34 results about "Aluminum paste" patented technology

The invention discloses an anti-aging light-conversion silver black mulching film and a preparation method thereof, and belongs to the technical field of agricultural polymer films. The preparation method comprises the following steps: S1, mixing low-density polyethylene powder, aluminum paste, a complex light conversion agent, dioctyl phthalate and EVA (Ethylene Vinyl Acetate) to prepare silver light conversion master batches; s2, vinyl-terminated fluorosilicone oil, tert-butyl peroxybenzoate and linear low-density polyethylene powder are stirred for a reaction, and modified low-density polyethylene is obtained; the modified low-density polyethylene, maleic anhydride grafted polyethylene, a multi-effect light stabilizer and polyethylene wax are subjected to banburying granulation, and modified light-stable master batches are obtained; s3, carrying out banburying granulation on the low-density polyethylene powder, the polyethylene powder, carbon black, zinc stearate, ethylene bis-stearamide and the EVA powder to obtain black master batches; s4, blending the silver layer and the black layer, and performing double-layer co-extrusion to obtain the light-conversion silver-black mulching film. The light-conversion silver black mulching film provided by the invention has good mechanical properties and aging resistance.

The embodiment of the present application provides a kind of N type TOPCon cell front silver aluminum paste and its preparation method and cell, wherein, the N type TOPCon cell front silver aluminum paste provided in the embodiment of the present application includes aluminum powder, silver powder, nano alloy powder, organic binder, glass powder and organic additive, wherein the nano alloy powder is one or more of nano silver aluminum alloy powder, nano aluminum boron alloy powder and nano aluminum silicon alloy powder.In nano silver aluminum alloy powder, nano aluminum boron alloy powder and nano aluminum silicon alloy powder, all have the characteristics of nano size particle size, high tap density, low oxygen content and high activity, so that the front silver aluminum paste added with the nano alloy powder can quickly form a good alloy with silicon at a lower sintering temperature, reduce the contact resistivity of front silver aluminum fine grid and cell, not only avoid the appearance of top needle print during EL test, but also improve the filling of cell and the efficiency of cell.

The embodiment of the present application provides an IBC battery aluminum paste and an IBC battery, wherein the IBC battery aluminum paste provided by the embodiment of the present application comprises an organic additive, boron powder, aluminum powder, gallium powder, glass powder and an organic binder. By adding gallium powder in the aluminum paste, because the gallium element has etching effect and high density, it is faster than aluminum to drop to the silicon surface in the sintering process, so that the Ga-Si contact probability is increased, the contact resistance of the paste and the battery is reduced, and a high open circuit voltage can be maintained. At the same time, because part of the aluminum powder is replaced by gallium, the content of aluminum is reduced, which is beneficial to reducing the side effect of Al, so that the Al-Si reaction is weakened, the formed aluminum silicon corrosion pit is shallow, the recombination is reduced, so as to improve the open circuit voltage and the photoelectric conversion efficiency of the battery. Therefore, the problem that the existing IBC battery aluminum paste is easy to form metal recombination in the cooling process after being sintered into a positive electrode grid line, resulting in the decrease of the open circuit voltage and the photoelectric conversion efficiency of the battery piece is solved.

The invention belongs to the technical field of building materials for recycling wastes, and particularly relates to a process for mineralizing a concrete block by using industrial solid waste carbon dioxide. The industrial solid waste carbon dioxide mineralized concrete block process comprises the following steps: S1, adding modified steel slag powder, cement, fly ash and desulfurized gypsum into a stirrer for stirring and mixing to obtain a mixture; s2, adding a water reducing agent and aluminum powder paste into water, uniformly mixing, then adding quartz sand and the mixture, and uniformly stirring to obtain slurry; s3, the slurry is subjected to pouring forming and then cut into blocks through steel wires, then curing treatment is conducted, and the industrial solid waste carbon dioxide mineralized concrete is obtained. The concrete disclosed by the invention belongs to a light building material, not only realizes recycling of solid wastes and gas wastes, but also ensures good comprehensive performance.

