138 results about "Silver coating" patented technology

The invention discloses a coating and a method for recovering precious metals in a physical vapor deposition process. The coating mainly comprises a silver coating positioned on the lower layer and an organic silicon modified layer positioned on the surface of the silver coating. Before precious metal is recycled, the coating is prepared on the surface of the position where precious metal needs to be recycled in the physical vapor deposition process, after physical vapor deposition is completed, an adhesive tape is adopted to be pasted to the surface of the coating, and then the precious metal is stripped from the surface of the coating in a mode of tearing the adhesive tape; or scraping the surface of the coating by adopting a tool, so that the noble metal is stripped from the surface of the coating, and stripped noble metal chips are collected; and finally, the adhesive tape with the precious metal or the collected precious metal scraps are heated, and the precious metal is recycled from a heating product. According to the method, efficient stripping and efficient recycling of the precious metal can be achieved, the coating has no influence on physical vapor deposition equipment and the technological process, and the method is simple in technology, high in operability, environmentally friendly, free of pollution and high in economical efficiency when the precious metal is recycled and can be applied to the recycling process of the precious metal on a large scale.

The invention discloses high-oxidation-resistance flaky silver-coated copper particles and a preparation method thereof, and relates to the technical field of silver-coated copper powder. The process comprises the steps of flaky copper powder preparation, copper powder pretreatment, silver coating plating and post-treatment. The surface of the copper powder is pretreated, and active sites on the surface of the copper powder are reduced; secondly, a zinc phosphate plated film is formed, full coverage of a silver layer is achieved by adding nano-silver to assist in a silver ammonia solution, meanwhile, micropores of the silver layer are filled, and the compactness of the silver-coated copper powder is improved; besides, the silver content of the silver-coated copper powder is controlled to be 8.7-14.6%, and the normal-temperature oxidation resistance of the silver-coated copper powder is improved, so that the optimal anti-oxidation effect is achieved, and performance deterioration caused by oxidation is reduced.

The invention provides fine grid slurry and a preparation method thereof, a solar cell and a photovoltaic module. The fine grid slurry is prepared from the following components in parts by weight: 50 to 65 parts of silver powder, 15 to 25 parts of silver modified nickel-coated copper powder, 2 to 5 parts of alloy powder, 2 to 5 parts of glass powder, 0.5 to 2 parts of aluminum oxide, 10.5 to 17.5 parts of organic carrier and 0.5 to 1.8 parts of additive, the silver-modified nickel-coated copper powder comprises a copper inner core, a nickel coating layer and a silver coating layer, wherein the outer surface of the copper inner core is sequentially coated with the nickel coating layer and the silver coating layer from inside to outside. The alloy powder comprises Ni element, B element and Si element; the aluminum oxide is spherical nano aluminum oxide; the organic carrier comprises organic silicon modified acrylic resin and epoxy resin. According to the fine grid slurry, the raw material cost is remarkably reduced, the process compatibility is good, silk-screen printing can be better supported, and the photoelectric conversion efficiency of a photovoltaic module can be better improved.

The invention relates to the technical field of composite metal materials, in particular to a silver-coated graphene copper composite material and a preparation method thereof, and aims at solving the problems that traditional silver-coated copper powder is high in silver consumption, copper is oxidized due to the fact that a silver layer is prone to being damaged, and conductivity is insufficient. The method comprises the steps that a graphene coating layer is formed on a copper powder substrate in situ through chemical vapor deposition, and graphene copper powder is obtained; performing etching treatment on the graphene copper powder to controllably expose part of the copper substrate so as to form anchoring points for silver ion deposition; carrying out reduction treatment on the etched graphene copper powder so as to ensure that an anchoring site has chemical activity; in a reductive liquid phase environment, enabling a chemical silver plating solution to react with the graphene copper powder subjected to reduction treatment, and guiding silver ion deposition by utilizing an anchoring point, so as to form a silver coating layer on the surface of the graphene coating layer; and separating and drying the reacted system to obtain the silver-coated graphene copper composite material. The material is better in oxidation resistance and conductivity, and the process is free of waste liquid.

