116 results about "Aluminum paste" patented technology

The invention relates to the technical field of paint, in particular to buried pipeline outer coating paint and a preparation method thereof. The coating comprises a component A and a component B, and the mass ratio of the component A to the component B is (2.12-2.39): 1; the component A comprises the following components in parts by weight: 40-50 parts of epoxy resin, 0-5 parts of a reactive diluent, 2-3 parts of an epoxy resin toughening agent, 2-3 parts of aluminum paste, 0-20 parts of mica powder, 5-20 parts of talcum powder, 5-10 parts of pigment, 5-20 parts of glass flakes, 1-2 parts of organic bentonite, 1-2 parts of a silane coupling agent, 0.1-0.5 part of a dispersing agent, 0.1-0.5 part of a defoaming agent and 0.1-0.5 part of a flatting agent; the component B is a cardanol modified phenolic aldehyde amine curing agent; the hyperbranched modified epoxy resin cooperates with the cardanol modified phenolic aldehyde amine curing agent and the epoxy resin flexibilizer to improve the comprehensive performance of the coating; the cathodic disbonding resistance of the coating is improved through the aluminum paste; therefore, the paint which has good comprehensive performance and can meet various corrosive environments is obtained.

The invention discloses a novel Topcon solar cell double-sided rate improvement method, which belongs to the field of Topcon cells, and comprises the following steps: selecting an N-type silicon substrate and carrying out double-sided texturing to obtain a textured silicon wafer; performing boron diffusion on the front surface of the textured silicon wafer to form a P + doping layer and a borosilicate glass layer; removing the borosilicate glass layer on the front surface of the silicon wafer after boron diffusion and the doped layer expanded on the back surface and the edge of the silicon wafer; a first tunneling oxide layer is formed on the surface of the silicon wafer substrate, and three doped polycrystalline silicon layers with different densities are deposited and formed without deposition pressure; performing low-pressure oxidation to form a silicon dioxide masking film, and then performing phosphorus diffusion segmented propulsion to obtain an initial battery piece; removing the wound-plated polycrystalline silicon on the front surface and the edge of the primary battery piece; printing silver aluminum paste, printing silver paste on the back surface, drying and sintering, and then carrying out light injection treatment. The double-sided rate of the Topcon battery is improved through the cooperation of the steps of controlling the alkali polishing process time, reducing the size of a back tower footing after alkali polishing, reducing the number of silk-screen printing grid lines, reducing the width of the grid lines and the like.

The invention relates to the technical field of screening devices, and discloses a multi-stage screening device for aluminum paste production, which comprises a discharging tank, the lower surface of the discharging tank is fixedly connected with a support frame, the upper surface of the discharging tank is fixedly connected with a fixing frame, the top of the fixing frame is fixedly connected with a motor, and the motor is fixedly connected with the discharging tank. The bottom of the fixing frame is fixedly connected with a transmission motor. By arranging the crushing mechanism, firstly, aluminum powder is poured into a screening disc, then a transmission motor is started to drive a threaded rod to rotate, when the threaded rod rotates, a crushing disc can move downwards, the aluminum powder condensed together can be extruded, the aluminum powder is crushed and dispersed, and when the crushing disc moves, a right-angle plate can be driven to move downwards; when the right-angle plate moves, the sliding frame can be driven to slide downwards on the inner wall of the sliding groove, when the sliding frame slides, the push rod can be pushed to move in the direction close to each other, and when the push rod moves, the concentrated telescopic ring can be pushed to contract in the direction close to each other on the inner wall of the screening disc.

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 present invention discloses a conductive silver aluminum paste comprising silver powder, aluminum powder, glass powder, silver aluminum paste additive, and organic carrier; when defining the total weight of the conductive silver aluminum paste as 100%, the weight percentage contents of the components are: silver powder 80.0%-88.0%. aluminum powder 0.5%-2.0%; glass powder 2.5%-6.0%; silver aluminum paste additive 0.1%-2.0%; organic carrier 8.0%-12.0%; wherein the glass powder comprises first main glass powder and second main glass powder, or comprises first main glass powder, second main glass powder, and auxiliary glass powder; the first main glass powder is glass powder in a Pb—Si—B—Li—O system, the second main glass powder is glass powder in a Pb—Bi—B—Li—O system, and the auxiliary glass powder is glass powder in a Ba—B—Si—Li—O system. The present invention further discloses a method for preparing a high-performance conductive silver aluminum slurry, an electrode, and an N-type TOPcon battery.