The present application relates to the technical field of photovoltaic detection, more particularly, the present application relates to a kind of silver aluminum paste lap joint area influence on the test method and device of PERC cell open voltage.Silver aluminum paste lap joint area influence on the test method of PERC cell open voltage, comprising: silver paste is printed in the PERC test silicon piece without laser grooving, after drying, silver paste is printed using the same pattern screen printing, then print aluminum paste, after drying again, the printed silicon piece is sintered, then the electrode after sintering is tested using resistance tester, and the resistance tester reading is recorded.The present application test method is simple, pattern is simple, the influence of silver paste aluminum paste lap joint area on cell open voltage can be accurately measured, the accuracy of evaluating back silver silver paste performance data can be guaranteed, and the test efficiency can be improved, the influence of printing factors and test factors is small, data accuracy is high, and the data obtained by testing is convenient to handle, intuitive.

The invention relates to the field of coatings, and particularly discloses a metal texture coating and a preparation method thereof.The metal texture coating is prepared from, by weight, 60-85 parts of polymer emulsion, 20-35 parts of modified aluminum paste, 0.5-1 part of dispersing agent, 0.5-1 part of antioxidant and 10-25 parts of water; the modified aluminum paste is prepared by the following steps: step 1, fully dispersing a coupling agent, a molecular sieve and aluminum paste to obtain a feed liquid; and 2, acidizing polyvinyl alcohol powder, carrying out full contact reaction on the acidized polyvinyl alcohol powder and the vaporous feed liquid, finally adding a surfactant, and uniformly stirring. The preparation method of the metal texture coating comprises the following steps: uniformly mixing and stirring the polymer emulsion, the modified aluminum paste, the dispersing agent, the antioxidant and the water. The coating prepared by the invention is excellent in metal texture, good in glossiness, and excellent in water resistance and adhesive force.

A conductive aluminum paste composition is disclosed, including an aluminum-silicon alloy powder, an organic vehicle, and a glass powder, in which (1) the aluminum-silicon alloy powder has a silicon concentration of 30 mass % or more and 40 mass % or less, and (2) the glass powder contains a first glass powder and a second glass powder. The first glass powder contains 45% or more and 71% or less of PbO, 5% or more and 35% or less of B2O3, and 0.1% or more and 25.0% or less of SiO2 in terms of oxide mol %, and the second glass powder contains 35.0% or more and 55.0% or less of B2O3, 5.0% or more and 10.0% or less of SiO2, 1.0% or more and 20.0% or less of BaO, 5.0% or more and 25.0% or less of CaO, and 3.0% or more and 30.0% or less of K2O in terms of oxide mol %.

The invention relates to the technical field of aluminum paste, and discloses floating type water-based aluminum paste and a preparation method and application thereof.The floating type water-based aluminum paste is prepared from, by weight, 100 parts of aluminum powder, 90-120 parts of solvent and 15-50 parts of modifier; the modifier contains a large number of groups such as sodium sulfonate groups and imino groups, has large interfacial interaction force with the surface of aluminum powder, also contains comb-shaped polyether molecular chains, achieves a better agglomeration inhibition effect through steric hindrance, has an excellent dispersion effect, can enable the aluminum paste to be better dispersed in water-based emulsion, dispersoid and water-based paint, and has a good application prospect. The viscosity is smaller, and the storage stability is excellent. The water-based system of the aluminum paste is mild, aluminum powder can be prevented from reacting with a strong-acid and strong-alkali system, and the phenomenon that aluminum powder paint is inflated and swelled is reduced.

The application discloses a high-gloss electroplated silver coating composition, characterized in that the composition comprises, in percentage by weight, 1.8-2.2% of electroplated silver aluminum paste, 4.0-6.0% of electroplated silver resin, 0.04-0.06% of hydroxyl hyperbranched resin, 0.3-0.5% of blocked isocyanate resin, 0.03-0.05% of anti-silver dropping additive, 0.08-0.13% of additive, and 91.0-93.0% of solvent. The electroplated silver coating composition is used in combination with black primer and varnish, the 20° gloss of the composite coating is greater than 230, the gloss is much higher than the range value of 170-180 of the conventional electroplated silver coating composition, and the water resistance and recoating performance are qualified, and the electroplated silver coating composition can be used in combination with liquid varnish or powder varnish. The application further discloses an electroplated silver coating comprising the electroplated silver coating composition and a preparation method and application thereof.