This invention relates to the field of photovoltaic technology and discloses a conductive silver-coated copper micropowder for photovoltaic applications and its preparation method. This preparation method aims to solve the problem of balancing performance and cost in existing silver-coated copper micropowders for photovoltaic applications. In this invention, during the pretreatment stage, the base copper powder is acid-washed but not water-washed. It undergoes pH adjustment, organic pre-bonding treatment, and gradient ammoniation to retain the activity of the copper powder and construct a uniform copper-ammonia complex layer. In the chemical silver plating stage, the pretreatment solution is added to a composite base liquid containing a complexing agent, organic amine, dispersant, and combined reducing agent. A silver-ammonia solution is then added dropwise under ultrasonic dispersion and nitrogen protection. In the post-treatment stage, the product undergoes ethanol reflux desorption, antioxidant treatment, vacuum drying, and low-temperature plasma activation, followed by sieving to obtain the final product. This method can achieve uniform and complete silver coating even with low silver content, providing a feasible path for the large-scale replacement of pure silver powder for photovoltaic applications with silver-coated copper micropowder.

The present application belongs to a kind of anti-tarnish sealant, for the technical problem that existing anti-tarnish agent can only extend the tarnish time, reduce the degree of tarnish, and the high temperature stability is poor, the silver-plated parts after treatment poor acid and salt fog ability, provide a kind of silver coating water-based anti-tarnish sealant, anti-tarnish film and its preparation method, anti-tarnish sealant includes yttrium zirconium composite sol, silane coupling agent, alkyl mercaptan, emulsifier, wetting agent, penetrant and water, it is proved to have the dual role of anti-tarnish and sealing silver coating hole, can significantly improve the anti-tarnish ability and acid and salt fog resistance of silver coating, and has very high high-temperature stability, can withstand 900 ℃ high-temperature baking.

The utility model discloses vacuum coated glass which comprises a glass body, the upper end of the glass body is provided with a silver coating, the outer surface of the glass body is provided with a limiting frame, the upper end of the glass body is provided with a transparent protection plate, the transparent protection plate is made of a polycarbonate plate or an acrylic plate, and the side face of the limiting frame is provided with an inlet hole. A hidden groove is formed in the inner wall of the limiting frame, the hidden groove corresponds to the position of the entering hole, a push rod is arranged in the hidden groove, matching grooves are symmetrically formed in the inner wall of the limiting frame, and the matching grooves communicate with the hidden groove; a second spring is installed on the inner wall of the matching groove and fixedly connected with the push rod. The transparent protection plate is installed at the upper end of the glass body, the glass body is protected through the transparent protection plate, so that the silver coating on the surface of the glass body is prevented from being damaged by external force, and meanwhile, the transparent protection plate is convenient to replace, convenient and fast.

The invention discloses a preparation device and a preparation method for producing and processing highland barley flavor tofu in a plateau low-oxygen environment, and belongs to the technical field of tofu processing, the preparation device comprises a centrifugal drier main body, and the centrifugal drier main body is provided with a pump suction structure; the pumping structure comprises an electric pump mechanism and a filtering mechanism, the filtering mechanism comprises a filter shell unit, and a filter element assembly is arranged on the filter shell unit; the filter element assembly comprises a transparent top plate, and a blocking piece is arranged on the transparent top plate. In the filtering process of the filtering structure, bacteria in drained water can be killed through the nano-silver coatings loaded on the surfaces of the inner filtering plate and the first elastic membrane, the number of the bacteria in the drained water is effectively reduced, and after the centrifugal drying machine body is closed, the bacteria surviving on the inner filtering plate are killed through the nano-silver coatings, so that the bacteria in the drained water are effectively reduced. Blockage of filter holes of the inner filter plate caused by breeding of bacteria on the inner filter plate is effectively avoided, meanwhile, the number of microorganisms such as bacteria in discharged wastewater can be effectively reduced, and ecological protection of plateau regions is facilitated.

The application relates to the field of four-silver coated glass, and particularly discloses a colorless four-silver LOW-E glass, which comprises a glass substrate and a composite film layer deposited on the surface of the glass substrate; the composite film layer is a four-layer silver coating structure formed by compounding SiNx, AZO, NiCr, Ag, ZnAlOx and ZnSnOx in a predetermined order; the thickness of each film layer is accurately controlled; the glass obtained has the following parameters: the glass surface color parameters are Rg=5.7, a*=-0.8 and b*=0.8; the film surface color parameters are Rf=3.9, a*=-1.4 and b*=-0.7; the visible light transmittance T is 67.5%; and the transmittance color parameters are a*=-4.5 and b*=-4.5. The glass surface and the film surface are both colorless, the glass has high light transmittance, and the colorless appearance and the optical transmittance performance are both considered.