The invention discloses a colored aluminum pigment and a preparation method and application thereof.The colored aluminum pigment comprises aluminum paste, a first polymer resin layer, an organic dye layer and a second polymer resin layer, the surface of the aluminum paste is coated with the first polymer resin layer, and the surface of the first polymer resin layer is subjected to acid group modification; the colored aluminum pigment is prepared by the following preparation method: preparing aluminum powder coated with a first polymer resin layer; performing surface modification on the aluminum powder coated with the first polymer resin layer to obtain surface modified aluminum powder; performing air impact coating on organic dye and the surface modified aluminum powder to obtain a colored aluminum pigment substrate; and coating a second polymer resin layer on the surface of the colored aluminum pigment substrate. The aluminum pigment is subjected to multi-layer coating, organic dye and the surface modified aluminum powder are subjected to air impact coating, and the aluminum pigment has excellent aging resistance, is bright in color and is not prone to falling off.

The invention relates to the technical field of high-temperature-resistant anticorrosive coatings, in particular to a high-temperature-resistant anticorrosive high-solid-content coating for carbon steel and a preparation method thereof.The high-temperature-resistant anticorrosive high-solid-content coating is at least prepared from, by weight, 30-50 parts of epoxy modified organic silicon, 10-20 parts of aluminum paste, 0.8-1.5 parts of rheological additive, 10-20 parts of temperature-resistant filler, 10-15 parts of solvent, 3-10 parts of pigment and 3-5 parts of crosslinking additive. The product is low in cost, easy to construct, resistant to high temperature, capable of keeping excellent corrosion resistance after being resistant to high temperature, capable of meeting the practical application requirements of high-temperature places such as steel chimneys, high-temperature pipelines, high-temperature furnaces, petroleum cracking devices and military equipment, and easy to apply and popularize.

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 present invention discloses a glass frit for a conductive paste for the front surface of a TOPCon solar cell, a preparation method thereof, a conductive paste, a preparation method thereof, and a solar cell. The glass frit comprises a main glass frit A and a secondary glass frit B. The main glass frit A comprises the following components by weight: 30-80 wt% B2O3, 10-50 wt% SiO2, 10-50 wt% SeO2, and 0-20 wt% oxide additives; the secondary glass frit B is Pb-Si-Zn-B glass; and the weight ratio of the main glass frit A to the secondary glass frit B is 4:1-1:4. The glass frit provided by the present invention utilizes a high-borosilicate glass system, which is less corrosive and less susceptible to silicon nitride surface reactions. This system can control corrosion depth and reduce recombination, thereby increasing the open-circuit voltage. This solves the problem of open-circuit voltage drop caused by the use of conductive silver-aluminum paste in the P-type emitter of current TOPCon solar cells.

The utility model relates to the technical field of mixing devices, and in particular relates to water dosage type aluminum paste production equipment. According to the technical scheme, the device comprises a main body structure, a collecting mechanism and a mixing assembly, and further comprises the collecting mechanism located on one side of the main body structure; the mixing assembly is mounted in the main body structure, the main body structure comprises a bottom plate, a barrel body, a mounting frame, a supporting leg I, a flow guide hopper and a discharge pipe, the collecting mechanism comprises a collecting box, a discharge pipe, a supporting leg II, a filter screen, a stroke opening, a fan, a supporting plate and a flow guide plate, and the mixing assembly comprises a motor, a rotating shaft and a stirring rod. According to the utility model, during the production and processing of the water dosage type aluminum paste, dispersed dust formed by mixing aluminum powder with other raw materials and additives is sucked into the collecting box by the suction force of the fan, so that the water dosage type aluminum paste collecting device has the advantages of improving the working environment, protecting workers, reducing the cleaning work intensity of the workers and recycling resources.