The present application relates to the technical field of aerated concrete preparation, and particularly relates to a method for preparing electrically conductive aerated concrete by using porous carbonized recycled aggregate and the aerated concrete. The process method first places pre-wetted recycled aggregate in a pressurized carbonization kettle, and industrial waste gas with CO2 concentration greater than or equal to 20% is introduced to react for 2-3 hours at 0.5-0.7 MPa and 60-70 DEG C to produce porous carbonized recycled aggregate. Then the porous carbonized recycled aggregate is dry-mixed with gel material, gypsum, conductive carbon black and reinforcing fibers, and then mixing water containing water reducing agent (water aggregate ratio 55-60%) is added to stir into base mortar. Then aluminum paste suspension is added to the mortar, and after stirring to start aeration, the mortar is poured into a mold. After 2-3 hours of static aeration, the mold is finally autoclaved and dried for 6-8 hours to obtain the electrically conductive aerated concrete. Through aggregate pretreatment strengthening, orderly dispersion of the conductive phase and hierarchical curing control, the present application can effectively solve the contradiction between light weight, high strength, electrical conductivity and durability, and provide a multifunctional green building material solution for airport construction.

The invention discloses a phosphate fireproof coating with high volume stability and application thereof. The coating is prepared from the following raw materials in parts by weight: 1-5 parts of aluminum dihydrogen phosphate, 1-4 parts of magnesium oxide, 0.1-0.3 part of wollastonite fiber, 0.1-1 part of aluminum powder paste, 1-3 parts of vermiculite, 0.1-1 part of dolomite, 0.1-0.5 part of organic modified montmorillonite, 0.1-0.5 part of zinc borate and 0.1-0.3 part of expanded graphite. The preparation method comprises the following steps: firstly, premixing the magnesium oxide, the vermiculite, the dolomite, the organic modified montmorillonite, the zinc borate and the expanded graphite to obtain a mixed material; dissolving aluminum dihydrogen phosphate in a proper amount of water, adding wollastonite fibers and the aluminum powder paste, fully stirring to obtain a mixed solution, and carrying out ultrasonic treatment on the mixed solution until the mixed solution is not agglomerated; and finally, adding the mixed material into the mixed solution to obtain the slurry. The coating disclosed by the invention has excellent fire resistance and heat insulation property, high volume stability and excellent crack resistance, and is suitable for the field of fire prevention of steel structures with extremely high requirements on integrity of protective layers.

The utility model relates to the technical field of mobile phone middle plates, in particular to an auxiliary bracket for forming a mobile phone middle plate, which comprises a mobile phone middle plate formed by die-casting an aluminum material and an auxiliary bracket formed by die-casting a stainless steel material, the auxiliary support is arranged on the outer side of the mobile phone middle plate, a first material hole allowing aluminum paste to flow in and forming a connecting column is formed in the side face, facing the mobile phone middle plate, of the auxiliary support, and the first material hole extends outwards. The bottom of the auxiliary support is provided with a first discharging hole allowing a die-casting die slide to be inserted therein, and the first discharging hole is communicated and connected with the first material hole. At least the inner side face of the auxiliary support and the surfaces of the first material holes are coated with release agent layers. Compared with the prior art, when the mobile phone middle plate is subjected to die-casting forming, the connecting column is connected with the auxiliary support, when the auxiliary support is removed subsequently, the auxiliary support can be separated from the mobile phone middle plate only by disconnecting the connecting column, and large-area cutting operation is not needed, so that the cutting time is shortened, and the operation efficiency of the mobile phone middle plate is improved.

The invention discloses a high-strength low-thermal-conductivity self-insulation aerated concrete product and a preparation method thereof. The preparation method comprises the following steps: uniformly dispersing a pore-forming template agent into first water to obtain pore-forming template agent slurry; uniformly mixing the pore-forming template agent slurry with fly ash, cement, lime, desulfurized gypsum, aluminum powder paste and second water to obtain mixed slurry; the mixed slurry is subjected to forming, pre-curing and autoclaved curing, and the high-strength low-heat-conduction self-heat-preservation aerated concrete product is obtained. A unique raw material formula and process are adopted, a spontaneous pore-forming technology of a pore-forming template agent and a skeleton supporting effect are utilized to endow the product with multiple advantages of light weight, high strength, heat preservation, sound insulation, fire prevention, low cost and the like, and the requirement of an external wall heat preservation integrated material with low cost, high strength and low heat conductivity coefficient can be met by a single inorganic material; the overall performance of the fabricated building is improved, building energy consumption is reduced, and environmental protection is achieved. The method is convenient and efficient in construction.