This application provides a conductive polyimide film and its preparation method, belonging to the field of conductive materials. The method involves preparing a polyamic acid solution, mixing surface-coated rod-shaped silver powder with the polyamic acid solution, and then performing a casting process followed by gradient heating to obtain a polyamic acid film enriched with rod-shaped silver powder at the bottom. The rod-shaped silver powder-rich surface of the obtained polyamic acid film is then subjected to an ion exchange reaction with a silver nitrate solution. The ion-exchange film is then cleaned and subjected to thermal imidization treatment to obtain the conductive polyimide film. This application utilizes the ion exchange reaction and subsequent thermal curing process to reduce silver ions on the film surface, forming a silver-plated layer with excellent adhesion and conductivity. This material exhibits excellent reliability during use; even if the surface silver-plated film partially peels off due to wear, the conductive network built by the rod-shaped silver powder at the bottom can still serve as a backup conductive path, significantly improving its long-term stability in practical applications.

The invention discloses a preparation method of silver-coated copper slurry suitable for TOPCON, and relates to the technical field of battery preparation, and the preparation method comprises the following steps: preparing silver-coated copper particles; silver-coated copper particles are mixed with a glass system, an organic system and nanoscale silver particles according to the mass ratio to prepare silver-coated copper slurry; the silver-coated copper particles sequentially comprise a copper core, an aluminum oxide protection layer, a nickel layer and a nano-silver coating layer from inside to outside, and the silver-coated copper slurry is formed by mixing the silver-coated copper particles, a glass system, an organic system and nano-scale silver particles according to a mass ratio. The glass system is composed of bismuth oxide-boric oxide composite glass, zinc oxide-silicon oxide composite glass and tellurium oxide glass. According to the invention, the silver-coated copper particles with a multi-layer coating structure are used as a main conductive phase and are combined with the nano-silver particles, so that the conductive performance is ensured, the raw material cost of the paste is reduced, the cost pressure is dealt with, the problems of copper core oxidation and ion migration are solved, and the paste can be kept stable in a high-temperature and high-humidity environment.

The invention relates to the technical field of automobile part production, and particularly discloses an intelligent active anti-fog automobile lamp system based on a nano-silver composite coating, which comprises a lamp shell, a mask, a lamp panel, an infrared LED lamp, an intelligent control unit, a temperature and humidity sensor, a nano-silver coating and a surface-mounted NTC thermistor sensor, the invention further discloses a manufacturing method of the intelligent active anti-fog vehicle lamp system based on the nano-silver composite coating, and the intelligent active anti-fog vehicle lamp system based on the nano-silver composite coating comprises three functional modules, namely a photo-thermal conversion nano-silver coating material, a light source excitation module, an infrared LED lamp and an intelligent control unit. According to the core principle, nanometer photonics, thermodynamics and an automatic control technology are deeply fused, three functional modules including a nanometer silver photothermal conversion coating material, a light source excitation module, an infrared LED lamp and an intelligent control unit are integrated inside, the manufacturing process is reasonable, the function is safe and reliable, intelligent active anti-fog of the automobile lamp is achieved, manual intervention is not needed, and durability is achieved.

This invention discloses a titanium-aluminum metal rotating target and its preparation method, belonging to the field of target material technology. The preparation method includes the following steps: preparing a pure silver coating on the surface of a stainless steel backing tube using conventional cold spraying; depositing a titanium-aluminum deposition layer on the pure silver coating surface using vacuum cold spraying, and simultaneously subjecting the deposition layer to laser shock peening using a laser shock intensification process; repeating the above steps until the total thickness of the titanium-aluminum deposition layer reaches a preset thickness. This method is simple to operate, has high material utilization, and is not limited by target size, enabling the preparation of large rotating targets. The prepared target has high density, small grains, uniform structure, low gas content, and high bonding strength with the backing tube. The pure silver coating further enhances the conductivity and sputtering uniformity of the target.

A silver-coated resin particle (10) includes a resin particle (11) made of a resin composition and a silver coating layer (12) formed on the surface of the resin particle (11), characterized in that the silver-coated resin particle (10) contains silicon oxide in a range of 0.04 mass% or more and 3.00 mass% or less, and the content of tin is 0.20 mass% or less. The 5% compression elastic modulus (5% K value) is preferably 2.5 GPa or less. The resin composition is preferably one or two or more selected from the group consisting of an acrylic resin, a styrene resin, a phenol resin, a polyurethane resin, and a polyimide resin.

