application belongs to the technical field of etching liquid, and particularly relates to a photoresist stripping liquid for OLED, a preparation method and application thereof. The photoresist stripping liquid comprises, with the total mass of the formula being 100%, 1-10% of organic alcohol amine, 2-5% of amidino compound, 0.1-3% of polyol, 0.01-0.2% of betaine type corrosion inhibitor, and the rest is organic solvent. The photoresist stripping liquid for OLED has excellent stripping performance and good protection effect on the Al layer. The photoresist stripping liquid is particularly suitable for stripping requirements of OLED devices containing Al, can safely strip the photoresist which is cross-linked and carbonized after solidification, and at the same time protects the Al process in the OLED device from being corroded, and has good application prospect.

The application discloses a kind of nano-permeable resin coating for construction in high-humidity water environment of desulfurization chimney lining anticorrosion, chimney lining includes reducing agent layer, reinforcing agent layer, primer layer, topcoat layer in turn from inside to outside, nano-permeable resin primer and topcoat can be permeated into the concrete matrix to form the anticorrosion layer of "matrix-coating", "mixing element integration", so that it not only has excellent acid corrosion resistance, but also has high and low temperature alternation and airflow scouring performance, solve the problem that chimney lining anticorrosion layer fails due to stress corrosion, also has good construction performance, solve the difficult problem that chimney lining anticorrosion layer construction period is short.

The invention provides a microstructure electrode capable of realizing solder confinement infiltration and a preparation method thereof, a radial microgroove structure, an annular microgroove structure and a parallel line microgroove structure are sequentially engraved on the surface of the electrode to form functional combinations of different microstructures, and the microstructure electrode capable of realizing solder confinement infiltration is obtained. Fine machining of the microstructures on the surface of the electrode and functional combination of different microstructures are adopted, the wettability of the welding flux is enhanced through the radial microgroove structures in the center area, the spreading shape of the welding flux is controlled through the annular microgroove structures in the edge area, overflowing of the welding flux is restrained, and diffusion of the welding flux is guided through the parallel line microgroove structures in the connecting area. Therefore, through mutual combination and accurate processing of the microstructures with different functions, confinement infiltration of the welding flux on the surface of the electrode is realized, and the welding quality of the electronic element and the electrode is optimized.

The present application relates to the technical field of battery preparation, and more particularly to a dry method multi-layer composite electrode film, a preparation method thereof, an electrode sheet and a battery. The dry method multi-layer composite electrode film comprises an electrolyte induction layer, an active material layer, a structure layer and a buffer layer. The electrolyte induction layer is formed by a polar organic high-molecular cross-linked organic film base material, and the electrolyte is better infiltrated into the electrode interior through the attraction of polar molecules to the electrolyte. The structure layer is supported by a high-strength organic film, which improves the structure and tensile strength of the dry method electrode self-supporting film. The buffer layer is formed by an elastic organic high-molecule film, which sets an elastic buffer layer for the multi-layer electrode sheet structure, plays a buffering role when the active material particles swell and shrink, and prevents the destruction of the PTFE fiber filament structure or the electrode sheet structure caused by the volume change of the particles. The present application solves the problems of low mechanical tensile strength, poor electrolyte infiltration and weak volume change resistance in the prior art.

The invention provides a preparation method and application of a composite diaphragm with a multistage nanometer branch structure, and belongs to the technical field of lithium metal batteries. A polymer matrix, a first structure inducer and a second structure inducer form a precursor solution, and the precursor solution is subjected to an electrostatic spinning process and in-situ induction to form the multi-stage structure composite diaphragm with a trunk-branch characteristic; the first structure inducer is a quaternary ammonium salt compound, and the second structure inducer is imidazolium ionic liquid. The dual-inducer system endows the lithium metal negative electrode with interface stability and cycle reliability.

The invention discloses a preparation method of a polypropylene composite filler based on electrocatalytic oxidation coal gasification fine slag as a raw material, the preparation method comprises the steps of raw material treatment, system modification, material electrolytic oxidation and material post-treatment, the polypropylene composite filler comprises polypropylene resin and the polypropylene composite filler, based on the total weight of the composite material, the usage amount of the composite filler is 5-20wt%, and the usage amount of the composite filler is 5-20wt%. The raw materials comprise an environment-friendly functional auxiliary agent accounting for 0.5-5% of the total weight of the composite material, and the functional auxiliary agent is selected from one of a weather-proof agent, a halogen-free flame retardant and a bio-based antibacterial agent. The method has the advantages that the low-temperature plasma pretreatment and the composite modifier assisted electrocatalytic oxidation process are combined, a large number of active sites can be quickly and efficiently introduced on the surface of the coal gasification fine slag through the low-temperature plasma treatment, and the surface energy and the reaction activity of the coal gasification fine slag are remarkably enhanced.