The invention discloses aluminum paste, a water-based aluminum powder coating, a preparation method of the aluminum paste and electronic equipment, the aluminum paste comprises coated aluminum powder and an organic solvent, based on the total weight of the aluminum paste, the content of the coated aluminum powder is 40-70%, and the content of the organic solvent is 30-60%. The coated aluminum powder comprises aluminum powder, a first organic polymer layer coated with the aluminum powder, a pigment layer coated with the first organic polymer layer, a second organic polymer layer coated with the pigment layer and a silicon dioxide layer coated with the second organic polymer layer.

To provide a retroreflective coated article which is excellent in long-term stability of retroreflective property, and a method for manufacturing a retroreflective coated article for efficiently obtaining the retroreflective coated article.SOLUTION: There is provided a retroreflective coated article obtained by imparting retroreflective property to a coated object by coating, wherein an aluminum paste containing non-leafing type scaly aluminum particles is used in a reflection material and thereby can prevent gathering of aluminum particles on the surface of a coated film, white rust resistance is enhanced by suppressing the aluminum particles from contacting atmospheric air, a coated film is formed by coating a coating material containing the reflection material having improved retroreflective performance by bringing the aluminum particles into close contact with only a lower side of glass beads and a film-forming resin and dispersing the reflection material, glass beads are sprayed to the coated film before the coated film is cured, and then a retroreflective coated film where the glass beads are multilayered therein and a part of the glass beads is exposed on its surface is formed by curing the coated film.SELECTED DRAWING: Figure 1

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.

A high-performance conductive silver-aluminum paste, comprising a silver powder, an aluminum powder, a glass powder, a silver-aluminum paste additive and an organic carrier. Based on the total weight of the conductive silver-aluminum paste being 100%, the weight percentage contents of the components are: 80.0-88.0% of the silver powder, 0.5-2.0% of the aluminum powder, 2.0-6.0% of the glass powder, 0.1-2.0% of the silver-aluminum paste additive, and 8.0-12.0% of the organic carrier, wherein the glass powder comprises a first main glass powder and a second main glass powder, or comprises the first main glass powder, the second main glass powder and an auxiliary glass powder; and the first main glass powder is a Pb-Si-B-Li-O system glass powder, the second main glass powder is a Pb-Bi-B-Li-O system glass powder, and the auxiliary glass powder is a Ba-B-Si-Li-O system glass powder. The conductive silver-aluminum paste has the advantages of strong aging resistance, good contact and a high photoelectric conversion efficiency. Further disclosed are a preparation method for the high-performance conductive silver-aluminum paste, an electrode and an N-type TOPCon battery.

The invention provides a composite film as well as a preparation method and application thereof. The composite film comprises a white ethylene vinyl acetate layer, a polyethylene layer and a white ethylene vinyl acetate layer which are sequentially stacked from top to bottom, wherein the white ethylene vinyl acetate layer is prepared from the following raw materials: ethylene vinyl acetate, a filler, a first cross-linking agent, a first assistant cross-linking agent and a silane coupling agent; the filler comprises titanium dioxide and coupling agent modified sericite powder; wherein the mass ratio of the titanium dioxide to the coupling agent modified sericite powder is 1: (0.5-1); the polyethylene layer is prepared from the following raw materials: a polyethylene grafted fluoride monomer, white oil, polyethylene grafted glycidyl methacrylate, a second cross-linking agent and a second assistant cross-linking agent. The composite film has the effects of reducing the water vapor transmission rate and reducing the corrosion of water vapor and acid to silver-aluminum paste, so that the TOPCON single-glass assembly comprising the composite film has good PID resistance and damp-heat aging resistance.

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 belongs to the field of water-based passivated aluminum paste preparation processes, and relates to a preparation process of water-based passivated aluminum paste for injection molding, which comprises the following steps: obtaining spherical aluminum powder; carrying out ball milling treatment; performing water bath treatment. The process disclosed by the invention can meet the requirements of the market on high-performance, environment-friendly and low-cost injection molding paint.