Disclosed in the present invention are a radar-transparent high-luminance silver coating, and a preparation method therefor and the use thereof. The high-luminance silver coating comprises: at least one aluminum pigment, with the weight percentage thereof being less than or equal to 1.5%; at least one silver pearlescent pigment, with the weight percentage thereof being 0.5-4.0%; and a solvent-type base material having a high content of an orienting agent, wherein the weight percentage of the effective content of the orienting agent in the solvent type base material is greater than 5%. In the present invention, a low addition amount of the aluminum pigment is used in combination with the silver pearlescent pigment having high covering properties to prepare the radar-transparent high-luminance silver coating in a base material system having a high content of the orienting agent; an increment in radar transmission loss caused by the silver coating is less than 0.5 dB, the optimal L15° is greater than 140, and the silver coating can also have good angle-dependent color shifting performance, flickering properties and covering power, and obvious metallic appearance; and the silver coating is expected to be applied to usage scenarios having requirements for both silver appearance and radar signal transparency.

The invention discloses composite silver powder and a preparation method thereof. Relates to the field of silver powder preparation. The preparation method of the composite silver powder comprises the following steps: S1, carrying out surface hydroxylation treatment on copper powder to form a surface modification layer; s2, in the presence of a dispersing agent, a silver coating layer is deposited on the surface modification layer through multi-stage reduction reaction sequentially using a weak reducing agent and a strong reducing agent, and composite powder is obtained; and S3, carrying out surface anti-oxidation treatment on the composite powder by using a coordination agent to form a surface protection film. According to the composite silver powder prepared through the method, the interface bonding force is improved, and the problem that a traditional core-shell structure is prone to stripping is solved; through a multi-stage reduction process and a seed crystal induction-oriented growth mechanism, the requirement of precision electronic paste printing on particle size uniformity is met; the flexibility is improved, and the reduction of the conductivity caused by the cracking of the silver layer is avoided.

The invention discloses antioxidant silver-coated copper powder and a preparation process thereof, and relates to the technical field of silver-coated copper powder. The process comprises the steps of copper powder pretreatment, two-step complexing silver coating, hydrophobic membrane forming and airflow powder mixing. The compactness and oxidation resistance of a silver layer on the surface of the copper powder are enhanced through two-step complexing, the oxidation resistance of the silver-coated copper powder is improved to a great extent, meanwhile, the cost of the treatment, complexing and silver plating processes of the copper powder is controlled to a low degree, and the cost is reduced by combining organic passivation treatment; and the preparation cost of the silver-coated copper powder is low, batch production of the silver-coated copper powder is facilitated, and the market competitiveness is improved.

This invention discloses a method for preparing silver-tin oxide wire for rivet-type contacts. The technical solution employs a bidirectional hot pressing process, which greatly improves the density of the ingot, resulting in near-fully dense finished wire. This improves the wire's plastic deformation capability and avoids cracking abnormalities caused by poor material density during subsequent rivet manufacturing. A low-hardness pure silver plating layer is formed by spraying onto the ingot surface, directly preventing the high-hardness silver-tin oxide layer from contacting the extrusion liner, extrusion die, extrusion nozzle, drawing die, and annealing fixture during hot extrusion, hot drawing, and annealing processes. This significantly improves the surface quality of the final finished wire, thereby mitigating cracking abnormalities during final rivet manufacturing. The hot spraying process forms a multi-layered composite material in the extruded wire: a low-hardness, easily machinable pure silver coating layer and an internal high-hardness, brittle AgSnO2 structure. This significantly reduces the fracture abnormalities that occur during subsequent hot drawing, improving the material yield.

The invention relates to silver-coated copper powder and a preparation method thereof.The preparation method comprises the steps that copper powder is added into an acid solution containing an acid reagent and stirred, after stirring is stopped, solid-liquid separation and washing are conducted, then drying is conducted, and pretreated copper powder is obtained; preparing a copper powder mixed solution containing a dispersing agent, a reducing agent, a wetting agent, a pH regulator and the pretreated copper powder; adding a silver source solution containing silver nitrate and a complexing agent into the copper powder mixed solution, and reacting to obtain silver-coated copper powder slurry; according to the method, the wetting agent is matched with the complexing agent to regulate and control deposition of silver ions on the surface of the copper powder, it can be guaranteed that the surface of the copper powder makes full contact with the silver ions, and it can be guaranteed that the complexing silver ions are evenly released; the silver-coated copper powder with a uniform and compact silver coating and stable properties is prepared, and the silver-coated copper powder has wide application prospects in the fields of electronic paste, new energy, catalysis and the like.