The utility model discloses an aluminum paste screening machine convenient to clean, and relates to the technical field of screening machines, the aluminum paste screening machine convenient to clean comprises a base, the four corners of the bottom of the base are fixedly connected with supporting legs, the four corners of the top of the base are fixedly connected with supporting columns, and the tops of the four supporting columns are fixedly connected with a feeding hopper; a multi-dimensional vibration assembly is arranged at the top of the base, and a filter plate cleaning assembly is arranged in the multi-dimensional vibration assembly. By means of the filter plate cleaning assembly, residual materials on the filter plate can be cleaned in time, the filter plate can keep good screening performance all the time, the situation that the screening efficiency is gradually reduced due to blockage of the filter plate is avoided, the materials can make more sufficient contact with the filter plate under the action of multi-dimensional vibration through the arranged multi-dimensional vibration assembly, and the screening efficiency is improved. The aluminum paste with different particle sizes is more uniformly distributed on the filter plate, so that the screening process is accelerated, meanwhile, the opportunity that the aluminum paste passes through or is intercepted on the filter plate can be increased through multi-dimensional vibration, and the screening effect is improved.

The invention discloses a lightweight autoclaved aerated concrete block, and relates to the technical field of concrete blocks, the lightweight autoclaved aerated concrete block comprises the following raw materials: cement, lime, a base material, modified palygorskite, calcium sulfate dihydrate, aluminum powder paste, a foam stabilizer and deionized water; the modified palygorskite is added, and a fibrous structure of the modified palygorskite can form a network skeleton in slurry, fill internal pores and block capillary channels, so that the overall structural compactness and the surface strength of the building block are improved, and the drying shrinkage rate and the water absorption rate can be reduced; by adding the foam stabilizer, sodium alkyl benzene sulfonate in the foam stabilizer can reduce the surface tension of the slurry and promote the generation of a large amount of bubbles; the nano silicon dioxide can form a rigid supporting framework in a bubble liquid film, so that bubbles are prevented from being combined or broken; the polyvinyl alcohol forms an elastic protective film on the surface of the bubble, so that the service life of the foam is prolonged, the closed porosity of the building block is greatly improved, the lightweight characteristic of the building block is guaranteed, the drying shrinkage rate is reduced due to the pore uniformity, and the impermeability and the overall strength are improved.

The utility model relates to the technical field of material manufacturing engineering, in particular to a discharging mechanism of a ball mill for preparing aluminum paste, which is characterized in that an annular block is rotatably arranged at the bottom end of a bottom pipe, a cross rod is arranged on the inner ring of the annular block, and a stand column inserted into a discharging pipe is vertically arranged in the middle of the cross rod; a plurality of stirring rods and scraping rods are symmetrically arranged on the outer wall of the stand column, the scraping rods make contact with the inner wall of the discharging pipe, a first motor is arranged on one side of the bottom pipe, and a gear meshed with an annular block is arranged at the output end of the first motor. Materials are kept in a flowing state, and caking is avoided. In addition, the scraping rod can scrape materials attached to the inner wall of the discharging pipe, the problem that the discharging pipe is blocked is fundamentally solved, and discharging smoothness and efficiency are improved.

This application relates to the field of solar cell technology, providing an aluminum paste and its manufacturing method, a PERC cell, a module, and a system. The manufacturing method of the aluminum paste for PERC cells includes: preparing a boron-aluminum-silicon composite oxide; adding the boron-aluminum-silicon composite oxide to a glass base material to form a glass raw material; and using the glass raw material to prepare the aluminum paste. Thus, because the glass raw material of the aluminum paste includes the boron-aluminum-silicon composite oxide, boron can be better retained in the laser-drilled grooves, increasing the doping of the back electric field, thereby improving the back passivation effect of the PERC cell and contributing to improved photoelectric conversion efficiency.