The utility model discloses an environment-friendly scattering structure for aluminum paste production, which relates to the technical field of aluminum paste production and comprises a scattering box and a conveying box, the scattering box is communicated with the conveying box, the conveying box is fixedly mounted at the bottom end of the scattering box, a first rotating shaft is rotatably mounted in the scattering box, and a second rotating shaft is rotatably mounted in the scattering box. And scattering augers are fixedly installed on the first rotating shaft and the second rotating shaft, the pair of scattering augers are arranged in a staggered mode, a conveying shaft is rotationally installed in the conveying box, and a conveying auger is fixedly installed on the conveying shaft. By arranging the filtering assembly, scattered materials are conveyed to the filtering net bag through a conveying auger and a conveying pipe, a second driving motor drives a sector gear to rotate, and along with rotation of the sector gear, a sliding column moves up and down in a reciprocating mode, the bottom end of the filtering net bag is shaken up and down, and the materials are prevented from being accumulated on the filtering net bag; meanwhile, the filtering treatment on the materials is realized.

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 application discloses a preparation method of a back junction solar cell and the back junction solar cell. The preparation method comprises the following steps: forming a plurality of holes in an array arrangement on a front surface passivation anti-reflection layer of a P-type silicon substrate; arranging aluminum paste in the holes; performing first sintering on the P-type silicon substrate with the aluminum paste in the holes at 700 DEG C-950 DEG C, so as to form a P+ heavy-doped local front surface field, an aluminum electrode and an oxide layer covering the aluminum electrode; stripping the oxide layer covering the aluminum electrode; printing a plurality of silver paste lines on the front surface passivation anti-reflection layer, the silver paste lines being in contact with the front surfaces of the aluminum electrodes with the oxide layer stripped, and the silver paste lines being connected with the aluminum electrodes with the oxide layer stripped; and performing second sintering on the P-type silicon substrate with the silver paste lines, so that the sintering temperature of the second sintering is lower than the melting point of aluminum, and a silver electrode and the aluminum electrodes connected with the silver electrode form a front surface fine grid line of the back junction solar cell. The light-electricity conversion efficiency of the back junction solar cell is effectively improved.

The present disclosure generally relates to a burn-through aluminum paste composition and fired compositions thereof for selectively burn-through a passivation layer. In particular, the burn-through aluminum paste compositions of the present disclosure include an aluminum component and a glass component, where the glass component includes at least two glass frits. The present disclosure also relates to a method for preparing a burn-through aluminum paste composition and its use in the manufacture of a double sided PERC solar cell.

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.

This disclosure discloses a multilayer aluminum paste for use on the grid of a BC battery and its preparation method, belonging to the field of battery paste technology. The multilayer aluminum paste comprises: 60-80 parts by weight of aluminum powder; 0.8-5 parts by weight of glass powder; 2-5 parts by weight of organic resin; 15-20 parts by weight of solvent; and 0-2 parts by weight of additives; wherein the glass powder comprises 50-70% low-melting-point glass powder and 30-50% of at least one high-melting-point glass powder. This disclosure reduces the silver-aluminum bonding resistance and controls surface recombination of the battery by designing glasses with different melting points and sintering them at approximately 600°C, ensuring reliability while guaranteeing photoelectric conversion efficiency.

The present disclosure provides an anode foil and a preparation method thereof, and relates to the technical field of capacitors. The preparation method comprises: preparing a mixed aluminum slurry, wherein the mixed aluminum slurry comprises spherical aluminum powder, spherical aluminum oxide powder, a solvent, a binder and a dispersant; coating the mixed aluminum slurry on the surface of an aluminum foil substrate, and drying the aluminum foil substrate comprising the mixed aluminum slurry to obtain a powder layer aluminum foil blank; sintering the powder layer aluminum foil blank to obtain a sintered foil; shot peening the sintered foil to obtain an initial anode foil; washing and boiling the initial anode foil; and chemically treating the boiled initial anode foil to obtain a target anode foil. The preparation method disclosed in the present disclosure can improve the bending strength of the anode foil, and is helpful to realize the large-scale application of the anode foil.