The application relates to the technical field of metal electroplating, in particular to a continuous silver plating production line which comprises a frame, a plurality of silver plating tanks which are arranged at intervals on the frame, water washing tanks which are respectively arranged at two ends of the frame, a plurality of electroplating rollers which are loaded with parts to be processed, and a moving crane which is used for grabbing the electroplating rollers and moving along the frame, the electroplating rollers are internally provided with cathode discharge devices, an anode placing box is arranged between two adjacent silver plating tanks, the moving crane can automatically transfer the electroplating rollers between the water washing tank at a feeding end, the plurality of silver plating tanks and a water washing tank at a discharging end along the frame, and under the joint electrolysis of the anode placing box and the cathode discharge devices, a silver plating layer with uniform thickness is formed on the surface of the parts, and the application has the characteristics of improving production efficiency.

The utility model relates to a laser tube field especially relates to a reflective window device of carbon dioxide laser tube and a carbon dioxide laser tube, and the reflective window device includes: fin, the top surface of fin is equipped with silver plating, reflector, places on the top surface of fin, and is equipped with arc groove on reflector bottom surface, and the area between arc groove and silver plating is filled with heat conduction layer. The edge of arc groove contacts with the fin, makes reflector and fin become annular contact, the edge of arc groove and the fit of the fin can produce greater static friction value, even if reflector is subjected to slight external force, can also pass through friction force offset, makes reflector can be more stable and place on the fin, through the cooperation of heat conduction layer and silver plating, the heat of arc groove place is passed to the fin through heat conduction layer, silver plating, realizes heat conduction, avoids the situation that cannot radiate because arc groove is not directly contacted with the fin.

The invention belongs to the technical field of electroplating control, and particularly relates to a GIS conductive arm silver coating thickness control method based on dynamic electric field simulation, so as to solve the technical problem that an existing model lacks a mechanism capable of adjusting anode current according to a simulation result and generating a specific executable time-sharing segmented control strategy. The control method comprises the following steps: S1, establishing an electrochemical simulation environment; s2, calculating a local conductivity attenuation matrix to correct the electric field model; updating the three-dimensional geometric model of the GIS conductive arm according to the corrected surface growth rate distribution, and adjusting the next time step according to the maximum coating increment of the current time step; and S3, forming an anode current time-sharing segmented control sequence for guiding an actual electroplating process. According to the method, the uniformity and thickness controllability of the silver coating of the GIS conductive arm are improved, waste of precious metal materials is reduced, and a technical path is provided for electroplating of workpieces.

The graphene radiant panel structure comprises a base layer substrate, a conductive silver layer, a graphene heating layer and an insulating layer, a first silver coating and a second silver coating of the conductive silver layer are respectively and correspondingly provided with a power connection end part and a heating main body part except the power connection end part, the first silver coating and the second silver coating are symmetrically arranged on the surface of the base layer substrate; the graphene heating layer is arranged on the surfaces of the base layer substrate, the first silver coating and the second silver coating; the insulating layer is arranged on the surfaces of the base layer substrate and the graphene heating layer. In this way, it is ensured that the graphene heating layer and the base layer substrate are sintered, welded and formed, the structural stability and sintering uniformity of all the layers are ensured, and the interlayer bonding strength is improved; the current distribution is optimized by symmetrical silver sheet layout, the heating surface uniformity effect is achieved, and the electrothermal conversion efficiency is improved.

This invention provides a functional cyanide-free silver plating method and coating structure, belonging to the field of metal surface treatment technology. This invention adds a trivalent chromium plating layer between the cyanide-free copper plating layer and the cyanide-free silver plating layer prepared by existing technology. The trivalent chromium plating layer provides electrochemical protection to the underlying copper plating layer, and the resulting coating structure effectively prevents corrosive media from eroding towards the substrate. The trivalent chromium plating layer has excellent corrosion resistance, effectively resisting corrosion from corrosive media, overcoming the defect of copper rust easily appearing on the surface of parts plated directly on copper plating layers. Simultaneously, by controlling the composition of the plating solution and adding lanthanum chloride heptahydrate and praseodymium chloride heptahydrate, the two have a synergistic effect, further improving the corrosion resistance of the plated parts.