The application relates to the technical field of metal recovery, and discloses a chemical silver extraction method and device for waste crystalline silicon photovoltaic cell pieces, which comprises the following steps: S1, removing the cell piece laminated piece, cutting and separating the metal frame and the glass and crushing; S2, putting the crushed pieces into an acid leaching device and adding a nitric acid-hydrofluoric acid mixed leaching agent; S3, filtering after reaction to obtain a silver-containing filtrate and a silicon residue; and S4, adding saturated NaCl solution into the silver-containing filtrate to generate white AgCl precipitate, filtering after standing and collecting the AgCl precipitate. The chemical silver extraction method for the waste crystalline silicon photovoltaic cell pieces realizes synchronous leaching of silver and aluminum, etching of silicon nitride and release of silver ions through one-step room-temperature synergistic leaching of a nitric acid-hydrofluoric acid compound system, and efficiently dissolves the aluminum paste layer in a short time, protects the silicon matrix, and realizes synchronous leaching of silver and aluminum and protection of the silicon matrix in a short time. In combination with a short-process silver chlorination and zinc powder replacement process, high-purity elemental silver and reusable silicon material are directly obtained, and the core problems of high energy consumption, low purity and heavy pollution in the traditional process are solved.

The invention belongs to the technical field of camouflage materials, and particularly discloses a coating with wet friction resistance and a camouflage function and a preparation method and application thereof.The coating is prepared from color paste and emulsion according to the weight ratio of (55-65): (35-45), and the color paste comprises deionized water, a water-based defoaming agent, a wetting dispersant, a humectant, pigment and extinction filler; the emulsion comprises aluminum paste, specific water-based resin, a light stabilizer and a high-activity NCO group curing agent; the coating can be used for preparing a camouflage net with a three-layer composite structure. The wet friction performance of the camouflage net is 2-3 levels, the gram weight is smaller than 300 g / m, the flexibility is good, flame retardance is achieved, the problems that a traditional coating is poor in wet friction resistance, unstable in camouflage effect and contradictory in protection performance and portability are solved, and the camouflage net meets the camouflage requirements of high-humidity and multi-friction scenes in multiple fields such as military equipment and outdoor facilities.

The invention relates to the technical field of paint, and discloses anti-floating silver gray finish paint for automobile refinishing paint and a preparation method thereof. The finishing paint is prepared from unsaturated polyester resin, maleic acid monoester aldehyde ketone resin, a diluent, a curing agent, a curing accelerator, an oxygen barrier, a defoaming agent, a flatting agent and aluminum paste according to the proportion of 100g: (20 to 35) g: (8 to 14) g: (1.8 to 2.6) g: (0.6 to 0.8) g: (0.02 to 0.04) g: (0.4 to 0.8) g: (0.3 to 0.6) g: (4 to 12) g. The maleic acid monoester aldehyde ketone resin and the unsaturated polyester resin have good compatibility and interface bonding strength, so that a paint film of the paint has better impact resistance, wear resistance and the like, meanwhile, the dispersity of aluminum powder of aluminum paste in the paint can be improved, the appearance flatness and smoothness and flooding and floating resistance of the paint film are improved, and the service life of the paint film is prolonged. And the paint film has better protective effects such as wear resistance and the like on the automobile.

The application discloses a light coating heat-shielding umbrella cloth and a preparation method thereof, and belongs to the technical field of sunshade fabrics. The umbrella cloth comprises a reinforced base cloth with a surface density less than 35 g / m2 and a breaking strength greater than or equal to 200 N, a color-keeping reflective bottom layer and a modified aluminum silver paste reflective surface layer are sequentially coated on the base cloth, the overall surface density of the umbrella cloth is less than 65 g / m2, the heat-shielding rate is greater than 65%, and the light color fastness is greater than or equal to grade 4. The application reflects heat through the cooperation of the double-layer coating, realizes light weight while ensuring high heat-shielding rate, has good color-keeping property of the coating, has no light glare phenomenon, and simultaneously has excellent ultraviolet-proof and waterproof performances. The application further provides a preparation method of the umbrella cloth and a preparation method of the modified aluminum paste. The application overcomes the technical problem that light weight and high heat-shielding performance are difficult to be simultaneously achieved in the prior art, and is suitable for a light sunshade umbrella.