The application discloses a kind of enhanced Sn-Ag-Cu low silver lead-free solder and its preparation method and application, and the specific components of enhanced technical scheme are as follows: Cu: 0.5%~1.0%, Ag: 0.1%~1.0%, La: 0.002%~1.2%, Ge: 0.002%~1.3%, Co: 0.001%~1.2%, and the rest is Sn, calculated by mass percentage. Under the joint action of the added elements, the microstructure of the solder can be improved, thereby effectively enhancing the creep resistance of the solder, greatly improving the fatigue life of the solder at high temperature, and significantly improving the reliability of the solder.

This invention belongs to the field of lithium battery material technology, specifically relating to a metal oxide / mesoporous manganese dioxide / conductive polymer composite material, its preparation method, and its application. The preparation method includes the following steps: 1) ball milling a commercial metal oxide; 2) mixing the metal oxide powder with an organic polymer monomer and a methyl orange solution and ultrasonically dispersing the mixture to obtain a liquid mixture; 3) adding a potassium permanganate solution to the liquid mixture and performing a high-pressure hydrothermal reaction under stirring to obtain the composite material; 4) subjecting the composite material to alkali treatment, filtering, washing with water, and drying to obtain the metal oxide / mesoporous manganese dioxide / conductive polymer composite material. This metal oxide / mesoporous manganese dioxide / conductive polymer composite material can be used to prepare lithium battery cathode materials with high specific capacity, high conductivity, and high stability in a simple, efficient, and low-cost manner. It is easy to industrialize and solves the problems of low conductivity and poor rate discharge performance of traditional metal oxide cathode materials.

This invention pertains to compositions of polymeric compounds, specifically a recycled rubber powder modified asphalt based on a renewable composite activator, its preparation method, and its application. The recycled rubber powder modified asphalt comprises a base asphalt and activated rubber powder in a mass ratio of 1:(0.2~0.3). The activated rubber powder comprises waste tire rubber powder and a composite activator in a mass ratio of 10:(0.8~1.5). The composite activator comprises an organic phase and an inorganic phase in a mass ratio of (1.5~3):1. The organic phase is a chitosan-amino acid derivative, and the inorganic phase is a layered bimetallic hydroxide. Compared with existing technologies, the rubber powder modified asphalt prepared by this invention exhibits good high-temperature storage stability and interfacial structural integrity, demonstrating excellent anti-aging properties and high-temperature rutting resistance during long-term service.

The utility model discloses a chlorine liquefier tube head welding structure which comprises a tube plate and a plurality of heat exchange tubes, and the heat exchange tubes are arranged on the tube plate in a penetrating mode. The length of the part, extending out of the tube plate, of the tube head of the heat exchange tube is 0-1mm; the tube plate is provided with a groove used for being connected with a heat exchange tube, and the angle of the groove ranges from 45 degrees to 60 degrees. The heat exchange tube is in interference fit with the hole wall of the tube plate through expanded connection, and the groove is filled with a welding seam to fixedly connect the heat exchange tube with the tube plate. According to the chlorine liquefier pipe head welding structure, the welding quality of the chlorine liquefier pipe head can be improved, the connection reliability is enhanced, and leakage is effectively prevented.

This invention discloses a high-stability lithium battery separator, its preparation method, and its application, relating to the field of lithium-ion battery separator materials technology. The key technical points are that the separator is a multilayer composite structure, comprising: a polyolefin microporous base membrane; a ceramic nanoparticle layer uniformly loaded on the surface of the base membrane; and a cross-linked polymer coating covering the ceramic layer. The ceramic nanoparticles have a particle size of 10-100 nm, the coating thickness is 1-5 μm, and the overall separator porosity is 35%-55%. The ceramic nanoparticles are selected from at least one of alumina (Al2O3), titanium dioxide (TiO2), or magnesium hydroxide (Mg(OH)2), and are fixed to the base membrane surface by a sol-gel method or a spraying method. The ceramic nanoparticle layer constructs a heat-resistant support framework, which can limit the dimensional shrinkage of the polyolefin microporous base membrane under high-temperature conditions, reducing the risk of short circuits caused by separator thermal shrinkage.