Environment-friendly silver-coated shading fabric processing equipment comprises a mounting seat, a swing shaft is arranged in the mounting seat, the mounting seat comprises a top mounting plate and a bottom mounting plate, a swing shaft mounting seat is arranged on the upper surface of the bottom mounting plate, and a rotating plate is arranged in the middle of the lower surface of the top mounting plate. An embedded ball seat is arranged on each of the upper surface of the swing shaft mounting seat and the lower surface of the rotating plate, the swing shaft comprises two swing ball heads which are respectively arranged at the top and the middle of the swing shaft, the swing ball head at the middle position is embedded in the embedded ball seat in the swing shaft mounting seat, and the swing ball head at the top is embedded in the embedded ball seat in the rotating plate; according to the structure, the coverage area and the movement flexibility of the atomizing nozzle are obviously increased; and the driving device drives the rotating plate which is eccentrically arranged to rotate through the belt wheel, so that the uniformity and irregularity of the swinging track of the spray head are ensured, and a spraying blind area is avoided.

The invention provides a method, equipment and a system for producing energy-saving glass, and relates to the technical field of coating processes. The method comprises the following steps: manufacturing a film with a silver coating; the thin film is a flexible plastic film; a magnetron sputtering coating process is implemented on the thin film through magnetron sputtering equipment to prepare a silver coating through deposition; implanting the thin film coated with the silver coating between laminated glass; a sealing structure is arranged corresponding to the interlayer of the laminated glass, so that the interlayer becomes a closed cavity, and the closed cavity is subjected to vacuum pumping treatment by using vacuum pumping equipment. The invention provides the method for conveniently producing the energy-saving glass, the implementation object of the magnetron sputtering coating process is changed from glass to the flexible plastic film from the aspect of the manufacturing process, the processing and the use of the coating process in actual production are facilitated, and meanwhile, the manufacturing cost of the energy-saving glass by a manufacturer is saved.

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.

A titanium-aluminum metal rotary target and a preparation method therefor are disclosed, pertaining to the technical field of target materials. The preparation method includes following steps: preparing a pure-silver coating on a surface of a stainless-steel backing tube by a conventional cold spraying method; depositing a titanium-aluminum deposition layer on a surface of the pure-silver coating by a vacuum cold spraying method, and performing laser shock on the deposition layer using a laser shock peening process while depositing the titanium-aluminum deposition layer; and performing the above step iteratively until a total thickness of the titanium-aluminum deposition layers reaches a preset thickness.

The invention provides a water-based electrosilvering coating for an automobile hub and a preparation method of the water-based electrosilvering coating, and belongs to the technical field of paints.The preparation method of the coating comprises the following preparation steps that deionized water, a dispersing agent, a water-based hydroxyl acrylic acid dispersion, a defoaming agent, a flatting agent and dipropylene glycol monobutyl ether are evenly mixed, pH is adjusted, and a premixed resin material is obtained; the preparation method comprises the following steps: mixing an ethanol solution with cyanomethyl [3-(trimethoxysilyl) propyl] trithiocarbonate, adding glacial acetic acid and water-based aluminum paste, stirring, filtering, washing, dispersing in deionized water, adding a sulfobetaine methacrylate monomer and potassium persulfate, heating, reacting, cooling, filtering, washing, mixing with deionized water, and drying to obtain the water-based aluminum silver paste. Modified water-based aluminum paste is obtained; and mixing and stirring the premixed resin material and the modified water-based aluminum paste, adjusting the viscosity and pH of the paste, filtering, standing and curing to obtain the water-based electrosilvering coating for the automobile hub. A coating prepared from the coating has good hardness and corrosion resistance.

This invention discloses a multi-layer chip shielding structure and its fabrication method, relating to the field of shielding technology. The structure includes a metal shield, which is a multi-layered structure comprising a suppression layer, an absorption layer, and a reflection layer. While still using a metal shield to form the shielding structure, this invention differs from existing technologies in that it employs a multi-layered structure. The innermost layer is a suppression layer made of nano-silver coating or gradient porous metal foam, achieving suppression of near-field electric fields. The absorption layer enables high-frequency absorption without heat buildup. The reflection layer reflects low-frequency electromagnetic waves, achieving low-frequency reflection. This invention, while using a metal shield as the shielding structure, introduces a multi-layered design, effectively overcoming the limitations of single-layer shielding structures in high-frequency signal shielding, the tendency for heat buildup in plastic-encapsulated shielding, and the narrow bandgap of composite material shielding.