The invention discloses a carbon quantum dot modified alumite glue layer coating composition and a preparation method thereof, and belongs to the technical field of coatings. Aiming at the defects of weak adhesive force, poor scratch resistance and water resistance and no anti-counterfeiting function of the traditional waterborne polyurethane alumite adhesive layer coating, the waterborne polyurethane alumite adhesive layer coating is prepared by taking waterborne polyurethane emulsion as a base material, introducing a fluorescent carbon quantum dot dispersion liquid prepared by a citric acid-ethanediamine hydrothermal method and a neutral chitosan solution, and compounding auxiliaries such as a dispersing agent and a wetting agent with specific properties. The paint is prepared through segmented stirring, filtering and defoaming processes. According to the composition, by means of the synergistic effect of the carbon quantum dots and the chitosan, the adhesive force, scraping resistance and water resistance of a coating are greatly improved, meanwhile, a stable invisible fluorescent anti-counterfeiting function is given, a heat sealing temperature window is wide, the preparation process is operated at normal temperature, and the composition is compatible with an existing production line. According to the method, technical characteristics are defined through accurate text description and quantitative data, repetition can be achieved without attached drawings, and the method is suitable for alumite gold stamping foil glue layers of high-end packages such as tobacco and wine, cosmetics and the like and has remarkable industrialization prospects.

The application provides a packaging method and system for replacing aluminum paste with copper metal, pretreating aluminum powder, removing oxides and impurities on the surface of the aluminum powder; preparing aluminum paste; printing the aluminum paste on a steel plate; observing the size and state of the printed aluminum paste using a microscope; preparing a copper sulfate aqueous solution; printing the aluminum paste on the top of a copper foot support, placing a wafer cut grain on the aluminum paste, and replacing the aluminum paste at a preset replacement temperature for a preset replacement time to obtain the aluminum paste replaced with copper metal. The application can achieve full replacement of the aluminum paste, and adding an interface active agent and hydrochloric acid to the copper sulfate aqueous solution can increase the replacement amount. The use of the additive ETU can also completely replace the aluminum paste under the grain, and the copper sulfate solution also has strong penetration, so that the replacement can react from the left and right gaps. The application can save space, reduce the overall replacement cost, and improve the replacement yield.

To provide a conductive aluminum paste composition to form a back electrode that suppresses erosion of the microcrystalline n+ silicon layer and forms good contact with the microcrystalline n+ silicon layer to achieve high conversion efficiency in a TOPCon type solar cell.SOLUTION: A conductive aluminum paste composition for a TOPCon type solar cell electrode includes aluminum-silicon alloy powder, an organic vehicle, and a glass frit, and the glass frit contains TeO2, V2O5, and B2O3, and the content of TeO2 is in a range of 30 to 40 mol% based on the total amount of the glass frit, and the content of TeO2 is x mol%, the content of V2O5 is y mol%, and the content of B2O3 is z mol%, and the value of [(y+z) / x] ranges from 1.5 to 1.9.SELECTED DRAWING: None

The utility model relates to the technical field of aluminum paste production, in particular to an online detection sampling device for aluminum paste production, and during sampling, a control valve and a recovery valve are opened, and a sampling valve is closed. The reflux pump is started, the aluminum silver paste sampling pipe is used for washing so as to remove possible residues and pipe wall attachments, and the aluminum silver paste returns to the reaction kettle from the recovery pipe by means of the pumping pressure provided by the reflux pump. And after cleaning for a period of time, closing the recovery valve, opening the sampling valve, and obtaining the required sample from the sampling outlet for detection. After sampling is finished, the control valve and the sampling valve are closed. Before sampling, the influence of residues and pollution on the sample can be effectively avoided by the pre-flushing operation, and the condition of the aluminum paste in the reaction kettle can be really reflected by the obtained sample. And the aluminum paste for washing is recycled to the reaction kettle, so that the loss of raw materials is reduced, the generation of waste liquid is reduced, and the cost and burden of waste liquid treatment are reduced. The method can be widely applied to the technical field of aluminum paste production.

The invention belongs to the technical field of magnesium alloy base material coating materials, and discloses a vehicle-mounted center control large screen magnesium alloy base composite coating and a preparation method and application thereof.The composite coating is constructed through a double-layer system of a bottom coating and a surface coating, the aluminum zinc phosphate hydrate and the mica powder functional filler are matched, and a pyrazole blocked isocyanate curing agent is adopted to realize high crosslinking; the surface coating is synergistically cured by high molecular weight thermosetting acrylic resin and a methyl etherified high imino melamine cross-linking agent, and is compounded with aluminum paste, mica powder and the like, so that excellent decorative property and protective property are realized, and the composite paint coating has the characteristics of excellent boiling resistance, salt fog resistance, wear resistance, scratch resistance and the like.

The embodiment of the present application provides a N-type IBC battery positive electrode grid line silver-aluminum paste, a N-type IBC battery and a preparation method thereof, wherein the N-type IBC battery positive electrode grid line silver-aluminum paste provided by the embodiment of the present application comprises an organic additive, silver powder, aluminum powder, boron powder, gallium powder, an organic binder and glass powder. By adding the silver powder, the boron powder and the gallium powder in the positive electrode grid line paste, printing on the passivation layer area above the p+ doped area, and then performing high-temperature sintering, the positive electrode grid line can be in contact with the p+ doped area and formed, the step of secondary laser slotting is saved, the passivation layer is prevented from being damaged by the secondary laser slotting, the formation of metal recombination centers is reduced, and the open-circuit voltage of the battery can be improved.

An aluminum paste stirring device relates to the technical field of aluminum paste production and comprises a stirring tank, a driving mechanism is mounted at the top of the stirring tank and drives a stirring shaft in the stirring tank to rotate, a housing is mounted outside the stirring shaft, stirring blades are arranged on the stirring shaft in a surrounding manner, and the stirring blades rotate in the housing. The liquid outlet holes are formed in the upper section of the housing in a surrounding manner, so that circular flow of the materials on the inner side and the outer side of the housing is formed, it is guaranteed that the materials in different areas in the stirring tank can be fully stirred and mixed, and excessive machining caused by the fact that aluminum paste makes contact with the stirring blades all the time is avoided; caked solid materials are crushed, so that the stirring efficiency and the stirring effect of the aluminum paste are improved.

The invention discloses a graphene / h-BN modified heat-conducting cooling anticorrosive coating and a preparation method thereof. The coating is prepared from 100 parts of organic silicon epoxy resin, 15-25 parts of xylene, 10-20 parts of butyl acetate, 30-50 parts of spherical aluminum oxide, 10-20 parts of flaky aluminum oxide, 3-8 parts of hexagonal boron nitride (h-BN), 3-8 parts of zinc oxide, 2-5 parts of boron phosphide, 5-15 parts of flaky aluminum silver paste, 0.1-0.5 part of light graphene oxide and auxiliaries. The preparation process of the coating comprises the following steps: (1) preparing the graphene / h-BN heterojunction composite filler; (2) pre-dispersing the basic filler; (3) low-speed mixing of the functional filler; and (4) adding auxiliaries and preparing a finished product. And (5) coating and curing. The graphene / h-BN heterojunction is constructed to cooperate with the aluminum paste, boron phosphide and other multifunctional fillers, a'reflection-conduction-radiation 'multi-mechanism heat dissipation synergistic system is formed in an organic silicon epoxy resin matrix, and meanwhile, the integrated functions of efficient heat conduction, sunlight reflection, radiation refrigeration and long-acting corrosion prevention are achieved.

The invention discloses a metal-effect water-based gold stamping replacing ink composition and a preparation method thereof, and belongs to the technical field of novel ink. Aiming at the defects of poor aluminum sheet orientation, weak mirror surface effect and insufficient durability of the existing water-based metal ink, a composite binder of a water-based acrylic emulsion and a water-based polyurethane dispersion is adopted, leaf-shaped modified aluminum paste subjected to phosphate surface treatment is matched, and the core innovation is a self-made liquid crystal induced orientation aid. The additive is prepared by compounding a cellulose nanocrystal aqueous dispersion and polyethylene glycol according to a specific ratio, performing ultrasonic or high-speed shearing activation to form a liquid crystal phase, and realizing highly parallel ordered arrangement of aluminum sheets through dual mechanisms of dynamic liquid crystal template induction and static hydrogen bond locking. The printing ink is low in VOC content, adapts to existing gravure flexographic printing lines, the glossiness of a printed ink film is larger than or equal to 90 GU, rubbing resistance and waterproof performance are excellent, a traditional gold stamping technology can be completely replaced, the comprehensive cost is reduced by 20%-40%, and the printing ink is suitable for the high-end fields of cigarette labels, cosmetic packaging and the like and has good industrialization prospects.